./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.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/pthread-ext/31_simple_loop5_vs.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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --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 19:57:58,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:57:58,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:57:58,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:57:58,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:57:58,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:57:58,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:57:58,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:57:58,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:57:58,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:57:58,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:57:58,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:57:58,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:57:58,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:57:58,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:57:58,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:57:58,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:57:58,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:57:58,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:57:58,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:57:58,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:57:58,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:57:58,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:57:58,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:57:58,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:57:58,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:57:58,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:57:58,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:57:58,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:57:58,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:57:58,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:57:58,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:57:58,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:57:58,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:57:58,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:57:58,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:57:58,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:57:58,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:57:58,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:57:58,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:57:58,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:57:58,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:57:58,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:57:58,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:57:58,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:57:58,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:57:58,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:57:58,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:57:58,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:57:58,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:57:58,291 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:57:58,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:57:58,292 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:57:58,292 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:57:58,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:57:58,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:57:58,293 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:57:58,294 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:57:58,294 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:57:58,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:57:58,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:57:58,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:57:58,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:57:58,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:57:58,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:57:58,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:57:58,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:57:58,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:57:58,296 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:57:58,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:57:58,296 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:57:58,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:57:58,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:57:58,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:57:58,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:57:58,600 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:57:58,600 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:57:58,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-29 19:57:59,783 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:58:00,044 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:58:00,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-29 19:58:00,062 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b1fff19/4f7d4e4a3d4c48819c44853312e58ea3/FLAG1c7f53d7c [2023-08-29 19:58:00,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b1fff19/4f7d4e4a3d4c48819c44853312e58ea3 [2023-08-29 19:58:00,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:58:00,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:58:00,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:58:00,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:58:00,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:58:00,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ea2f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00, skipping insertion in model container [2023-08-29 19:58:00,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:58:00,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:58:00,439 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-29 19:58:00,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:58:00,456 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:58:00,495 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-29 19:58:00,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:58:00,531 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:58:00,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00 WrapperNode [2023-08-29 19:58:00,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:58:00,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:58:00,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:58:00,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:58:00,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,565 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-08-29 19:58:00,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:58:00,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:58:00,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:58:00,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:58:00,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:58:00,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:58:00,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:58:00,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:58:00,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (1/1) ... [2023-08-29 19:58:00,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:58:00,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:00,644 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 19:58:00,675 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 19:58:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-29 19:58:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-29 19:58:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:58:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:58:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:58:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:58:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:58:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:58:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:58:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:58:00,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:58:00,692 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 19:58:00,816 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:58:00,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:58:01,063 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:58:01,128 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:58:01,133 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 19:58:01,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:58:01 BoogieIcfgContainer [2023-08-29 19:58:01,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:58:01,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:58:01,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:58:01,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:58:01,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:58:00" (1/3) ... [2023-08-29 19:58:01,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4af7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:58:01, skipping insertion in model container [2023-08-29 19:58:01,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:58:00" (2/3) ... [2023-08-29 19:58:01,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4af7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:58:01, skipping insertion in model container [2023-08-29 19:58:01,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:58:01" (3/3) ... [2023-08-29 19:58:01,143 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-29 19:58:01,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:58:01,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 19:58:01,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:58:01,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:58:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 148 flow [2023-08-29 19:58:01,294 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-08-29 19:58:01,294 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:01,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-29 19:58:01,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 148 flow [2023-08-29 19:58:01,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 68 transitions, 144 flow [2023-08-29 19:58:01,308 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:01,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 68 transitions, 144 flow [2023-08-29 19:58:01,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 68 transitions, 144 flow [2023-08-29 19:58:01,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 144 flow [2023-08-29 19:58:01,368 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-08-29 19:58:01,368 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:01,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-29 19:58:01,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 1290 [2023-08-29 19:58:02,833 INFO L134 LiptonReduction]: Checked pairs total: 2283 [2023-08-29 19:58:02,833 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-29 19:58:02,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:58:02,861 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:02,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 19:58:02,862 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:58:02,863 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:02,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:02,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:58:02,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:02,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:02,870 INFO L85 PathProgramCache]: Analyzing trace with hash 360, now seen corresponding path program 1 times [2023-08-29 19:58:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652602531] [2023-08-29 19:58:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,016 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 19:58:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652602531] [2023-08-29 19:58:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652602531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:58:03,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082505821] [2023-08-29 19:58:03,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:58:03,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:58:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:58:03,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 127 [2023-08-29 19:58:03,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:03,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 127 [2023-08-29 19:58:03,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,146 INFO L130 PetriNetUnfolder]: 195/324 cut-off events. [2023-08-29 19:58:03,146 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 324 events. 195/324 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1225 event pairs, 145 based on Foata normal form. 28/298 useless extension candidates. Maximal degree in co-relation 647. Up to 314 conditions per place. [2023-08-29 19:58:03,153 INFO L137 encePairwiseOnDemand]: 120/127 looper letters, 15 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-29 19:58:03,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 20 transitions, 78 flow [2023-08-29 19:58:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:58:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:58:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2023-08-29 19:58:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196850393700787 [2023-08-29 19:58:03,166 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 132 transitions. [2023-08-29 19:58:03,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 132 transitions. [2023-08-29 19:58:03,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 132 transitions. [2023-08-29 19:58:03,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 19:58:03,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 19:58:03,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 19:58:03,180 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 62 flow. Second operand 2 states and 132 transitions. [2023-08-29 19:58:03,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 20 transitions, 78 flow [2023-08-29 19:58:03,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:03,184 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 47 flow [2023-08-29 19:58:03,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=47, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-08-29 19:58:03,190 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2023-08-29 19:58:03,190 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 47 flow [2023-08-29 19:58:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:03,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:03,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:58:03,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 10964022, now seen corresponding path program 1 times [2023-08-29 19:58:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189681579] [2023-08-29 19:58:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,315 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 19:58:03,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189681579] [2023-08-29 19:58:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189681579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634678520] [2023-08-29 19:58:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:03,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:03,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 127 [2023-08-29 19:58:03,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 19:58:03,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 127 [2023-08-29 19:58:03,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,373 INFO L130 PetriNetUnfolder]: 151/256 cut-off events. [2023-08-29 19:58:03,374 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:03,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 256 events. 151/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 917 event pairs, 111 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 517. Up to 245 conditions per place. [2023-08-29 19:58:03,375 INFO L137 encePairwiseOnDemand]: 125/127 looper letters, 13 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 19:58:03,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 73 flow [2023-08-29 19:58:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2023-08-29 19:58:03,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094488188976378 [2023-08-29 19:58:03,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2023-08-29 19:58:03,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2023-08-29 19:58:03,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2023-08-29 19:58:03,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 19:58:03,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,380 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 47 flow. Second operand 3 states and 156 transitions. [2023-08-29 19:58:03,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 73 flow [2023-08-29 19:58:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 73 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:03,381 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 47 flow [2023-08-29 19:58:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-29 19:58:03,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-29 19:58:03,382 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 47 flow [2023-08-29 19:58:03,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 19:58:03,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:58:03,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 10964023, now seen corresponding path program 1 times [2023-08-29 19:58:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470468434] [2023-08-29 19:58:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470468434] [2023-08-29 19:58:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470468434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151284613] [2023-08-29 19:58:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:03,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 127 [2023-08-29 19:58:03,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 19:58:03,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 127 [2023-08-29 19:58:03,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,551 INFO L130 PetriNetUnfolder]: 107/188 cut-off events. [2023-08-29 19:58:03,551 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:03,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 188 events. 107/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 617 event pairs, 77 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 382. Up to 177 conditions per place. [2023-08-29 19:58:03,552 INFO L137 encePairwiseOnDemand]: 125/127 looper letters, 12 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-29 19:58:03,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 18 transitions, 71 flow [2023-08-29 19:58:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-29 19:58:03,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304461942257218 [2023-08-29 19:58:03,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-29 19:58:03,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-29 19:58:03,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-29 19:58:03,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 19:58:03,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,561 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 47 flow. Second operand 3 states and 164 transitions. [2023-08-29 19:58:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 18 transitions, 71 flow [2023-08-29 19:58:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:03,562 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 46 flow [2023-08-29 19:58:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-29 19:58:03,563 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-29 19:58:03,563 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 46 flow [2023-08-29 19:58:03,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 19:58:03,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:58:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:58:03,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 339842420, now seen corresponding path program 1 times [2023-08-29 19:58:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579394241] [2023-08-29 19:58:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,600 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 19:58:03,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579394241] [2023-08-29 19:58:03,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579394241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:03,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523197705] [2023-08-29 19:58:03,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:03,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 127 [2023-08-29 19:58:03,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 19:58:03,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 127 [2023-08-29 19:58:03,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,655 INFO L130 PetriNetUnfolder]: 215/358 cut-off events. [2023-08-29 19:58:03,655 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 358 events. 215/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1262 event pairs, 66 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 725. Up to 202 conditions per place. [2023-08-29 19:58:03,657 INFO L137 encePairwiseOnDemand]: 121/127 looper letters, 19 selfloop transitions, 4 changer transitions 1/27 dead transitions. [2023-08-29 19:58:03,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 112 flow [2023-08-29 19:58:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-29 19:58:03,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540682414698163 [2023-08-29 19:58:03,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-29 19:58:03,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-29 19:58:03,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-29 19:58:03,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 19:58:03,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,661 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 46 flow. Second operand 3 states and 173 transitions. [2023-08-29 19:58:03,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 112 flow [2023-08-29 19:58:03,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:03,662 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 73 flow [2023-08-29 19:58:03,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-29 19:58:03,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -2 predicate places. [2023-08-29 19:58:03,663 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 73 flow [2023-08-29 19:58:03,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 19:58:03,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:58:03,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash -651430477, now seen corresponding path program 1 times [2023-08-29 19:58:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710444373] [2023-08-29 19:58:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,725 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 19:58:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710444373] [2023-08-29 19:58:03,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710444373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:03,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246523477] [2023-08-29 19:58:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:03,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 127 [2023-08-29 19:58:03,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 19:58:03,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 127 [2023-08-29 19:58:03,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,764 INFO L130 PetriNetUnfolder]: 55/129 cut-off events. [2023-08-29 19:58:03,764 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:58:03,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 129 events. 