./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_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/39_rand_lock_p0_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 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --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 20:04:57,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:04:57,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:04:57,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:04:57,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:04:57,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:04:57,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:04:57,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:04:57,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:04:57,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:04:57,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:04:57,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:04:57,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:04:57,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:04:57,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:04:57,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:04:57,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:04:57,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:04:57,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:04:57,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:04:57,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:04:57,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:04:57,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:04:57,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:04:57,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:04:57,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:04:57,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:04:57,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:04:57,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:04:57,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:04:57,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:04:57,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:04:57,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:04:57,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:04:57,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:04:57,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:04:57,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:04:57,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:04:57,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:04:57,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:04:57,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:04:57,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 20:04:57,347 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:04:57,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:04:57,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:04:57,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:04:57,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:04:57,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:04:57,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:04:57,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:04:57,350 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:04:57,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:04:57,351 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:04:57,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:04:57,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:04:57,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:04:57,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:04:57,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:04:57,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:04:57,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 20:04:57,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 20:04:57,354 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:04:57,354 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:04:57,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:04:57,354 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:04:57,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:04:57,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:04:57,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:04:57,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:04:57,602 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:04:57,602 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:04:57,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-08-29 20:04:58,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:04:58,670 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:04:58,671 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-08-29 20:04:58,686 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73115fc55/af70ebeb13b243d5ae2df053bb4e405e/FLAG793bb4b0e [2023-08-29 20:04:58,701 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73115fc55/af70ebeb13b243d5ae2df053bb4e405e [2023-08-29 20:04:58,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:04:58,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:04:58,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:04:58,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:04:58,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:04:58,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:04:58" (1/1) ... [2023-08-29 20:04:58,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24dd261f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:58, skipping insertion in model container [2023-08-29 20:04:58,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:04:58" (1/1) ... [2023-08-29 20:04:58,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:04:58,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:04:58,894 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:04:59,000 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/39_rand_lock_p0_vs.i[30959,30972] [2023-08-29 20:04:59,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:04:59,015 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 20:04:59,033 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:04:59,046 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/39_rand_lock_p0_vs.i[30959,30972] [2023-08-29 20:04:59,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:04:59,078 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:04:59,078 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:04:59,078 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:04:59,083 INFO L208 MainTranslator]: Completed translation [2023-08-29 20:04:59,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59 WrapperNode [2023-08-29 20:04:59,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:04:59,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 20:04:59,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 20:04:59,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 20:04:59,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,137 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 76 [2023-08-29 20:04:59,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 20:04:59,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 20:04:59,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 20:04:59,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 20:04:59,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 20:04:59,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 20:04:59,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 20:04:59,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 20:04:59,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (1/1) ... [2023-08-29 20:04:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:04:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:04:59,193 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 20:04:59,199 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 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 20:04:59,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 20:04:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 20:04:59,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 20:04:59,218 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 20:04:59,295 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 20:04:59,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 20:04:59,441 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 20:04:59,464 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 20:04:59,464 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 20:04:59,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:04:59 BoogieIcfgContainer [2023-08-29 20:04:59,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 20:04:59,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 20:04:59,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 20:04:59,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 20:04:59,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:04:58" (1/3) ... [2023-08-29 20:04:59,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173ad3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:04:59, skipping insertion in model container [2023-08-29 20:04:59,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:04:59" (2/3) ... [2023-08-29 20:04:59,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173ad3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:04:59, skipping insertion in model container [2023-08-29 20:04:59,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:04:59" (3/3) ... [2023-08-29 20:04:59,470 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-08-29 20:04:59,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 20:04:59,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-29 20:04:59,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 20:04:59,523 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:04:59,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,584 