55/129 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 370 event pairs, 9 based on Foata normal form. 35/161 useless extension candidates. Maximal degree in co-relation 297. Up to 80 conditions per place. [2023-08-29 19:58:03,766 INFO L137 encePairwiseOnDemand]: 123/127 looper letters, 14 selfloop transitions, 4 changer transitions 0/23 dead transitions. [2023-08-29 19:58:03,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 114 flow [2023-08-29 19:58:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-08-29 19:58:03,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47506561679790027 [2023-08-29 19:58:03,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-08-29 19:58:03,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-08-29 19:58:03,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-08-29 19:58:03,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 19:58:03,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 19:58:03,770 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 73 flow. Second operand 3 states and 181 transitions. [2023-08-29 19:58:03,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 114 flow [2023-08-29 19:58:03,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 106 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:58:03,771 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 67 flow [2023-08-29 19:58:03,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-08-29 19:58:03,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-29 19:58:03,773 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 67 flow [2023-08-29 19:58:03,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 19:58:03,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:03,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:58:03,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1862978227, now seen corresponding path program 1 times [2023-08-29 19:58:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321837760] [2023-08-29 19:58:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:03,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321837760] [2023-08-29 19:58:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321837760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:03,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:03,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684533771] [2023-08-29 19:58:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:03,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:58:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:58:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:58:03,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 127 [2023-08-29 19:58:03,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 19:58:03,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:03,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 127 [2023-08-29 19:58:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:03,933 INFO L130 PetriNetUnfolder]: 102/220 cut-off events. [2023-08-29 19:58:03,933 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 19:58:03,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 220 events. 102/220 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 682 event pairs, 18 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 572. Up to 89 conditions per place. [2023-08-29 19:58:03,934 INFO L137 encePairwiseOnDemand]: 123/127 looper letters, 31 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-29 19:58:03,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 205 flow [2023-08-29 19:58:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:58:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:58:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2023-08-29 19:58:03,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220472440944882 [2023-08-29 19:58:03,936 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2023-08-29 19:58:03,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2023-08-29 19:58:03,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:03,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2023-08-29 19:58:03,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 19:58:03,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 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 19:58:03,939 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 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 19:58:03,939 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 67 flow. Second operand 5 states and 268 transitions. [2023-08-29 19:58:03,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 205 flow [2023-08-29 19:58:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:03,941 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 100 flow [2023-08-29 19:58:03,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-29 19:58:03,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-29 19:58:03,941 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 100 flow [2023-08-29 19:58:03,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 19:58:03,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:03,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:03,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:58:03,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:03,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash 603148257, now seen corresponding path program 2 times [2023-08-29 19:58:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709467388] [2023-08-29 19:58:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709467388] [2023-08-29 19:58:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709467388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634910528] [2023-08-29 19:58:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:04,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:04,069 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 19:58:04,101 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 19:58:04,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:04,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:04,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:58:04,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:04,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:04,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634910528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:04,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:04,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 19:58:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349200328] [2023-08-29 19:58:04,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:04,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 19:58:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 19:58:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-29 19:58:04,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 127 [2023-08-29 19:58:04,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 100 flow. Second operand has 17 states, 17 states have (on average 48.64705882352941) internal successors, (827), 17 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 19:58:04,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:04,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 127 [2023-08-29 19:58:04,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:04,730 INFO L130 PetriNetUnfolder]: 126/277 cut-off events. [2023-08-29 19:58:04,730 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-29 19:58:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 277 events. 126/277 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 894 event pairs, 13 based on Foata normal form. 3/277 useless extension candidates. Maximal degree in co-relation 701. Up to 81 conditions per place. [2023-08-29 19:58:04,732 INFO L137 encePairwiseOnDemand]: 123/127 looper letters, 34 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-29 19:58:04,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 253 flow [2023-08-29 19:58:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:58:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:58:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 362 transitions. [2023-08-29 19:58:04,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40719910011248595 [2023-08-29 19:58:04,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 362 transitions. [2023-08-29 19:58:04,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 362 transitions. [2023-08-29 19:58:04,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:04,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 362 transitions. [2023-08-29 19:58:04,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 51.714285714285715) internal successors, (362), 7 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 19:58:04,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 19:58:04,739 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 19:58:04,739 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 100 flow. Second operand 7 states and 362 transitions. [2023-08-29 19:58:04,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 253 flow [2023-08-29 19:58:04,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:04,744 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 146 flow [2023-08-29 19:58:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=146, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-29 19:58:04,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-29 19:58:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 146 flow [2023-08-29 19:58:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.64705882352941) internal successors, (827), 17 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 19:58:04,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:04,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:04,757 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 19:58:04,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:04,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:58:04,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1275057819, now seen corresponding path program 3 times [2023-08-29 19:58:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:04,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828258154] [2023-08-29 19:58:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:04,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828258154] [2023-08-29 19:58:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828258154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71294566] [2023-08-29 19:58:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:05,089 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 19:58:05,111 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 19:58:05,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:58:05,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:58:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:05,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71294566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:05,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:05,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-29 19:58:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651003627] [2023-08-29 19:58:05,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 19:58:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 19:58:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-08-29 19:58:05,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 127 [2023-08-29 19:58:05,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 146 flow. Second operand has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 19:58:05,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:05,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 127 [2023-08-29 19:58:05,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:05,700 INFO L130 PetriNetUnfolder]: 205/437 cut-off events. [2023-08-29 19:58:05,701 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-08-29 19:58:05,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228 conditions, 437 events. 205/437 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1447 event pairs, 18 based on Foata normal form. 9/444 useless extension candidates. Maximal degree in co-relation 1216. Up to 122 conditions per place. [2023-08-29 19:58:05,702 INFO L137 encePairwiseOnDemand]: 123/127 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-29 19:58:05,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 371 flow [2023-08-29 19:58:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:58:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:58:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 452 transitions. [2023-08-29 19:58:05,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545056867891515 [2023-08-29 19:58:05,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 452 transitions. [2023-08-29 19:58:05,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 452 transitions. [2023-08-29 19:58:05,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:05,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 452 transitions. [2023-08-29 19:58:05,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.22222222222222) internal successors, (452), 9 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 19:58:05,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 127.0) internal successors, (1270), 10 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 19:58:05,709 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 127.0) internal successors, (1270), 10 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 19:58:05,709 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 146 flow. Second operand 9 states and 452 transitions. [2023-08-29 19:58:05,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 371 flow [2023-08-29 19:58:05,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 355 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 19:58:05,713 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 19:58:05,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 19:58:05,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-08-29 19:58:05,715 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 19:58:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 19:58:05,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 19:58:05,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-29 19:58:05,718 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 19:58:05,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 19:58:05,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 19:58:05,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-08-29 19:58:05,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 19:58:05,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:05,924 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,SelfDestructingSolverStorable7 [2023-08-29 19:58:05,925 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-29 19:58:05,927 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:58:05,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 148 flow [2023-08-29 19:58:05,939 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-08-29 19:58:05,939 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-29 19:58:05,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 148 flow [2023-08-29 19:58:05,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 66 transitions, 140 flow [2023-08-29 19:58:05,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:05,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 66 transitions, 140 flow [2023-08-29 19:58:05,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 66 transitions, 140 flow [2023-08-29 19:58:05,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 140 flow [2023-08-29 19:58:05,948 INFO L130 PetriNetUnfolder]: 7/81 cut-off events. [2023-08-29 19:58:05,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 7/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-29 19:58:05,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 1290 [2023-08-29 19:58:07,161 INFO L134 LiptonReduction]: Checked pairs total: 2251 [2023-08-29 19:58:07,161 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-08-29 19:58:07,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:58:07,163 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:07,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 19:58:07,166 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-08-29 19:58:07,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:07,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:07,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:07,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:58:07,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:07,167 INFO L85 PathProgramCache]: Analyzing trace with hash -687033816, now seen corresponding path program 1 times [2023-08-29 19:58:07,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121635437] [2023-08-29 19:58:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:07,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:58:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:07,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:58:07,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:58:07,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 19:58:07,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 19:58:07,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:58:07,193 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:58:07,194 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 19:58:07,194 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:58:07,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 19:58:07,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:58:07,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 216 flow [2023-08-29 19:58:07,218 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2023-08-29 19:58:07,218 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:07,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 113 events. 10/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 122. Up to 6 conditions per place. [2023-08-29 19:58:07,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 216 flow [2023-08-29 19:58:07,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 81 transitions, 177 flow [2023-08-29 19:58:07,219 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:07,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 81 transitions, 177 flow [2023-08-29 19:58:07,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 81 transitions, 177 flow [2023-08-29 19:58:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 81 transitions, 177 flow [2023-08-29 19:58:07,227 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2023-08-29 19:58:07,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:07,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 10/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 234 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-29 19:58:07,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 2372 [2023-08-29 19:58:08,427 INFO L134 LiptonReduction]: Checked pairs total: 6303 [2023-08-29 19:58:08,427 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-29 19:58:08,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:58:08,429 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:08,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 19:58:08,429 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:58:08,429 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:08,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:08,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:58:08,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:08,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash 597, now seen corresponding path program 1 times [2023-08-29 19:58:08,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:08,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660857932] [2023-08-29 19:58:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:08,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:08,437 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 19:58:08,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660857932] [2023-08-29 19:58:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660857932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:08,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:58:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642371154] [2023-08-29 19:58:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:58:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:58:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:58:08,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-08-29 19:58:08,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 91 flow. Second operand has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 19:58:08,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:08,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-08-29 19:58:08,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:08,518 INFO L130 PetriNetUnfolder]: 443/945 cut-off events. [2023-08-29 19:58:08,519 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 19:58:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 945 events. 443/945 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5632 event pairs, 285 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1650. Up to 642 conditions per place. [2023-08-29 19:58:08,525 INFO L137 encePairwiseOnDemand]: 151/159 looper letters, 15 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-08-29 19:58:08,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 105 flow [2023-08-29 19:58:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:58:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:58:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2023-08-29 19:58:08,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2023-08-29 19:58:08,526 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2023-08-29 19:58:08,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2023-08-29 19:58:08,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:08,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2023-08-29 19:58:08,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 19:58:08,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 19:58:08,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 19:58:08,529 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 91 flow. Second operand 2 states and 163 transitions. [2023-08-29 19:58:08,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 105 flow [2023-08-29 19:58:08,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:08,530 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 72 flow [2023-08-29 19:58:08,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-29 19:58:08,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-29 19:58:08,531 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 72 flow [2023-08-29 19:58:08,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 19:58:08,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:08,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:08,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:58:08,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:08,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash 18343280, now seen corresponding path program 1 times [2023-08-29 19:58:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696689362] [2023-08-29 19:58:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:08,557 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 19:58:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696689362] [2023-08-29 19:58:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696689362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:08,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78624716] [2023-08-29 19:58:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:08,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-08-29 19:58:08,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 19:58:08,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:08,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-08-29 19:58:08,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:08,630 INFO L130 PetriNetUnfolder]: 321/707 cut-off events. [2023-08-29 19:58:08,630 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-29 19:58:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 707 events. 321/707 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3980 event pairs, 204 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 1232. Up to 467 conditions per place. [2023-08-29 19:58:08,634 INFO L137 encePairwiseOnDemand]: 157/159 looper letters, 13 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 19:58:08,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 98 flow [2023-08-29 19:58:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-29 19:58:08,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276729559748428 [2023-08-29 19:58:08,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-29 19:58:08,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-29 19:58:08,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:08,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-29 19:58:08,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 19:58:08,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,639 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 3 states and 204 transitions. [2023-08-29 19:58:08,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 98 flow [2023-08-29 19:58:08,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:08,640 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 72 flow [2023-08-29 19:58:08,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-29 19:58:08,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-29 19:58:08,641 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 72 flow [2023-08-29 19:58:08,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 19:58:08,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:08,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:08,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:58:08,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:08,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 18343282, now seen corresponding path program 1 times [2023-08-29 19:58:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:08,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790502471] [2023-08-29 19:58:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:08,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:08,676 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 19:58:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790502471] [2023-08-29 19:58:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790502471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:08,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433428681] [2023-08-29 19:58:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:08,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 159 [2023-08-29 19:58:08,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 19:58:08,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:08,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 159 [2023-08-29 19:58:08,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:08,753 INFO L130 PetriNetUnfolder]: 199/469 cut-off events. [2023-08-29 19:58:08,753 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-29 19:58:08,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 469 events. 199/469 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2366 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 821. Up to 293 conditions per place. [2023-08-29 19:58:08,756 INFO L137 encePairwiseOnDemand]: 157/159 looper letters, 12 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-29 19:58:08,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 96 flow [2023-08-29 19:58:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-08-29 19:58:08,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192872117400419 [2023-08-29 19:58:08,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-08-29 19:58:08,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-08-29 19:58:08,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:08,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-08-29 19:58:08,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 19:58:08,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,760 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 72 flow. Second operand 3 states and 200 transitions. [2023-08-29 19:58:08,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 96 flow [2023-08-29 19:58:08,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:08,761 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 71 flow [2023-08-29 19:58:08,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-29 19:58:08,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-29 19:58:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 71 flow [2023-08-29 19:58:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 19:58:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:58:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:58:08,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:08,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 568599035, now seen corresponding path program 1 times [2023-08-29 19:58:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417931054] [2023-08-29 19:58:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:08,786 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 19:58:08,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417931054] [2023-08-29 19:58:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417931054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:08,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936491830] [2023-08-29 19:58:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:08,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 159 [2023-08-29 19:58:08,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 19:58:08,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:08,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 159 [2023-08-29 19:58:08,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:08,964 INFO L130 PetriNetUnfolder]: 1108/1805 cut-off events. [2023-08-29 19:58:08,964 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 19:58:08,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1805 events. 1108/1805 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9874 event pairs, 273 based on Foata normal form. 0/1744 useless extension candidates. Maximal degree in co-relation 3521. Up to 1041 conditions per place. [2023-08-29 19:58:08,974 INFO L137 encePairwiseOnDemand]: 152/159 looper letters, 25 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2023-08-29 19:58:08,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 164 flow [2023-08-29 19:58:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-29 19:58:08,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-29 19:58:08,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-29 19:58:08,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-29 19:58:08,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:08,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-29 19:58:08,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:58:08,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:08,978 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 71 flow. Second operand 3 states and 212 transitions. [2023-08-29 19:58:08,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 164 flow [2023-08-29 19:58:08,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:08,980 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 116 flow [2023-08-29 19:58:08,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-29 19:58:08,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-29 19:58:08,981 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 116 flow [2023-08-29 19:58:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 19:58:08,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:08,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:58:08,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:08,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1885028274, now seen corresponding path program 1 times [2023-08-29 19:58:08,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:08,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16175263] [2023-08-29 19:58:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:09,018 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 19:58:09,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:09,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16175263] [2023-08-29 19:58:09,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16175263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:09,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:09,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676843306] [2023-08-29 19:58:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:09,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:09,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-29 19:58:09,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:58:09,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:09,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-29 19:58:09,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:09,076 INFO L130 PetriNetUnfolder]: 104/334 cut-off events. [2023-08-29 19:58:09,076 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 19:58:09,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 334 events. 104/334 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1640 event pairs, 15 based on Foata normal form. 101/433 useless extension candidates. Maximal degree in co-relation 671. Up to 121 conditions per place. [2023-08-29 19:58:09,077 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 11 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-29 19:58:09,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 154 flow [2023-08-29 19:58:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-29 19:58:09,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2023-08-29 19:58:09,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-29 19:58:09,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-29 19:58:09,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:09,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-29 19:58:09,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:58:09,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:09,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 19:58:09,081 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 116 flow. Second operand 3 states and 227 transitions. [2023-08-29 19:58:09,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 154 flow [2023-08-29 19:58:09,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 142 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 19:58:09,083 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 104 flow [2023-08-29 19:58:09,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-08-29 19:58:09,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-29 19:58:09,084 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 104 flow [2023-08-29 19:58:09,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:58:09,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:09,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:09,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:58:09,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:09,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1715791348, now seen corresponding path program 1 times [2023-08-29 19:58:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:09,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854016366] [2023-08-29 19:58:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:09,146 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 19:58:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854016366] [2023-08-29 19:58:09,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854016366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:09,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:09,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:09,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112030301] [2023-08-29 19:58:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:09,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:58:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:58:09,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:58:09,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 159 [2023-08-29 19:58:09,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 19:58:09,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:09,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 159 [2023-08-29 19:58:09,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:09,272 INFO L130 PetriNetUnfolder]: 271/658 cut-off events. [2023-08-29 19:58:09,273 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-29 19:58:09,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 658 events. 271/658 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3924 event pairs, 25 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1654. Up to 308 conditions per place. [2023-08-29 19:58:09,276 INFO L137 encePairwiseOnDemand]: 151/159 looper letters, 43 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-08-29 19:58:09,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 332 flow [2023-08-29 19:58:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:58:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:58:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 391 transitions. [2023-08-29 19:58:09,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40985324947589097 [2023-08-29 19:58:09,278 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 391 transitions. [2023-08-29 19:58:09,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 391 transitions. [2023-08-29 19:58:09,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:09,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 391 transitions. [2023-08-29 19:58:09,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 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 19:58:09,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 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 19:58:09,281 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 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 19:58:09,281 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 104 flow. Second operand 6 states and 391 transitions. [2023-08-29 19:58:09,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 332 flow [2023-08-29 19:58:09,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:09,283 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 184 flow [2023-08-29 19:58:09,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-29 19:58:09,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-29 19:58:09,284 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 184 flow [2023-08-29 19:58:09,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 19:58:09,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:09,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:09,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:58:09,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:09,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -722495290, now seen corresponding path program 2 times [2023-08-29 19:58:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75986514] [2023-08-29 19:58:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:09,407 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 19:58:09,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:09,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75986514] [2023-08-29 19:58:09,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75986514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:09,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738736396] [2023-08-29 19:58:09,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:09,409 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 19:58:09,438 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 19:58:09,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:09,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:58:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:09,590 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 19:58:09,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:09,676 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 19:58:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738736396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:09,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-29 19:58:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392954599] [2023-08-29 19:58:09,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:09,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 19:58:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 19:58:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-29 19:58:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 159 [2023-08-29 19:58:09,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 184 flow. Second operand has 20 states, 20 states have (on average 58.85) internal successors, (1177), 20 states have internal predecessors, (1177), 0 states have call successors, (0), 0 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 19:58:09,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:09,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 159 [2023-08-29 19:58:09,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:10,190 INFO L130 PetriNetUnfolder]: 439/988 cut-off events. [2023-08-29 19:58:10,191 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-29 19:58:10,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 988 events. 439/988 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6267 event pairs, 19 based on Foata normal form. 8/993 useless extension candidates. Maximal degree in co-relation 2602. Up to 335 conditions per place. [2023-08-29 19:58:10,196 INFO L137 encePairwiseOnDemand]: 149/159 looper letters, 58 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2023-08-29 19:58:10,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 527 flow [2023-08-29 19:58:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:58:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:58:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 692 transitions. [2023-08-29 19:58:10,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956546598056032 [2023-08-29 19:58:10,199 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 692 transitions. [2023-08-29 19:58:10,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 692 transitions. [2023-08-29 19:58:10,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:10,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 692 transitions. [2023-08-29 19:58:10,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.90909090909091) internal successors, (692), 11 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 19:58:10,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 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 19:58:10,205 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 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 19:58:10,205 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 184 flow. Second operand 11 states and 692 transitions. [2023-08-29 19:58:10,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 527 flow [2023-08-29 19:58:10,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:10,209 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 327 flow [2023-08-29 19:58:10,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-29 19:58:10,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2023-08-29 19:58:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 327 flow [2023-08-29 19:58:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.85) internal successors, (1177), 20 states have internal predecessors, (1177), 0 states have call successors, (0), 0 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 19:58:10,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:10,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:10,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:10,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:10,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:58:10,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1718311936, now seen corresponding path program 3 times [2023-08-29 19:58:10,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:10,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602480008] [2023-08-29 19:58:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:10,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602480008] [2023-08-29 19:58:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602480008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140267810] [2023-08-29 19:58:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:10,532 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 19:58:10,557 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 19:58:10,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:58:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:58:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:10,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140267810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:10,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:10,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-29 19:58:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821785141] [2023-08-29 19:58:10,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:58:10,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:58:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:58:10,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 159 [2023-08-29 19:58:10,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 327 flow. Second operand has 24 states, 24 states have (on average 57.125) internal successors, (1371), 24 states have internal predecessors, (1371), 0 states have call successors, (0), 0 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 19:58:10,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:10,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 159 [2023-08-29 19:58:10,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:11,617 INFO L130 PetriNetUnfolder]: 742/1629 cut-off events. [2023-08-29 19:58:11,617 INFO L131 PetriNetUnfolder]: For 1171/1171 co-relation queries the response was YES. [2023-08-29 19:58:11,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 1629 events. 742/1629 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10586 event pairs, 25 based on Foata normal form. 24/1650 useless extension candidates. Maximal degree in co-relation 5064. Up to 426 conditions per place. [2023-08-29 19:58:11,623 INFO L137 encePairwiseOnDemand]: 149/159 looper letters, 0 selfloop transitions, 0 changer transitions 117/117 dead transitions. [2023-08-29 19:58:11,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 853 flow [2023-08-29 19:58:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:58:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:58:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 895 transitions. [2023-08-29 19:58:11,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752620545073375 [2023-08-29 19:58:11,626 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 895 transitions. [2023-08-29 19:58:11,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 895 transitions. [2023-08-29 19:58:11,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 895 transitions. [2023-08-29 19:58:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 59.666666666666664) internal successors, (895), 15 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 19:58:11,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 159.0) internal successors, (2544), 16 states have internal predecessors, (2544), 0 states have call successors, (0), 0 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 19:58:11,645 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 159.0) internal successors, (2544), 16 states have internal predecessors, (2544), 0 states have call successors, (0), 0 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 19:58:11,645 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 327 flow. Second operand 15 states and 895 transitions. [2023-08-29 19:58:11,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 853 flow [2023-08-29 19:58:11,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 815 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-29 19:58:11,651 INFO L231 Difference]: Finished difference. Result has 69 places, 0 transitions, 0 flow [2023-08-29 19:58:11,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=69, PETRI_TRANSITIONS=0} [2023-08-29 19:58:11,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-08-29 19:58:11,651 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 0 transitions, 0 flow [2023-08-29 19:58:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.125) internal successors, (1371), 24 states have internal predecessors, (1371), 0 states have call successors, (0), 0 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 19:58:11,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 19:58:11,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-08-29 19:58:11,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 19:58:11,663 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 19:58:11,861 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 19:58:11,861 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-29 19:58:11,861 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:58:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 216 flow [2023-08-29 19:58:11,872 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2023-08-29 19:58:11,873 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:11,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 113 events. 10/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 122. Up to 6 conditions per place. [2023-08-29 19:58:11,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 216 flow [2023-08-29 19:58:11,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 79 transitions, 173 flow [2023-08-29 19:58:11,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:11,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 79 transitions, 173 flow [2023-08-29 19:58:11,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 79 transitions, 173 flow [2023-08-29 19:58:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 173 flow [2023-08-29 19:58:11,882 INFO L130 PetriNetUnfolder]: 10/111 cut-off events. [2023-08-29 19:58:11,882 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:11,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 111 events. 