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 20:04:59,585 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:04:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-29 20:04:59,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:04:59,603 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:04:59,617 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 20:04:59,617 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:04:59,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-29 20:04:59,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-08-29 20:05:01,039 INFO L134 LiptonReduction]: Checked pairs total: 1114 [2023-08-29 20:05:01,039 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-29 20:05:01,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:05:01,052 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:01,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-29 20:05:01,053 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:05:01,056 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:01,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:01,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:05:01,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash 10864, now seen corresponding path program 1 times [2023-08-29 20:05:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:01,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237637035] [2023-08-29 20:05:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:01,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:01,161 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 20:05:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237637035] [2023-08-29 20:05:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237637035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:01,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:01,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:01,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747811341] [2023-08-29 20:05:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:05:01,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:05:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:05:01,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 136 [2023-08-29 20:05:01,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 13 transitions, 31 flow. Second operand has 2 states, 2 states have (on average 61.0) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:01,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 136 [2023-08-29 20:05:01,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:01,210 INFO L130 PetriNetUnfolder]: 17/42 cut-off events. [2023-08-29 20:05:01,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 42 events. 17/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 96 event pairs, 12 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 72. Up to 42 conditions per place. [2023-08-29 20:05:01,213 INFO L137 encePairwiseOnDemand]: 134/136 looper letters, 10 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-08-29 20:05:01,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 11 transitions, 47 flow [2023-08-29 20:05:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:05:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:05:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2023-08-29 20:05:01,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-08-29 20:05:01,222 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 132 transitions. [2023-08-29 20:05:01,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 132 transitions. [2023-08-29 20:05:01,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:01,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 132 transitions. [2023-08-29 20:05:01,229 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 20:05:01,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,232 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,233 INFO L175 Difference]: Start difference. First operand has 15 places, 13 transitions, 31 flow. Second operand 2 states and 132 transitions. [2023-08-29 20:05:01,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 11 transitions, 47 flow [2023-08-29 20:05:01,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:01,236 INFO L231 Difference]: Finished difference. Result has 14 places, 11 transitions, 27 flow [2023-08-29 20:05:01,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=27, PETRI_PLACES=14, PETRI_TRANSITIONS=11} [2023-08-29 20:05:01,240 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -1 predicate places. [2023-08-29 20:05:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 11 transitions, 27 flow [2023-08-29 20:05:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 61.0) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:01,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 20:05:01,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:05:01,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 10860, now seen corresponding path program 1 times [2023-08-29 20:05:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619197108] [2023-08-29 20:05:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:01,331 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 20:05:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619197108] [2023-08-29 20:05:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619197108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:01,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236248753] [2023-08-29 20:05:01,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:01,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-08-29 20:05:01,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 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 20:05:01,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:01,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-08-29 20:05:01,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:01,366 INFO L130 PetriNetUnfolder]: 13/33 cut-off events. [2023-08-29 20:05:01,366 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 33 events. 13/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 69 event pairs, 9 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 68. Up to 32 conditions per place. [2023-08-29 20:05:01,367 INFO L137 encePairwiseOnDemand]: 134/136 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-08-29 20:05:01,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 43 flow [2023-08-29 20:05:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-08-29 20:05:01,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2023-08-29 20:05:01,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-08-29 20:05:01,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-08-29 20:05:01,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:01,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-08-29 20:05:01,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,371 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 172 transitions. [2023-08-29 20:05:01,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 43 flow [2023-08-29 20:05:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:01,372 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 27 flow [2023-08-29 20:05:01,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2023-08-29 20:05:01,372 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 0 predicate places. [2023-08-29 20:05:01,373 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 27 flow [2023-08-29 20:05:01,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 20:05:01,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:01,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 20:05:01,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:05:01,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash 10858, now seen corresponding path program 1 times [2023-08-29 20:05:01,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875664899] [2023-08-29 20:05:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:01,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:01,439 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 20:05:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875664899] [2023-08-29 20:05:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875664899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:01,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686408351] [2023-08-29 20:05:01,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:01,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2023-08-29 20:05:01,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 10 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:01,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2023-08-29 20:05:01,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:01,467 INFO L130 PetriNetUnfolder]: 9/24 cut-off events. [2023-08-29 20:05:01,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 24 events. 9/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 41 event pairs, 6 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 51. Up to 23 conditions per place. [2023-08-29 20:05:01,468 INFO L137 encePairwiseOnDemand]: 134/136 looper letters, 4 selfloop transitions, 1 changer transitions 3/9 dead transitions. [2023-08-29 20:05:01,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 9 transitions, 41 flow [2023-08-29 20:05:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-08-29 20:05:01,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2023-08-29 20:05:01,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-08-29 20:05:01,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-08-29 20:05:01,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:01,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-08-29 20:05:01,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,471 INFO L175 Difference]: Start difference. First operand has 15 places, 10 transitions, 27 flow. Second operand 3 states and 174 transitions. [2023-08-29 20:05:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 9 transitions, 41 flow [2023-08-29 20:05:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 9 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:01,472 INFO L231 Difference]: Finished difference. Result has 15 places, 6 transitions, 20 flow [2023-08-29 20:05:01,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=15, PETRI_TRANSITIONS=6} [2023-08-29 20:05:01,473 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 0 predicate places. [2023-08-29 20:05:01,473 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 6 transitions, 20 flow [2023-08-29 20:05:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:01,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:05:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 20:05:01,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:05:01,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 10443338, now seen corresponding path program 1 times [2023-08-29 20:05:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335317758] [2023-08-29 20:05:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:01,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:01,497 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 20:05:01,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335317758] [2023-08-29 20:05:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335317758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:01,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:01,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:01,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766365042] [2023-08-29 20:05:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:01,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 136 [2023-08-29 20:05:01,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 6 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:01,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 136 [2023-08-29 20:05:01,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:01,506 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-29 20:05:01,506 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 3/9 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-29 20:05:01,507 INFO L137 encePairwiseOnDemand]: 134/136 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-29 20:05:01,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 5 transitions, 26 flow [2023-08-29 20:05:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-08-29 20:05:01,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387254901960784 [2023-08-29 20:05:01,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-08-29 20:05:01,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-08-29 20:05:01,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:01,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-08-29 20:05:01,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,510 INFO L175 Difference]: Start difference. First operand has 15 places, 6 transitions, 20 flow. Second operand 3 states and 179 transitions. [2023-08-29 20:05:01,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 5 transitions, 26 flow [2023-08-29 20:05:01,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 5 transitions, 25 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:01,511 INFO L231 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2023-08-29 20:05:01,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=13, PETRI_TRANSITIONS=0} [2023-08-29 20:05:01,511 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -2 predicate places. [2023-08-29 20:05:01,512 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2023-08-29 20:05:01,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:01,514 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-29 20:05:01,514 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2023-08-29 20:05:01,514 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-08-29 20:05:01,514 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-08-29 20:05:01,514 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-08-29 20:05:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 20:05:01,515 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:05:01,516 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:05:01,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,526 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 20:05:01,526 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-29 20:05:01,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,527 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:01,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 141 flow [2023-08-29 20:05:01,533 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 20:05:01,533 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:01,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-29 20:05:01,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-08-29 20:05:02,846 INFO L134 LiptonReduction]: Checked pairs total: 1126 [2023-08-29 20:05:02,846 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-29 20:05:02,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:05:02,849 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:02,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:05:02,851 INFO L130 PetriNetUnfolder]: 1/17 cut-off events. [2023-08-29 20:05:02,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:02,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:02,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 20:05:02,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:05:02,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash -870644566, now seen corresponding path program 1 times [2023-08-29 20:05:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609864845] [2023-08-29 20:05:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:02,872 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:05:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:02,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:05:02,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:05:02,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:05:02,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 20:05:02,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:05:02,893 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:05:02,893 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:05:02,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 20:05:02,906 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:05:02,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,920 INFO L130 PetriNetUnfolder]: 7/137 cut-off events. [2023-08-29 20:05:02,920 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:05:02,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 137 events. 7/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 20:05:02,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:02,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:02,931 INFO L130 PetriNetUnfolder]: 7/137 cut-off events. [2023-08-29 20:05:02,931 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:05:02,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 137 events. 7/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 20:05:02,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 5256 [2023-08-29 20:05:04,281 INFO L134 LiptonReduction]: Checked pairs total: 6282 [2023-08-29 20:05:04,281 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-29 20:05:04,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:05:04,283 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:04,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 20:05:04,285 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:05:04,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:04,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:04,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:04,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:05:04,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 20586, now seen corresponding path program 1 times [2023-08-29 20:05:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:04,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940171934] [2023-08-29 20:05:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:04,295 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 20:05:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940171934] [2023-08-29 20:05:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940171934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:04,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:04,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580351125] [2023-08-29 20:05:04,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:05:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:05:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:05:04,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-29 20:05:04,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 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 20:05:04,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:04,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-29 20:05:04,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:04,342 INFO L130 PetriNetUnfolder]: 372/617 cut-off events. [2023-08-29 20:05:04,342 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 20:05:04,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 617 events. 