10/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 229 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-29 19:58:11,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 2372 [2023-08-29 19:58:13,005 INFO L134 LiptonReduction]: Checked pairs total: 6170 [2023-08-29 19:58:13,005 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-29 19:58:13,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:58:13,006 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:13,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 19:58:13,010 INFO L130 PetriNetUnfolder]: 3/44 cut-off events. [2023-08-29 19:58:13,010 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:58:13,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:13,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:13,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:58:13,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2120737094, now seen corresponding path program 1 times [2023-08-29 19:58:13,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:13,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539450561] [2023-08-29 19:58:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:13,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:13,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:58:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:13,028 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:58:13,028 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:58:13,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 19:58:13,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 19:58:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:58:13,029 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:58:13,030 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 19:58:13,030 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:58:13,030 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 19:58:13,046 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:58:13,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 123 transitions, 288 flow [2023-08-29 19:58:13,057 INFO L130 PetriNetUnfolder]: 13/143 cut-off events. [2023-08-29 19:58:13,057 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:58:13,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 143 events. 13/143 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 341 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-08-29 19:58:13,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 123 transitions, 288 flow [2023-08-29 19:58:13,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 212 flow [2023-08-29 19:58:13,059 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:13,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 94 transitions, 212 flow [2023-08-29 19:58:13,059 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 94 transitions, 212 flow [2023-08-29 19:58:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 212 flow [2023-08-29 19:58:13,068 INFO L130 PetriNetUnfolder]: 13/143 cut-off events. [2023-08-29 19:58:13,068 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:58:13,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 143 events. 13/143 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-29 19:58:13,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 3766 [2023-08-29 19:58:14,449 INFO L134 LiptonReduction]: Checked pairs total: 12666 [2023-08-29 19:58:14,450 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-29 19:58:14,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:58:14,452 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:14,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 19:58:14,452 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:58:14,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:58:14,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:14,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 869, now seen corresponding path program 1 times [2023-08-29 19:58:14,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126911535] [2023-08-29 19:58:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:14,457 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 19:58:14,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126911535] [2023-08-29 19:58:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126911535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:14,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:58:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779553302] [2023-08-29 19:58:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:58:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:58:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:58:14,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 189 [2023-08-29 19:58:14,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 19:58:14,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:14,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 189 [2023-08-29 19:58:14,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:14,743 INFO L130 PetriNetUnfolder]: 1883/3489 cut-off events. [2023-08-29 19:58:14,743 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-29 19:58:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 3489 events. 1883/3489 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24006 event pairs, 1218 based on Foata normal form. 0/3182 useless extension candidates. Maximal degree in co-relation 6258. Up to 2478 conditions per place. [2023-08-29 19:58:14,762 INFO L137 encePairwiseOnDemand]: 180/189 looper letters, 18 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-08-29 19:58:14,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 136 flow [2023-08-29 19:58:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:58:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:58:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-08-29 19:58:14,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2023-08-29 19:58:14,764 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-08-29 19:58:14,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-08-29 19:58:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-08-29 19:58:14,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 19:58:14,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 19:58:14,766 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 19:58:14,766 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 2 states and 197 transitions. [2023-08-29 19:58:14,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 136 flow [2023-08-29 19:58:14,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:14,767 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 93 flow [2023-08-29 19:58:14,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=93, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-29 19:58:14,768 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-29 19:58:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 93 flow [2023-08-29 19:58:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 19:58:14,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:14,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:58:14,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:14,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 26681004, now seen corresponding path program 1 times [2023-08-29 19:58:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:14,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723103449] [2023-08-29 19:58:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:14,800 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 19:58:14,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:14,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723103449] [2023-08-29 19:58:14,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723103449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:14,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:14,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:14,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111271523] [2023-08-29 19:58:14,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:14,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:14,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:14,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 189 [2023-08-29 19:58:14,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 19:58:14,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:14,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 189 [2023-08-29 19:58:14,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:15,022 INFO L130 PetriNetUnfolder]: 1365/2603 cut-off events. [2023-08-29 19:58:15,022 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-29 19:58:15,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 2603 events. 1365/2603 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17284 event pairs, 876 based on Foata normal form. 0/2422 useless extension candidates. Maximal degree in co-relation 4592. Up to 1799 conditions per place. [2023-08-29 19:58:15,041 INFO L137 encePairwiseOnDemand]: 187/189 looper letters, 16 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-29 19:58:15,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 125 flow [2023-08-29 19:58:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-29 19:58:15,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-08-29 19:58:15,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-29 19:58:15,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-29 19:58:15,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:15,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-29 19:58:15,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 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 19:58:15,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:15,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:15,046 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 93 flow. Second operand 3 states and 258 transitions. [2023-08-29 19:58:15,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 125 flow [2023-08-29 19:58:15,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:15,049 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 93 flow [2023-08-29 19:58:15,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-29 19:58:15,049 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-29 19:58:15,050 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 93 flow [2023-08-29 19:58:15,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 19:58:15,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:15,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:15,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:58:15,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:15,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash 26681003, now seen corresponding path program 1 times [2023-08-29 19:58:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589582865] [2023-08-29 19:58:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:15,068 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 19:58:15,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:15,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589582865] [2023-08-29 19:58:15,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589582865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:15,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:15,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:15,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042882515] [2023-08-29 19:58:15,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:15,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 189 [2023-08-29 19:58:15,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:58:15,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:15,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 189 [2023-08-29 19:58:15,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:15,209 INFO L130 PetriNetUnfolder]: 847/1717 cut-off events. [2023-08-29 19:58:15,209 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-29 19:58:15,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3036 conditions, 1717 events. 847/1717 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10842 event pairs, 534 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 3029. Up to 1121 conditions per place. [2023-08-29 19:58:15,216 INFO L137 encePairwiseOnDemand]: 187/189 looper letters, 15 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-29 19:58:15,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 123 flow [2023-08-29 19:58:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-29 19:58:15,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43738977072310403 [2023-08-29 19:58:15,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-29 19:58:15,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-29 19:58:15,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:15,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-29 19:58:15,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 19:58:15,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:15,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:15,220 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 93 flow. Second operand 3 states and 248 transitions. [2023-08-29 19:58:15,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 123 flow [2023-08-29 19:58:15,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:15,221 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 92 flow [2023-08-29 19:58:15,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-29 19:58:15,221 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-29 19:58:15,222 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 92 flow [2023-08-29 19:58:15,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:58:15,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:15,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:58:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:58:15,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:15,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash 827049509, now seen corresponding path program 1 times [2023-08-29 19:58:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:15,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011594786] [2023-08-29 19:58:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:15,241 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 19:58:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011594786] [2023-08-29 19:58:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011594786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032346567] [2023-08-29 19:58:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:15,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 189 [2023-08-29 19:58:15,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 19:58:15,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:15,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 189 [2023-08-29 19:58:15,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:16,056 INFO L130 PetriNetUnfolder]: 8028/11565 cut-off events. [2023-08-29 19:58:16,056 INFO L131 PetriNetUnfolder]: For 672/672 co-relation queries the response was YES. [2023-08-29 19:58:16,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22798 conditions, 11565 events. 8028/11565 cut-off events. For 672/672 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 69031 event pairs, 2122 based on Foata normal form. 0/11256 useless extension candidates. Maximal degree in co-relation 22791. Up to 7357 conditions per place. [2023-08-29 19:58:16,111 INFO L137 encePairwiseOnDemand]: 180/189 looper letters, 33 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2023-08-29 19:58:16,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 220 flow [2023-08-29 19:58:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-29 19:58:16,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2023-08-29 19:58:16,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-29 19:58:16,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-29 19:58:16,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:16,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-29 19:58:16,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 19:58:16,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:16,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:16,116 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 92 flow. Second operand 3 states and 255 transitions. [2023-08-29 19:58:16,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 220 flow [2023-08-29 19:58:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:16,119 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 153 flow [2023-08-29 19:58:16,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-29 19:58:16,119 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-29 19:58:16,120 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 153 flow [2023-08-29 19:58:16,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 19:58:16,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:16,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:16,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:58:16,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:16,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash 249704829, now seen corresponding path program 1 times [2023-08-29 19:58:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332374] [2023-08-29 19:58:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:16,152 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 19:58:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332374] [2023-08-29 19:58:16,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:16,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:16,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187092588] [2023-08-29 19:58:16,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:16,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:16,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:16,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 189 [2023-08-29 19:58:16,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 19:58:16,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:16,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 189 [2023-08-29 19:58:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:16,301 INFO L130 PetriNetUnfolder]: 303/927 cut-off events. [2023-08-29 19:58:16,301 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-29 19:58:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 927 events. 303/927 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5856 event pairs, 39 based on Foata normal form. 413/1336 useless extension candidates. Maximal degree in co-relation 1863. Up to 343 conditions per place. [2023-08-29 19:58:16,305 INFO L137 encePairwiseOnDemand]: 181/189 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2023-08-29 19:58:16,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 200 flow [2023-08-29 19:58:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-29 19:58:16,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48853615520282184 [2023-08-29 19:58:16,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-29 19:58:16,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-29 19:58:16,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:16,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-29 19:58:16,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 19:58:16,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:16,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 19:58:16,309 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 153 flow. Second operand 3 states and 277 transitions. [2023-08-29 19:58:16,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 200 flow [2023-08-29 19:58:16,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 184 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 19:58:16,311 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 135 flow [2023-08-29 19:58:16,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-29 19:58:16,312 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-29 19:58:16,312 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 135 flow [2023-08-29 19:58:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 19:58:16,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:16,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:58:16,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:16,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash -862982514, now seen corresponding path program 1 times [2023-08-29 19:58:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678181966] [2023-08-29 19:58:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:16,370 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 19:58:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:16,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678181966] [2023-08-29 19:58:16,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678181966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:16,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747923601] [2023-08-29 19:58:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:58:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:58:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:58:16,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 189 [2023-08-29 19:58:16,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 19:58:16,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:16,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 189 [2023-08-29 19:58:16,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:16,623 INFO L130 PetriNetUnfolder]: 794/1797 cut-off events. [2023-08-29 19:58:16,623 INFO L131 PetriNetUnfolder]: For 657/657 co-relation queries the response was YES. [2023-08-29 19:58:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 1797 events. 794/1797 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12938 event pairs, 41 based on Foata normal form. 0/1772 useless extension candidates. Maximal degree in co-relation 4613. Up to 1016 conditions per place. [2023-08-29 19:58:16,631 INFO L137 encePairwiseOnDemand]: 178/189 looper letters, 57 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2023-08-29 19:58:16,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 457 flow [2023-08-29 19:58:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:58:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:58:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2023-08-29 19:58:16,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2023-08-29 19:58:16,634 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2023-08-29 19:58:16,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2023-08-29 19:58:16,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:16,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2023-08-29 19:58:16,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 19:58:16,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 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 19:58:16,637 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 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 19:58:16,637 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 135 flow. Second operand 6 states and 468 transitions. [2023-08-29 19:58:16,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 457 flow [2023-08-29 19:58:16,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:16,640 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 254 flow [2023-08-29 19:58:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-08-29 19:58:16,640 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-29 19:58:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 254 flow [2023-08-29 19:58:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 19:58:16,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:16,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:58:16,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:16,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash -775454033, now seen corresponding path program 2 times [2023-08-29 19:58:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892173144] [2023-08-29 19:58:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:16,757 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 19:58:16,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892173144] [2023-08-29 19:58:16,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892173144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356554761] [2023-08-29 19:58:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:16,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:16,761 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 19:58:16,784 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 19:58:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:58:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:16,948 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 19:58:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:17,042 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 19:58:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356554761] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:17,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-29 19:58:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734390375] [2023-08-29 19:58:17,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 19:58:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 19:58:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-29 19:58:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 189 [2023-08-29 19:58:17,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 254 flow. Second operand has 20 states, 20 states have (on average 68.85) internal successors, (1377), 20 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 19:58:17,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:17,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 189 [2023-08-29 19:58:17,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:17,823 INFO L130 PetriNetUnfolder]: 1369/2861 cut-off events. [2023-08-29 19:58:17,824 INFO L131 PetriNetUnfolder]: For 1159/1159 co-relation queries the response was YES. [2023-08-29 19:58:17,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 2861 events. 1369/2861 cut-off events. For 1159/1159 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21713 event pairs, 33 based on Foata normal form. 20/2878 useless extension candidates. Maximal degree in co-relation 7733. Up to 1143 conditions per place. [2023-08-29 19:58:17,835 INFO L137 encePairwiseOnDemand]: 175/189 looper letters, 81 selfloop transitions, 34 changer transitions 0/124 dead transitions. [2023-08-29 19:58:17,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 124 transitions, 769 flow [2023-08-29 19:58:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:58:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:58:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 833 transitions. [2023-08-29 19:58:17,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006734006734007 [2023-08-29 19:58:17,838 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 833 transitions. [2023-08-29 19:58:17,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 833 transitions. [2023-08-29 19:58:17,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:17,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 833 transitions. [2023-08-29 19:58:17,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 75.72727272727273) internal successors, (833), 11 states have internal predecessors, (833), 0 states have call successors, (0), 0 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 19:58:17,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 189.0) internal successors, (2268), 12 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 19:58:17,843 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 189.0) internal successors, (2268), 12 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 19:58:17,843 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 254 flow. Second operand 11 states and 833 transitions. [2023-08-29 19:58:17,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 124 transitions, 769 flow [2023-08-29 19:58:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 124 transitions, 769 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:17,848 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 466 flow [2023-08-29 19:58:17,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=466, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-08-29 19:58:17,848 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 18 predicate places. [2023-08-29 19:58:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 466 flow [2023-08-29 19:58:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.85) internal successors, (1377), 20 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 19:58:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:17,857 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 19:58:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-29 19:58:18,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:58:18,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1728949912, now seen corresponding path program 3 times [2023-08-29 19:58:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:18,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214080759] [2023-08-29 19:58:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214080759] [2023-08-29 19:58:18,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214080759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699907697] [2023-08-29 19:58:18,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:18,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:18,130 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 19:58:18,132 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 19:58:18,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:58:18,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:58:18,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:18,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699907697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:18,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-29 19:58:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015139159] [2023-08-29 19:58:18,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:58:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:58:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:58:18,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 189 [2023-08-29 19:58:18,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 466 flow. Second operand has 24 states, 24 states have (on average 66.125) internal successors, (1587), 24 states have internal predecessors, (1587), 0 states have call successors, (0), 0 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 19:58:18,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:18,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 189 [2023-08-29 19:58:18,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:19,445 INFO L130 PetriNetUnfolder]: 2444/5009 cut-off events. [2023-08-29 19:58:19,445 INFO L131 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2023-08-29 19:58:19,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15926 conditions, 5009 events. 2444/5009 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 39654 event pairs, 41 based on Foata normal form. 66/5072 useless extension candidates. Maximal degree in co-relation 15908. Up to 1252 conditions per place. [2023-08-29 19:58:19,458 INFO L137 encePairwiseOnDemand]: 175/189 looper letters, 0 selfloop transitions, 0 changer transitions 164/164 dead transitions. [2023-08-29 19:58:19,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 164 transitions, 1251 flow [2023-08-29 19:58:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:58:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:58:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1063 transitions. [2023-08-29 19:58:19,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37495590828924164 [2023-08-29 19:58:19,461 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1063 transitions. [2023-08-29 19:58:19,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1063 transitions. [2023-08-29 19:58:19,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:19,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1063 transitions. [2023-08-29 19:58:19,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.86666666666666) internal successors, (1063), 15 states have internal predecessors, (1063), 0 states have call successors, (0), 0 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 19:58:19,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 189.0) internal successors, (3024), 16 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 19:58:19,467 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 189.0) internal successors, (3024), 16 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 19:58:19,467 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 466 flow. Second operand 15 states and 1063 transitions. [2023-08-29 19:58:19,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 164 transitions, 1251 flow [2023-08-29 19:58:19,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 164 transitions, 1195 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-29 19:58:19,486 INFO L231 Difference]: Finished difference. Result has 78 places, 0 transitions, 0 flow [2023-08-29 19:58:19,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=78, PETRI_TRANSITIONS=0} [2023-08-29 19:58:19,486 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-29 19:58:19,486 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 0 transitions, 0 flow [2023-08-29 19:58:19,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.125) internal successors, (1587), 24 states have internal predecessors, (1587), 0 states have call successors, (0), 0 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 19:58:19,487 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-08-29 19:58:19,487 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 19:58:19,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 9 remaining) [2023-08-29 19:58:19,495 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 19:58:19,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 19:58:19,695 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-29 19:58:19,695 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:58:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 123 transitions, 288 flow [2023-08-29 19:58:19,707 INFO L130 PetriNetUnfolder]: 13/143 cut-off events. [2023-08-29 19:58:19,707 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:58:19,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 143 events. 13/143 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 341 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-08-29 19:58:19,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 123 transitions, 288 flow [2023-08-29 19:58:19,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 208 flow [2023-08-29 19:58:19,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:19,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 92 transitions, 208 flow [2023-08-29 19:58:19,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 92 transitions, 208 flow [2023-08-29 19:58:19,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 92 transitions, 208 flow [2023-08-29 19:58:19,718 INFO L130 PetriNetUnfolder]: 13/141 cut-off events. [2023-08-29 19:58:19,718 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:58:19,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 141 events. 13/141 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 334 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-29 19:58:19,721 INFO L119 LiptonReduction]: Number of co-enabled transitions 3766 [2023-08-29 19:58:20,771 INFO L134 LiptonReduction]: Checked pairs total: 11442 [2023-08-29 19:58:20,771 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-29 19:58:20,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:58:20,773 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:20,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 19:58:20,776 INFO L130 PetriNetUnfolder]: 4/61 cut-off events. [2023-08-29 19:58:20,777 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:58:20,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:20,777 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:20,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:58:20,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 261425474, now seen corresponding path program 1 times [2023-08-29 19:58:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550190398] [2023-08-29 19:58:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:20,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:20,786 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:58:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:20,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:58:20,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:58:20,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 19:58:20,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 19:58:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:58:20,794 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:58:20,795 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 19:58:20,795 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:58:20,795 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 19:58:20,815 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:58:20,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 364 flow [2023-08-29 19:58:20,827 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-29 19:58:20,827 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:58:20,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 173 events. 16/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-08-29 19:58:20,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 364 flow [2023-08-29 19:58:20,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 249 flow [2023-08-29 19:58:20,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:20,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 249 flow [2023-08-29 19:58:20,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 249 flow [2023-08-29 19:58:20,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 249 flow [2023-08-29 19:58:20,839 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-29 19:58:20,839 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:58:20,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 173 events. 16/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-29 19:58:20,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 5472 [2023-08-29 19:58:22,086 INFO L134 LiptonReduction]: Checked pairs total: 17397 [2023-08-29 19:58:22,087 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-29 19:58:22,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:58:22,091 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:22,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 19:58:22,091 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:58:22,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:22,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:22,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:58:22,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:22,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1182, now seen corresponding path program 1 times [2023-08-29 19:58:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:22,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156960522] [2023-08-29 19:58:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:22,096 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 19:58:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156960522] [2023-08-29 19:58:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156960522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:22,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:58:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110134545] [2023-08-29 19:58:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:22,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:58:22,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:58:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:58:22,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 225 [2023-08-29 19:58:22,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 149 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 19:58:22,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:22,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 225 [2023-08-29 19:58:22,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:22,763 INFO L130 PetriNetUnfolder]: 7391/12309 cut-off events. [2023-08-29 19:58:22,763 INFO L131 PetriNetUnfolder]: For 1798/1798 co-relation queries the response was YES. [2023-08-29 19:58:22,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 12309 events. 7391/12309 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 91346 event pairs, 4809 based on Foata normal form. 0/11390 useless extension candidates. Maximal degree in co-relation 22638. Up to 9174 conditions per place. [2023-08-29 19:58:22,822 INFO L137 encePairwiseOnDemand]: 215/225 looper letters, 21 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-08-29 19:58:22,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 169 flow [2023-08-29 19:58:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:58:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:58:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2023-08-29 19:58:22,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2023-08-29 19:58:22,823 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2023-08-29 19:58:22,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2023-08-29 19:58:22,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:22,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2023-08-29 19:58:22,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:58:22,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 19:58:22,829 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 19:58:22,829 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 149 flow. Second operand 2 states and 231 transitions. [2023-08-29 19:58:22,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 169 flow [2023-08-29 19:58:22,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 156 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:22,832 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 114 flow [2023-08-29 19:58:22,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-29 19:58:22,833 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-29 19:58:22,833 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 114 flow [2023-08-29 19:58:22,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 19:58:22,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:22,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:58:22,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:22,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash 36245088, now seen corresponding path program 1 times [2023-08-29 19:58:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496659792] [2023-08-29 19:58:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496659792] [2023-08-29 19:58:22,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496659792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:22,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:22,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495081030] [2023-08-29 19:58:22,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:22,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:22,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-08-29 19:58:22,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 19:58:22,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:22,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-08-29 19:58:22,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:23,430 INFO L130 PetriNetUnfolder]: 5361/9155 cut-off events. [2023-08-29 19:58:23,430 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-29 19:58:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16407 conditions, 9155 events. 5361/9155 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66599 event pairs, 3468 based on Foata normal form. 0/8614 useless extension candidates. Maximal degree in co-relation 16400. Up to 6659 conditions per place. [2023-08-29 19:58:23,482 INFO L137 encePairwiseOnDemand]: 223/225 looper letters, 19 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 19:58:23,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 152 flow [2023-08-29 19:58:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-29 19:58:23,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-08-29 19:58:23,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-29 19:58:23,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-29 19:58:23,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:23,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-29 19:58:23,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 19:58:23,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:23,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:23,487 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 114 flow. Second operand 3 states and 297 transitions. [2023-08-29 19:58:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 152 flow [2023-08-29 19:58:23,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:23,488 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 114 flow [2023-08-29 19:58:23,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-29 19:58:23,488 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-29 19:58:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 114 flow [2023-08-29 19:58:23,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 19:58:23,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:23,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:23,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:58:23,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:23,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 36245087, now seen corresponding path program 1 times [2023-08-29 19:58:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504381964] [2023-08-29 19:58:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:23,506 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 19:58:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504381964] [2023-08-29 19:58:23,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504381964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059096737] [2023-08-29 19:58:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 225 [2023-08-29 19:58:23,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 19:58:23,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:23,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 225 [2023-08-29 19:58:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:23,830 INFO L130 PetriNetUnfolder]: 3331/6001 cut-off events. [2023-08-29 19:58:23,830 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-29 19:58:23,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10741 conditions, 6001 events. 3331/6001 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 42754 event pairs, 2127 based on Foata normal form. 0/5838 useless extension candidates. Maximal degree in co-relation 10733. Up to 4145 conditions per place. [2023-08-29 19:58:23,851 INFO L137 encePairwiseOnDemand]: 223/225 looper letters, 18 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-29 19:58:23,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 150 flow [2023-08-29 19:58:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-29 19:58:23,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44296296296296295 [2023-08-29 19:58:23,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-29 19:58:23,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-29 19:58:23,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:23,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-29 19:58:23,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 19:58:23,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:23,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:23,855 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 3 states and 299 transitions. [2023-08-29 19:58:23,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 150 flow [2023-08-29 19:58:23,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:23,856 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 113 flow [2023-08-29 19:58:23,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-29 19:58:23,856 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-29 19:58:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 113 flow [2023-08-29 19:58:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 19:58:23,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:23,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:58:23,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 19:58:23,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:23,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1123530886, now seen corresponding path program 1 times [2023-08-29 19:58:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602129248] [2023-08-29 19:58:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:23,875 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 19:58:23,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602129248] [2023-08-29 19:58:23,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602129248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:23,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721371523] [2023-08-29 19:58:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:23,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 225 [2023-08-29 19:58:23,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 19:58:23,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:23,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 225 [2023-08-29 19:58:23,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:27,635 INFO L130 PetriNetUnfolder]: 52255/69822 cut-off events. [2023-08-29 19:58:27,635 INFO L131 PetriNetUnfolder]: For 3523/3523 co-relation queries the response was YES. [2023-08-29 19:58:27,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138243 conditions, 69822 events. 