372/617 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3076 event pairs, 312 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 601 conditions per place. [2023-08-29 20:05:04,345 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-08-29 20:05:04,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 98 flow [2023-08-29 20:05:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:05:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:05:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 204 transitions. [2023-08-29 20:05:04,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2023-08-29 20:05:04,346 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 204 transitions. [2023-08-29 20:05:04,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 204 transitions. [2023-08-29 20:05:04,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:04,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 204 transitions. [2023-08-29 20:05:04,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 102.0) internal successors, (204), 2 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 20:05:04,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,348 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,349 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 2 states and 204 transitions. [2023-08-29 20:05:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 98 flow [2023-08-29 20:05:04,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 96 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:04,350 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 56 flow [2023-08-29 20:05:04,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-29 20:05:04,350 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2023-08-29 20:05:04,350 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 56 flow [2023-08-29 20:05:04,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 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 20:05:04,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:04,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:04,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 20:05:04,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:05:04,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash 20602, now seen corresponding path program 1 times [2023-08-29 20:05:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453522933] [2023-08-29 20:05:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:04,368 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 20:05:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453522933] [2023-08-29 20:05:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453522933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:04,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:04,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028282833] [2023-08-29 20:05:04,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:04,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:04,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:04,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 205 [2023-08-29 20:05:04,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:04,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 205 [2023-08-29 20:05:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:04,428 INFO L130 PetriNetUnfolder]: 267/455 cut-off events. [2023-08-29 20:05:04,428 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 20:05:04,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 455 events. 267/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2139 event pairs, 222 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 921. Up to 438 conditions per place. [2023-08-29 20:05:04,430 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-29 20:05:04,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 92 flow [2023-08-29 20:05:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-29 20:05:04,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2023-08-29 20:05:04,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-29 20:05:04,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-29 20:05:04,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:04,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-29 20:05:04,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,435 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 56 flow. Second operand 3 states and 275 transitions. [2023-08-29 20:05:04,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 92 flow [2023-08-29 20:05:04,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:04,436 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 56 flow [2023-08-29 20:05:04,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-29 20:05:04,438 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-08-29 20:05:04,441 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 56 flow [2023-08-29 20:05:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:04,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:04,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 20:05:04,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:05:04,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 20603, now seen corresponding path program 1 times [2023-08-29 20:05:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:04,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764786986] [2023-08-29 20:05:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:04,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:04,487 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 20:05:04,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764786986] [2023-08-29 20:05:04,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764786986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:04,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:04,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021289229] [2023-08-29 20:05:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:04,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:04,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:04,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-29 20:05:04,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:04,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-29 20:05:04,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:04,541 INFO L130 PetriNetUnfolder]: 162/293 cut-off events. [2023-08-29 20:05:04,541 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 20:05:04,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 293 events. 162/293 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1202 event pairs, 132 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 598. Up to 276 conditions per place. [2023-08-29 20:05:04,542 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-29 20:05:04,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 90 flow [2023-08-29 20:05:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-29 20:05:04,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-08-29 20:05:04,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-29 20:05:04,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-29 20:05:04,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:04,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-29 20:05:04,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 20:05:04,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,546 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 56 flow. Second operand 3 states and 280 transitions. [2023-08-29 20:05:04,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 90 flow [2023-08-29 20:05:04,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:04,548 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 55 flow [2023-08-29 20:05:04,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-29 20:05:04,548 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-08-29 20:05:04,549 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 55 flow [2023-08-29 20:05:04,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:04,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:05:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 20:05:04,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:05:04,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 19814329, now seen corresponding path program 1 times [2023-08-29 20:05:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:04,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214120056] [2023-08-29 20:05:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:04,577 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 20:05:04,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:04,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214120056] [2023-08-29 20:05:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214120056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:04,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:04,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:04,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764279255] [2023-08-29 20:05:04,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:04,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:04,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-29 20:05:04,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 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 20:05:04,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:04,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-29 20:05:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:04,616 INFO L130 PetriNetUnfolder]: 129/237 cut-off events. [2023-08-29 20:05:04,616 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:04,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 237 events. 129/237 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 951 event pairs, 47 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 486. Up to 125 conditions per place. [2023-08-29 20:05:04,618 INFO L137 encePairwiseOnDemand]: 200/205 looper letters, 17 selfloop transitions, 3 changer transitions 10/33 dead transitions. [2023-08-29 20:05:04,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 144 flow [2023-08-29 20:05:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-29 20:05:04,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813008130081301 [2023-08-29 20:05:04,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-29 20:05:04,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-29 20:05:04,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:04,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-29 20:05:04,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,621 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 55 flow. Second operand 3 states and 296 transitions. [2023-08-29 20:05:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 144 flow [2023-08-29 20:05:04,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:04,623 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 67 flow [2023-08-29 20:05:04,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-29 20:05:04,624 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-29 20:05:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 67 flow [2023-08-29 20:05:04,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 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 20:05:04,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:04,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:05:04,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 20:05:04,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:05:04,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:04,625 INFO L85 PathProgramCache]: Analyzing trace with hash 75610020, now seen corresponding path program 1 times [2023-08-29 20:05:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:04,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793118359] [2023-08-29 20:05:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:04,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:05:04,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:04,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793118359] [2023-08-29 20:05:04,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793118359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:04,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:04,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:05:04,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989922766] [2023-08-29 20:05:04,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:04,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:04,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:04,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-29 20:05:04,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:04,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-29 20:05:04,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:04,691 INFO L130 PetriNetUnfolder]: 109/201 cut-off events. [2023-08-29 20:05:04,691 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-29 20:05:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 201 events. 109/201 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 750 event pairs, 83 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 451. Up to 187 conditions per place. [2023-08-29 20:05:04,692 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-29 20:05:04,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 91 flow [2023-08-29 20:05:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-29 20:05:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2023-08-29 20:05:04,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-29 20:05:04,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-29 20:05:04,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:04,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-29 20:05:04,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,695 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 67 flow. Second operand 3 states and 282 transitions. [2023-08-29 20:05:04,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 91 flow [2023-08-29 20:05:04,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:05:04,696 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-29 20:05:04,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-29 20:05:04,697 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-08-29 20:05:04,697 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-29 20:05:04,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:04,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-08-29 20:05:04,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-29 20:05:04,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 20:05:04,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 6 remaining) [2023-08-29 20:05:04,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-29 20:05:04,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 20:05:04,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 20:05:04,698 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 20:05:04,699 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:05:04,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,712 INFO L130 PetriNetUnfolder]: 7/137 cut-off events. [2023-08-29 20:05:04,713 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:05:04,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 137 events. 7/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 20:05:04,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:04,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 222 flow [2023-08-29 20:05:04,721 INFO L130 PetriNetUnfolder]: 7/137 cut-off events. [2023-08-29 20:05:04,721 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:05:04,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 137 events. 7/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 20:05:04,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 5256 [2023-08-29 20:05:06,107 INFO L134 LiptonReduction]: Checked pairs total: 6620 [2023-08-29 20:05:06,107 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-29 20:05:06,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:05:06,108 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:06,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:05:06,111 INFO L130 PetriNetUnfolder]: 2/34 cut-off events. [2023-08-29 20:05:06,111 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:05:06,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:06,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 20:05:06,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:05:06,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1783907903, now seen corresponding path program 1 times [2023-08-29 20:05:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:06,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525681876] [2023-08-29 20:05:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:06,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:06,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:05:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:06,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:05:06,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:05:06,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:05:06,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 20:05:06,141 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:05:06,142 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:05:06,142 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:05:06,142 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 20:05:06,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:05:06,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,178 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2023-08-29 20:05:06,178 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:05:06,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 191 events. 10/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 517 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-29 20:05:06,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:06,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:06,192 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2023-08-29 20:05:06,192 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:05:06,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 191 events. 10/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 517 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-29 20:05:06,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 11880 [2023-08-29 20:05:08,007 INFO L134 LiptonReduction]: Checked pairs total: 14977 [2023-08-29 20:05:08,007 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-29 20:05:08,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:05:08,008 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:08,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 20:05:08,009 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:05:08,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:08,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:08,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:08,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:05:08,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 33757, now seen corresponding path program 1 times [2023-08-29 20:05:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:08,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600457747] [2023-08-29 20:05:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:08,023 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 20:05:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600457747] [2023-08-29 20:05:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600457747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:08,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:08,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044350235] [2023-08-29 20:05:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:08,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:05:08,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:05:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:05:08,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 275 [2023-08-29 20:05:08,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 2 states, 2 states have (on average 123.0) internal successors, (246), 2 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 20:05:08,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:08,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 275 [2023-08-29 20:05:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:08,345 INFO L130 PetriNetUnfolder]: 4194/5911 cut-off events. [2023-08-29 20:05:08,346 INFO L131 PetriNetUnfolder]: For 403/403 co-relation queries the response was YES. [2023-08-29 20:05:08,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12034 conditions, 5911 events. 