52255/69822 cut-off events. For 3523/3523 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 437914 event pairs, 15212 based on Foata normal form. 0/68265 useless extension candidates. Maximal degree in co-relation 138235. Up to 46663 conditions per place. [2023-08-29 19:58:27,941 INFO L137 encePairwiseOnDemand]: 214/225 looper letters, 41 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2023-08-29 19:58:27,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 276 flow [2023-08-29 19:58:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-29 19:58:27,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414814814814815 [2023-08-29 19:58:27,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-29 19:58:27,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-29 19:58:27,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:27,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-29 19:58:27,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 19:58:27,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:27,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:27,944 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 113 flow. Second operand 3 states and 298 transitions. [2023-08-29 19:58:27,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 276 flow [2023-08-29 19:58:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:27,950 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 190 flow [2023-08-29 19:58:27,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-08-29 19:58:27,954 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-08-29 19:58:27,955 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 190 flow [2023-08-29 19:58:27,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 19:58:27,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:27,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 19:58:27,956 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:27,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1492831230, now seen corresponding path program 1 times [2023-08-29 19:58:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123822967] [2023-08-29 19:58:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:28,008 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 19:58:28,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123822967] [2023-08-29 19:58:28,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123822967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808769773] [2023-08-29 19:58:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:28,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:28,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 225 [2023-08-29 19:58:28,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:58:28,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:28,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 225 [2023-08-29 19:58:28,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:28,142 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2023-08-29 19:58:28,142 INFO L131 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2023-08-29 19:58:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2336 events. 794/2336 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17823 event pairs, 99 based on Foata normal form. 1373/3702 useless extension candidates. Maximal degree in co-relation 4690. Up to 881 conditions per place. [2023-08-29 19:58:28,148 INFO L137 encePairwiseOnDemand]: 215/225 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-29 19:58:28,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 246 flow [2023-08-29 19:58:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-29 19:58:28,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2023-08-29 19:58:28,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-29 19:58:28,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-29 19:58:28,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:28,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-29 19:58:28,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 19:58:28,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:28,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:58:28,152 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 190 flow. Second operand 3 states and 327 transitions. [2023-08-29 19:58:28,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 246 flow [2023-08-29 19:58:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 226 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-29 19:58:28,156 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 166 flow [2023-08-29 19:58:28,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-29 19:58:28,156 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-08-29 19:58:28,157 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 166 flow [2023-08-29 19:58:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:58:28,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:28,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:28,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:58:28,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:28,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash -899971845, now seen corresponding path program 1 times [2023-08-29 19:58:28,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:28,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917170176] [2023-08-29 19:58:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:28,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917170176] [2023-08-29 19:58:28,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917170176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:28,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:28,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:58:28,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874605831] [2023-08-29 19:58:28,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:28,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:58:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:28,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:58:28,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:58:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 225 [2023-08-29 19:58:28,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 19:58:28,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:28,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 225 [2023-08-29 19:58:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:28,648 INFO L130 PetriNetUnfolder]: 1997/4326 cut-off events. [2023-08-29 19:58:28,649 INFO L131 PetriNetUnfolder]: For 1659/1659 co-relation queries the response was YES. [2023-08-29 19:58:28,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 4326 events. 1997/4326 cut-off events. For 1659/1659 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35187 event pairs, 65 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 11225. Up to 2808 conditions per place. [2023-08-29 19:58:28,661 INFO L137 encePairwiseOnDemand]: 211/225 looper letters, 71 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2023-08-29 19:58:28,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 582 flow [2023-08-29 19:58:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:58:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:58:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 545 transitions. [2023-08-29 19:58:28,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2023-08-29 19:58:28,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 545 transitions. [2023-08-29 19:58:28,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 545 transitions. [2023-08-29 19:58:28,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:28,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 545 transitions. [2023-08-29 19:58:28,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 19:58:28,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 225.0) internal successors, (1575), 7 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 19:58:28,666 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 225.0) internal successors, (1575), 7 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 19:58:28,666 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 166 flow. Second operand 6 states and 545 transitions. [2023-08-29 19:58:28,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 582 flow [2023-08-29 19:58:28,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:28,673 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 324 flow [2023-08-29 19:58:28,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-08-29 19:58:28,674 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-29 19:58:28,674 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 324 flow [2023-08-29 19:58:28,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 19:58:28,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:28,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:28,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 19:58:28,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:28,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1462956916, now seen corresponding path program 2 times [2023-08-29 19:58:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505020231] [2023-08-29 19:58:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:28,760 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 19:58:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505020231] [2023-08-29 19:58:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505020231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763629560] [2023-08-29 19:58:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:28,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:28,762 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 19:58:28,764 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 19:58:28,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:28,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:58:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:28,948 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 19:58:28,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:29,027 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 19:58:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763629560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:29,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-29 19:58:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148566103] [2023-08-29 19:58:29,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 19:58:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 19:58:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-29 19:58:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 225 [2023-08-29 19:58:29,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 324 flow. Second operand has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 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 19:58:29,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:29,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 225 [2023-08-29 19:58:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:29,979 INFO L130 PetriNetUnfolder]: 3472/6945 cut-off events. [2023-08-29 19:58:29,979 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2023-08-29 19:58:29,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19035 conditions, 6945 events. 3472/6945 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59851 event pairs, 51 based on Foata normal form. 40/6982 useless extension candidates. Maximal degree in co-relation 19022. Up to 3249 conditions per place. [2023-08-29 19:58:30,093 INFO L137 encePairwiseOnDemand]: 207/225 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2023-08-29 19:58:30,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 159 transitions, 1011 flow [2023-08-29 19:58:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:58:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:58:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 974 transitions. [2023-08-29 19:58:30,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935353535353535 [2023-08-29 19:58:30,097 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 974 transitions. [2023-08-29 19:58:30,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 974 transitions. [2023-08-29 19:58:30,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:30,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 974 transitions. [2023-08-29 19:58:30,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.54545454545455) internal successors, (974), 11 states have internal predecessors, (974), 0 states have call successors, (0), 0 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 19:58:30,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 225.0) internal successors, (2700), 12 states have internal predecessors, (2700), 0 states have call successors, (0), 0 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 19:58:30,102 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 225.0) internal successors, (2700), 12 states have internal predecessors, (2700), 0 states have call successors, (0), 0 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 19:58:30,102 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 324 flow. Second operand 11 states and 974 transitions. [2023-08-29 19:58:30,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 159 transitions, 1011 flow [2023-08-29 19:58:30,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 159 transitions, 1011 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:30,111 INFO L231 Difference]: Finished difference. Result has 79 places, 93 transitions, 605 flow [2023-08-29 19:58:30,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=605, PETRI_PLACES=79, PETRI_TRANSITIONS=93} [2023-08-29 19:58:30,112 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-08-29 19:58:30,112 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 93 transitions, 605 flow [2023-08-29 19:58:30,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 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 19:58:30,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:30,113 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:30,123 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 19:58:30,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:30,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:58:30,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:30,324 INFO L85 PathProgramCache]: Analyzing trace with hash 123808757, now seen corresponding path program 3 times [2023-08-29 19:58:30,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:30,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71940664] [2023-08-29 19:58:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:30,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71940664] [2023-08-29 19:58:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71940664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578435950] [2023-08-29 19:58:30,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:30,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:30,424 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 19:58:30,425 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 19:58:30,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:58:30,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:58:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:30,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578435950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:30,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:30,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-29 19:58:30,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231442537] [2023-08-29 19:58:30,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:58:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:58:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:58:30,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 225 [2023-08-29 19:58:30,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 93 transitions, 605 flow. Second operand has 24 states, 24 states have (on average 75.125) internal successors, (1803), 24 states have internal predecessors, (1803), 0 states have call successors, (0), 0 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 19:58:30,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:30,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 225 [2023-08-29 19:58:30,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:32,775 INFO L130 PetriNetUnfolder]: 6612/13029 cut-off events. [2023-08-29 19:58:32,775 INFO L131 PetriNetUnfolder]: For 10995/10995 co-relation queries the response was YES. [2023-08-29 19:58:32,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41797 conditions, 13029 events. 6612/13029 cut-off events. For 10995/10995 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 118033 event pairs, 61 based on Foata normal form. 156/13182 useless extension candidates. Maximal degree in co-relation 41778. Up to 3162 conditions per place. [2023-08-29 19:58:32,821 INFO L137 encePairwiseOnDemand]: 207/225 looper letters, 0 selfloop transitions, 0 changer transitions 211/211 dead transitions. [2023-08-29 19:58:32,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 1649 flow [2023-08-29 19:58:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:58:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:58:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1231 transitions. [2023-08-29 19:58:32,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36474074074074075 [2023-08-29 19:58:32,823 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1231 transitions. [2023-08-29 19:58:32,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1231 transitions. [2023-08-29 19:58:32,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:32,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1231 transitions. [2023-08-29 19:58:32,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 82.06666666666666) internal successors, (1231), 15 states have internal predecessors, (1231), 0 states have call successors, (0), 0 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 19:58:32,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 225.0) internal successors, (3600), 16 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 19:58:32,830 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 225.0) internal successors, (3600), 16 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 19:58:32,830 INFO L175 Difference]: Start difference. First operand has 79 places, 93 transitions, 605 flow. Second operand 15 states and 1231 transitions. [2023-08-29 19:58:32,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 1649 flow [2023-08-29 19:58:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 211 transitions, 1575 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-29 19:58:32,895 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2023-08-29 19:58:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=87, PETRI_TRANSITIONS=0} [2023-08-29 19:58:32,895 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 24 predicate places. [2023-08-29 19:58:32,895 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2023-08-29 19:58:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.125) internal successors, (1803), 24 states have internal predecessors, (1803), 0 states have call successors, (0), 0 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 19:58:32,896 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-29 19:58:32,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-29 19:58:32,898 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-29 19:58:32,898 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-08-29 19:58:32,898 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 10 remaining) [2023-08-29 19:58:32,908 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 19:58:33,103 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,SelfDestructingSolverStorable34 [2023-08-29 19:58:33,104 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-29 19:58:33,104 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:58:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 364 flow [2023-08-29 19:58:33,117 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-29 19:58:33,118 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:58:33,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 173 events. 16/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-08-29 19:58:33,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 364 flow [2023-08-29 19:58:33,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 105 transitions, 245 flow [2023-08-29 19:58:33,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:33,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 105 transitions, 245 flow [2023-08-29 19:58:33,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 105 transitions, 245 flow [2023-08-29 19:58:33,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 245 flow [2023-08-29 19:58:33,133 INFO L130 PetriNetUnfolder]: 16/171 cut-off events. [2023-08-29 19:58:33,133 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:58:33,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 171 events. 16/171 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 417 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-29 19:58:33,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 5472 [2023-08-29 19:58:34,242 INFO L134 LiptonReduction]: Checked pairs total: 17622 [2023-08-29 19:58:34,242 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-29 19:58:34,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:58:34,243 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:34,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 19:58:34,248 INFO L130 PetriNetUnfolder]: 5/76 cut-off events. [2023-08-29 19:58:34,248 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:58:34,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:34,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:34,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:58:34,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1313274074, now seen corresponding path program 1 times [2023-08-29 19:58:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:34,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601208000] [2023-08-29 19:58:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:34,268 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:58:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:58:34,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:58:34,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:58:34,277 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 19:58:34,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 19:58:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 19:58:34,277 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:58:34,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 19:58:34,278 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:58:34,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 19:58:34,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:58:34,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 177 transitions, 444 flow [2023-08-29 19:58:34,316 INFO L130 PetriNetUnfolder]: 19/203 cut-off events. [2023-08-29 19:58:34,316 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:58:34,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 203 events. 19/203 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 230. Up to 12 conditions per place. [2023-08-29 19:58:34,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 177 transitions, 444 flow [2023-08-29 19:58:34,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 120 transitions, 288 flow [2023-08-29 19:58:34,318 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:58:34,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 120 transitions, 288 flow [2023-08-29 19:58:34,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 120 transitions, 288 flow [2023-08-29 19:58:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 120 transitions, 288 flow [2023-08-29 19:58:34,334 INFO L130 PetriNetUnfolder]: 19/203 cut-off events. [2023-08-29 19:58:34,334 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:58:34,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 203 events. 19/203 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2023-08-29 19:58:34,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 7490 [2023-08-29 19:58:35,561 INFO L134 LiptonReduction]: Checked pairs total: 25924 [2023-08-29 19:58:35,561 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-29 19:58:35,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:58:35,562 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:58:35,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-29 19:58:35,563 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:58:35,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:58:35,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:35,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:58:35,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:58:35,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1530, now seen corresponding path program 1 times [2023-08-29 19:58:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676757139] [2023-08-29 19:58:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:35,569 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 19:58:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676757139] [2023-08-29 19:58:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676757139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:35,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:35,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:58:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750254379] [2023-08-29 19:58:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:58:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:58:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:58:35,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 256 [2023-08-29 19:58:35,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:58:35,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:35,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 256 [2023-08-29 19:58:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:38,285 INFO L130 PetriNetUnfolder]: 27479/42334 cut-off events. [2023-08-29 19:58:38,285 INFO L131 PetriNetUnfolder]: For 8710/8710 co-relation queries the response was YES. [2023-08-29 19:58:38,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79461 conditions, 42334 events. 