4194/5911 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32473 event pairs, 3546 based on Foata normal form. 0/3724 useless extension candidates. Maximal degree in co-relation 1263. Up to 5795 conditions per place. [2023-08-29 20:05:08,364 INFO L137 encePairwiseOnDemand]: 273/275 looper letters, 28 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-08-29 20:05:08,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 139 flow [2023-08-29 20:05:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:05:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:05:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 274 transitions. [2023-08-29 20:05:08,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49818181818181817 [2023-08-29 20:05:08,366 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 274 transitions. [2023-08-29 20:05:08,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 274 transitions. [2023-08-29 20:05:08,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:08,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 274 transitions. [2023-08-29 20:05:08,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 137.0) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,368 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,368 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 2 states and 274 transitions. [2023-08-29 20:05:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 139 flow [2023-08-29 20:05:08,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 133 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:08,371 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 77 flow [2023-08-29 20:05:08,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=77, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-29 20:05:08,372 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-29 20:05:08,373 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 77 flow [2023-08-29 20:05:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.0) internal successors, (246), 2 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 20:05:08,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:08,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 20:05:08,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:05:08,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash 33766, now seen corresponding path program 1 times [2023-08-29 20:05:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:08,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874378849] [2023-08-29 20:05:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:08,400 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 20:05:08,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874378849] [2023-08-29 20:05:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874378849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297052757] [2023-08-29 20:05:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:08,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:08,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 275 [2023-08-29 20:05:08,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 77 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 20:05:08,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:08,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 275 [2023-08-29 20:05:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:08,645 INFO L130 PetriNetUnfolder]: 3060/4377 cut-off events. [2023-08-29 20:05:08,646 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-29 20:05:08,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8848 conditions, 4377 events. 3060/4377 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22958 event pairs, 2574 based on Foata normal form. 0/2914 useless extension candidates. Maximal degree in co-relation 8842. Up to 4260 conditions per place. [2023-08-29 20:05:08,670 INFO L137 encePairwiseOnDemand]: 273/275 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 20:05:08,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 129 flow [2023-08-29 20:05:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 20:05:08,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45575757575757575 [2023-08-29 20:05:08,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 20:05:08,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 20:05:08,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:08,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 20:05:08,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,674 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 77 flow. Second operand 3 states and 376 transitions. [2023-08-29 20:05:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 129 flow [2023-08-29 20:05:08,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:08,676 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 77 flow [2023-08-29 20:05:08,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-29 20:05:08,676 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-29 20:05:08,676 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 77 flow [2023-08-29 20:05:08,677 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 20:05:08,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:08,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 20:05:08,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:05:08,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash 33767, now seen corresponding path program 1 times [2023-08-29 20:05:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438824636] [2023-08-29 20:05:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:08,701 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 20:05:08,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:08,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438824636] [2023-08-29 20:05:08,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438824636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:08,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561357404] [2023-08-29 20:05:08,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:08,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:08,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:08,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 275 [2023-08-29 20:05:08,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:08,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 275 [2023-08-29 20:05:08,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:08,853 INFO L130 PetriNetUnfolder]: 1926/2843 cut-off events. [2023-08-29 20:05:08,853 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-29 20:05:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 2843 events. 1926/2843 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14020 event pairs, 1602 based on Foata normal form. 0/2104 useless extension candidates. Maximal degree in co-relation 5775. Up to 2726 conditions per place. [2023-08-29 20:05:08,874 INFO L137 encePairwiseOnDemand]: 273/275 looper letters, 25 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 20:05:08,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 127 flow [2023-08-29 20:05:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-29 20:05:08,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618181818181818 [2023-08-29 20:05:08,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-29 20:05:08,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-29 20:05:08,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:08,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-29 20:05:08,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 20:05:08,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,878 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-08-29 20:05:08,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 127 flow [2023-08-29 20:05:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:08,879 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 76 flow [2023-08-29 20:05:08,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=76, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-29 20:05:08,879 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-29 20:05:08,879 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 76 flow [2023-08-29 20:05:08,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:08,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:05:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 20:05:08,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:05:08,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash 32477057, now seen corresponding path program 1 times [2023-08-29 20:05:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:08,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813854115] [2023-08-29 20:05:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:08,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:08,897 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 20:05:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813854115] [2023-08-29 20:05:08,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813854115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:08,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:08,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:08,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535319430] [2023-08-29 20:05:08,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:08,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:08,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 275 [2023-08-29 20:05:08,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:08,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:08,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 275 [2023-08-29 20:05:08,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:09,059