27479/42334 cut-off events. For 8710/8710 co-relation queries the response was YES. Maximal size of possible extension queue 1676. Compared 329546 event pairs, 17958 based on Foata normal form. 1335/40911 useless extension candidates. Maximal degree in co-relation 79447. Up to 32826 conditions per place. [2023-08-29 19:58:38,729 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 24 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-08-29 19:58:38,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 206 flow [2023-08-29 19:58:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:58:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:58:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 265 transitions. [2023-08-29 19:58:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517578125 [2023-08-29 19:58:38,730 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 265 transitions. [2023-08-29 19:58:38,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 265 transitions. [2023-08-29 19:58:38,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:38,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 265 transitions. [2023-08-29 19:58:38,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 19:58:38,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 19:58:38,736 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 19:58:38,737 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 180 flow. Second operand 2 states and 265 transitions. [2023-08-29 19:58:38,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 206 flow [2023-08-29 19:58:38,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 185 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:38,748 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 137 flow [2023-08-29 19:58:38,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-29 19:58:38,749 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-08-29 19:58:38,749 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 137 flow [2023-08-29 19:58:38,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:58:38,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:38,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:38,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-29 19:58:38,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:58:38,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 46922242, now seen corresponding path program 1 times [2023-08-29 19:58:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:38,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441350962] [2023-08-29 19:58:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:38,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:38,768 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 19:58:38,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:38,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441350962] [2023-08-29 19:58:38,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441350962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:38,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:38,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:38,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293826709] [2023-08-29 19:58:38,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:38,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:38,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:38,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:38,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:38,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 256 [2023-08-29 19:58:38,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 19:58:38,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:38,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 256 [2023-08-29 19:58:38,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:40,907 INFO L130 PetriNetUnfolder]: 19941/31404 cut-off events. [2023-08-29 19:58:40,907 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-08-29 19:58:40,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57017 conditions, 31404 events. 19941/31404 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 241876 event pairs, 12972 based on Foata normal form. 0/29780 useless extension candidates. Maximal degree in co-relation 57009. Up to 23831 conditions per place. [2023-08-29 19:58:41,085 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 22 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-29 19:58:41,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 181 flow [2023-08-29 19:58:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-29 19:58:41,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-08-29 19:58:41,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-29 19:58:41,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-29 19:58:41,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:41,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-29 19:58:41,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:58:41,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:58:41,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:58:41,090 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 137 flow. Second operand 3 states and 345 transitions. [2023-08-29 19:58:41,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 181 flow [2023-08-29 19:58:41,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:58:41,092 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 137 flow [2023-08-29 19:58:41,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-29 19:58:41,093 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-29 19:58:41,093 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 137 flow [2023-08-29 19:58:41,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 19:58:41,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:41,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:58:41,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-29 19:58:41,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:58:41,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 46922240, now seen corresponding path program 1 times [2023-08-29 19:58:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:41,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467915263] [2023-08-29 19:58:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:41,125 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 19:58:41,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467915263] [2023-08-29 19:58:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467915263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:41,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193654961] [2023-08-29 19:58:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:41,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:41,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:41,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 256 [2023-08-29 19:58:41,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 19:58:41,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:41,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 256 [2023-08-29 19:58:41,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:42,534 INFO L130 PetriNetUnfolder]: 12403/20474 cut-off events. [2023-08-29 19:58:42,534 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-08-29 19:58:42,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37095 conditions, 20474 events. 12403/20474 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 157772 event pairs, 7986 based on Foata normal form. 0/19984 useless extension candidates. Maximal degree in co-relation 37086. Up to 14837 conditions per place. [2023-08-29 19:58:42,612 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 21 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 19:58:42,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 179 flow [2023-08-29 19:58:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:58:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:58:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-29 19:58:42,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596354166666667 [2023-08-29 19:58:42,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-29 19:58:42,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-29 19:58:42,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:42,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-29 19:58:42,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 19:58:42,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:58:42,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:58:42,614 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 137 flow. Second operand 3 states and 353 transitions. [2023-08-29 19:58:42,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 179 flow [2023-08-29 19:58:42,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:58:42,615 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 136 flow [2023-08-29 19:58:42,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-29 19:58:42,616 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-29 19:58:42,616 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 136 flow [2023-08-29 19:58:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 19:58:42,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:42,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:58:42,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 19:58:42,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:58:42,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1454495699, now seen corresponding path program 1 times [2023-08-29 19:58:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189586954] [2023-08-29 19:58:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:42,662 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 19:58:42,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189586954] [2023-08-29 19:58:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189586954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:58:42,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:58:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:58:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971124486] [2023-08-29 19:58:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:58:42,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:58:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:58:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:58:42,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 256 [2023-08-29 19:58:42,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 19:58:42,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:42,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 256 [2023-08-29 19:58:42,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:59,053 INFO L130 PetriNetUnfolder]: 210613/263761 cut-off events. [2023-08-29 19:58:59,053 INFO L131 PetriNetUnfolder]: For 11823/11823 co-relation queries the response was YES. [2023-08-29 19:58:59,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525732 conditions, 263761 events. 210613/263761 cut-off events. For 11823/11823 co-relation queries the response was YES. Maximal size of possible extension queue 6632. Compared 1563254 event pairs, 77396 based on Foata normal form. 127/256083 useless extension candidates. Maximal degree in co-relation 525723. Up to 248555 conditions per place. [2023-08-29 19:59:00,503 INFO L137 encePairwiseOnDemand]: 248/256 looper letters, 43 selfloop transitions, 6 changer transitions 1/70 dead transitions. [2023-08-29 19:59:00,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 290 flow [2023-08-29 19:59:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:59:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:59:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-29 19:59:00,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-29 19:59:00,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-29 19:59:00,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-29 19:59:00,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:00,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-29 19:59:00,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 19:59:00,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:59:00,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:59:00,506 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 136 flow. Second operand 3 states and 352 transitions. [2023-08-29 19:59:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 290 flow [2023-08-29 19:59:00,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:59:00,532 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 173 flow [2023-08-29 19:59:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-29 19:59:00,532 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2023-08-29 19:59:00,532 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 173 flow [2023-08-29 19:59:00,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 19:59:00,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:00,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:00,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-29 19:59:00,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:59:00,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash -924873515, now seen corresponding path program 1 times [2023-08-29 19:59:00,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363590012] [2023-08-29 19:59:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:00,561 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 19:59:00,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363590012] [2023-08-29 19:59:00,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363590012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:00,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:00,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:59:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261708768] [2023-08-29 19:59:00,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:00,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:59:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:59:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:59:00,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 256 [2023-08-29 19:59:00,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 19:59:00,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:00,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 256 [2023-08-29 19:59:00,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:00,978 INFO L130 PetriNetUnfolder]: 1396/4417 cut-off events. [2023-08-29 19:59:00,979 INFO L131 PetriNetUnfolder]: For 644/644 co-relation queries the response was YES. [2023-08-29 19:59:00,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8043 conditions, 4417 events. 1396/4417 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 38689 event pairs, 287 based on Foata normal form. 2922/7306 useless extension candidates. Maximal degree in co-relation 8033. Up to 1547 conditions per place. [2023-08-29 19:59:00,994 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 17 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-08-29 19:59:00,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 268 flow [2023-08-29 19:59:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:59:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:59:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-29 19:59:00,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908854166666667 [2023-08-29 19:59:00,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-29 19:59:00,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-29 19:59:00,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:00,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-29 19:59:00,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 19:59:00,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:59:00,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 19:59:00,997 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 173 flow. Second operand 3 states and 377 transitions. [2023-08-29 19:59:00,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 268 flow [2023-08-29 19:59:00,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:59:00,999 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 191 flow [2023-08-29 19:59:00,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-29 19:59:00,999 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2023-08-29 19:59:01,000 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 191 flow [2023-08-29 19:59:01,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 19:59:01,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:01,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:01,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-29 19:59:01,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:59:01,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1106241307, now seen corresponding path program 1 times [2023-08-29 19:59:01,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:01,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750119387] [2023-08-29 19:59:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:01,059 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 19:59:01,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:01,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750119387] [2023-08-29 19:59:01,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750119387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:01,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:01,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:59:01,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797579853] [2023-08-29 19:59:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:59:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:59:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:59:01,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 256 [2023-08-29 19:59:01,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 19:59:01,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:01,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 256 [2023-08-29 19:59:01,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:01,640 INFO L130 PetriNetUnfolder]: 3609/7758 cut-off events. [2023-08-29 19:59:01,640 INFO L131 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2023-08-29 19:59:01,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20030 conditions, 7758 events. 3609/7758 cut-off events. For 2987/2987 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 67996 event pairs, 117 based on Foata normal form. 30/7784 useless extension candidates. Maximal degree in co-relation 20020. Up to 5666 conditions per place. [2023-08-29 19:59:01,677 INFO L137 encePairwiseOnDemand]: 239/256 looper letters, 78 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2023-08-29 19:59:01,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 113 transitions, 629 flow [2023-08-29 19:59:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:59:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:59:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 622 transitions. [2023-08-29 19:59:01,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049479166666667 [2023-08-29 19:59:01,679 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 622 transitions. [2023-08-29 19:59:01,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 622 transitions. [2023-08-29 19:59:01,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:01,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 622 transitions. [2023-08-29 19:59:01,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 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 19:59:01,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 256.0) internal successors, (1792), 7 states have internal predecessors, (1792), 0 states have call successors, (0), 0 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 19:59:01,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 256.0) internal successors, (1792), 7 states have internal predecessors, (1792), 0 states have call successors, (0), 0 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 19:59:01,681 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 191 flow. Second operand 6 states and 622 transitions. [2023-08-29 19:59:01,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 113 transitions, 629 flow [2023-08-29 19:59:01,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 113 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:59:01,689 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 323 flow [2023-08-29 19:59:01,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-29 19:59:01,689 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-29 19:59:01,689 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 323 flow [2023-08-29 19:59:01,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 19:59:01,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:01,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-29 19:59:01,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:59:01,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -552654064, now seen corresponding path program 2 times [2023-08-29 19:59:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696286848] [2023-08-29 19:59:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:01,752 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 19:59:01,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:01,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696286848] [2023-08-29 19:59:01,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696286848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:01,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865953047] [2023-08-29 19:59:01,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:59:01,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:01,757 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 19:59:01,760 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 19:59:01,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:59:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:59:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:59:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:59:01,935 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 19:59:01,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:59:02,003 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 19:59:02,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865953047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:59:02,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:59:02,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-29 19:59:02,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790260777] [2023-08-29 19:59:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:59:02,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 19:59:02,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 19:59:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-08-29 19:59:02,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 256 [2023-08-29 19:59:02,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 323 flow. Second operand has 20 states, 20 states have (on average 88.85) internal successors, (1777), 20 states have internal predecessors, (1777), 0 states have call successors, (0), 0 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 19:59:02,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:02,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 256 [2023-08-29 19:59:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:03,614 INFO L130 PetriNetUnfolder]: 5880/11784 cut-off events. [2023-08-29 19:59:03,614 INFO L131 PetriNetUnfolder]: For 5362/5362 co-relation queries the response was YES. [2023-08-29 19:59:03,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 11784 events. 5880/11784 cut-off events. For 5362/5362 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 108254 event pairs, 77 based on Foata normal form. 70/11850 useless extension candidates. Maximal degree in co-relation 32665. Up to 6521 conditions per place. [2023-08-29 19:59:03,807 INFO L137 encePairwiseOnDemand]: 234/256 looper letters, 122 selfloop transitions, 46 changer transitions 0/178 dead transitions. [2023-08-29 19:59:03,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 178 transitions, 1122 flow [2023-08-29 19:59:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:59:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:59:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1115 transitions. [2023-08-29 19:59:03,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39595170454545453 [2023-08-29 19:59:03,809 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1115 transitions. [2023-08-29 19:59:03,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1115 transitions. [2023-08-29 19:59:03,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:03,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1115 transitions. [2023-08-29 19:59:03,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.36363636363636) internal successors, (1115), 11 states have internal predecessors, (1115), 0 states have call successors, (0), 0 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 19:59:03,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 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 19:59:03,818 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 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 19:59:03,818 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 323 flow. Second operand 11 states and 1115 transitions. [2023-08-29 19:59:03,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 178 transitions, 1122 flow [2023-08-29 19:59:03,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 178 transitions, 1100 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 19:59:03,838 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 581 flow [2023-08-29 19:59:03,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=581, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-08-29 19:59:03,838 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 13 predicate places. [2023-08-29 19:59:03,839 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 581 flow [2023-08-29 19:59:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 88.85) internal successors, (1777), 20 states have internal predecessors, (1777), 0 states have call successors, (0), 0 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 19:59:03,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:03,839 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:03,845 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 19:59:04,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:04,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-29 19:59:04,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1649914085, now seen corresponding path program 3 times [2023-08-29 19:59:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237465236] [2023-08-29 19:59:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:04,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237465236] [2023-08-29 19:59:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237465236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033701117] [2023-08-29 19:59:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:59:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:04,186 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 19:59:04,199 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 19:59:04,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:59:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:59:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:59:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:59:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:59:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033701117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:59:04,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:59:04,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-29 19:59:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222439679] [2023-08-29 19:59:04,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:59:04,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 19:59:04,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 19:59:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-08-29 19:59:04,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 256 [2023-08-29 19:59:04,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 581 flow. Second operand has 27 states, 27 states have (on average 83.77777777777777) internal successors, (2262), 27 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 19:59:04,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:04,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 256 [2023-08-29 19:59:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:07,821 INFO L130 PetriNetUnfolder]: 12140/24027 cut-off events. [2023-08-29 19:59:07,822 INFO L131 PetriNetUnfolder]: For 20257/20257 co-relation queries the response was YES. [2023-08-29 19:59:07,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 24027 events. 12140/24027 cut-off events. For 20257/20257 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 237932 event pairs, 85 based on Foata normal form. 342/24365 useless extension candidates. Maximal degree in co-relation 76922. Up to 5878 conditions per place. [2023-08-29 19:59:07,898 INFO L137 encePairwiseOnDemand]: 234/256 looper letters, 0 selfloop transitions, 0 changer transitions 230/230 dead transitions. [2023-08-29 19:59:07,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 230 transitions, 1734 flow [2023-08-29 19:59:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:59:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:59:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1399 transitions. [2023-08-29 19:59:07,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36432291666666666 [2023-08-29 19:59:07,900 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1399 transitions. [2023-08-29 19:59:07,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1399 transitions. [2023-08-29 19:59:07,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:07,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1399 transitions. [2023-08-29 19:59:07,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.26666666666667) internal successors, (1399), 15 states have internal predecessors, (1399), 0 states have call successors, (0), 0 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 19:59:07,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 256.0) internal successors, (4096), 16 states have internal predecessors, (4096), 0 states have call successors, (0), 0 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 19:59:07,905 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 256.0) internal successors, (4096), 16 states have internal predecessors, (4096), 0 states have call successors, (0), 0 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 19:59:07,905 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 581 flow. Second operand 15 states and 1399 transitions. [2023-08-29 19:59:07,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 230 transitions, 1734 flow [2023-08-29 19:59:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 230 transitions, 1652 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-29 19:59:08,013 INFO L231 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2023-08-29 19:59:08,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2023-08-29 19:59:08,014 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 21 predicate places. [2023-08-29 19:59:08,014 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2023-08-29 19:59:08,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.77777777777777) internal successors, (2262), 27 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 19:59:08,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-29 19:59:08,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-08-29 19:59:08,016 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-29 19:59:08,016 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2023-08-29 19:59:08,016 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-29 19:59:08,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-29 19:59:08,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-29 19:59:08,230 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-29 19:59:08,230 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:59:08,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 177 transitions, 444 flow [2023-08-29 19:59:08,243 INFO L130 PetriNetUnfolder]: 19/203 cut-off events. [2023-08-29 19:59:08,243 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:59:08,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 203 events. 19/203 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 230. Up to 12 conditions per place. [2023-08-29 19:59:08,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 177 transitions, 444 flow [2023-08-29 19:59:08,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 118 transitions, 284 flow [2023-08-29 19:59:08,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:59:08,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 118 transitions, 284 flow [2023-08-29 19:59:08,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 118 transitions, 284 flow [2023-08-29 19:59:08,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 118 transitions, 284 flow [2023-08-29 19:59:08,254 INFO L130 PetriNetUnfolder]: 19/201 cut-off events. [2023-08-29 19:59:08,254 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:59:08,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 201 events. 19/201 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 503 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2023-08-29 19:59:08,258 INFO L119 LiptonReduction]: Number of co-enabled transitions 7490 [2023-08-29 19:59:09,297 INFO L134 LiptonReduction]: Checked pairs total: 25924 [2023-08-29 19:59:09,297 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-29 19:59:09,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:59:09,298 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:59:09,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 19:59:09,304 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2023-08-29 19:59:09,304 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:59:09,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:09,304 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:09,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:59:09,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:09,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1103967895, now seen corresponding path program 1 times [2023-08-29 19:59:09,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:09,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97648999] [2023-08-29 19:59:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:59:09,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:59:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:59:09,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:59:09,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:59:09,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 19:59:09,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 19:59:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-29 19:59:09,325 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:59:09,325 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 19:59:09,326 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:59:09,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-29 19:59:09,350 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:59:09,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 204 transitions, 528 flow [2023-08-29 19:59:09,366 INFO L130 PetriNetUnfolder]: 22/233 cut-off events. [2023-08-29 19:59:09,366 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:59:09,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 233 events. 22/233 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 578 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 268. Up to 14 conditions per place. [2023-08-29 19:59:09,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 204 transitions, 528 flow [2023-08-29 19:59:09,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 133 transitions, 329 flow [2023-08-29 19:59:09,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:59:09,369 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 133 transitions, 329 flow [2023-08-29 19:59:09,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 133 transitions, 329 flow [2023-08-29 19:59:09,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 133 transitions, 329 flow [2023-08-29 19:59:09,382 INFO L130 PetriNetUnfolder]: 22/233 cut-off events. [2023-08-29 19:59:09,382 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:59:09,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 233 events. 22/233 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 576 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 244. Up to 14 conditions per place. [2023-08-29 19:59:09,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 9820 [2023-08-29 19:59:10,598 INFO L134 LiptonReduction]: Checked pairs total: 33889 [2023-08-29 19:59:10,598 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-29 19:59:10,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:59:10,600 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;@29a35d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:59:10,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 19:59:10,600 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:59:10,600 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:59:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:59:10,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 9 more)] === [2023-08-29 19:59:10,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1913, now seen corresponding path program 1 times [2023-08-29 19:59:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122378583] [2023-08-29 19:59:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:10,605 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 19:59:10,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122378583] [2023-08-29 19:59:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122378583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:59:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544108448] [2023-08-29 19:59:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:10,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:59:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:59:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:59:10,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 287 [2023-08-29 19:59:10,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 213 flow. Second operand has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 19:59:10,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:10,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 287 [2023-08-29 19:59:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:20,881 INFO L130 PetriNetUnfolder]: 98432/143100 cut-off events. [2023-08-29 19:59:20,881 INFO L131 PetriNetUnfolder]: For 38516/38516 co-relation queries the response was YES. [2023-08-29 19:59:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272888 conditions, 143100 events. 98432/143100 cut-off events. For 38516/38516 co-relation queries the response was YES. Maximal size of possible extension queue 4850. Compared 1148324 event pairs, 64530 based on Foata normal form. 0/134840 useless extension candidates. Maximal degree in co-relation 272873. Up to 114470 conditions per place. [2023-08-29 19:59:22,104 INFO L137 encePairwiseOnDemand]: 275/287 looper letters, 27 selfloop transitions, 0 changer transitions 0/62 dead transitions. [2023-08-29 19:59:22,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 241 flow [2023-08-29 19:59:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:59:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:59:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2023-08-29 19:59:22,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209059233449478 [2023-08-29 19:59:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2023-08-29 19:59:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2023-08-29 19:59:22,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:22,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2023-08-29 19:59:22,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 19:59:22,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 19:59:22,106 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 19:59:22,106 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 213 flow. Second operand 2 states and 299 transitions. [2023-08-29 19:59:22,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 241 flow [2023-08-29 19:59:22,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 210 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-29 19:59:22,121 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 156 flow [2023-08-29 19:59:22,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-29 19:59:22,122 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -12 predicate places. [2023-08-29 19:59:22,122 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 156 flow [2023-08-29 19:59:22,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 19:59:22,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:22,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:59:22,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-29 19:59:22,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 9 more)] === [2023-08-29 19:59:22,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 58706838, now seen corresponding path program 1 times [2023-08-29 19:59:22,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:22,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924979466] [2023-08-29 19:59:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:22,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:22,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924979466] [2023-08-29 19:59:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924979466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:22,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:22,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:59:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134611529] [2023-08-29 19:59:22,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:22,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:59:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:59:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:59:22,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 287 [2023-08-29 19:59:22,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 19:59:22,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:22,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 287 [2023-08-29 19:59:22,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:29,545 INFO L130 PetriNetUnfolder]: 71455/105927 cut-off events. [2023-08-29 19:59:29,545 INFO L131 PetriNetUnfolder]: For 3392/3392 co-relation queries the response was YES. [2023-08-29 19:59:29,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194394 conditions, 105927 events. 71455/105927 cut-off events. For 3392/3392 co-relation queries the response was YES. Maximal size of possible extension queue 3619. Compared 849077 event pairs, 46666 based on Foata normal form. 0/101068 useless extension candidates. Maximal degree in co-relation 194385. Up to 83120 conditions per place. [2023-08-29 19:59:30,297 INFO L137 encePairwiseOnDemand]: 285/287 looper letters, 25 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-29 19:59:30,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 206 flow [2023-08-29 19:59:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:59:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:59:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-29 19:59:30,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2023-08-29 19:59:30,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-29 19:59:30,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-29 19:59:30,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:30,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-29 19:59:30,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 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 19:59:30,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 19:59:30,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 19:59:30,301 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 156 flow. Second operand 3 states and 402 transitions. [2023-08-29 19:59:30,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 206 flow [2023-08-29 19:59:30,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:59:30,302 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 156 flow [2023-08-29 19:59:30,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2023-08-29 19:59:30,303 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2023-08-29 19:59:30,303 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 156 flow [2023-08-29 19:59:30,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 19:59:30,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:30,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:59:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-29 19:59:30,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 9 more)] === [2023-08-29 19:59:30,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 58706839, now seen corresponding path program 1 times [2023-08-29 19:59:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:30,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970880361] [2023-08-29 19:59:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:30,319 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 19:59:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970880361] [2023-08-29 19:59:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970880361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:59:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83937551] [2023-08-29 19:59:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:59:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:59:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:59:30,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 287 [2023-08-29 19:59:30,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 19:59:30,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:30,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 287 [2023-08-29 19:59:30,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:35,262 INFO L130 PetriNetUnfolder]: 44478/68754 cut-off events. [2023-08-29 19:59:35,262 INFO L131 PetriNetUnfolder]: For 3392/3392 co-relation queries the response was YES. [2023-08-29 19:59:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125874 conditions, 68754 events. 44478/68754 cut-off events. For 3392/3392 co-relation queries the response was YES. Maximal size of possible extension queue 2408. Compared 558098 event pairs, 28802 based on Foata normal form. 0/67296 useless extension candidates. Maximal degree in co-relation 125864. Up to 51771 conditions per place. [2023-08-29 19:59:35,673 INFO L137 encePairwiseOnDemand]: 285/287 looper letters, 24 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-29 19:59:35,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 204 flow [2023-08-29 19:59:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:59:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:59:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-29 19:59:35,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-08-29 19:59:35,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-29 19:59:35,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-29 19:59:35,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:35,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-29 19:59:35,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 19:59:35,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 19:59:35,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 19:59:35,676 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 156 flow. Second operand 3 states and 392 transitions. [2023-08-29 19:59:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 204 flow [2023-08-29 19:59:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:59:35,678 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 155 flow [2023-08-29 19:59:35,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-29 19:59:35,678 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2023-08-29 19:59:35,679 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 155 flow [2023-08-29 19:59:35,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 19:59:35,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:35,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:59:35,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-29 19:59:35,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 9 more)] === [2023-08-29 19:59:35,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1819797599, now seen corresponding path program 1 times [2023-08-29 19:59:35,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:35,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529762233] [2023-08-29 19:59:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:35,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:35,694 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 19:59:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529762233] [2023-08-29 19:59:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529762233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:59:35,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:59:35,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:59:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923623230] [2023-08-29 19:59:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:59:35,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:59:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:59:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:59:35,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 287 [2023-08-29 19:59:35,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 19:59:35,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:35,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 287 [2023-08-29 19:59:35,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand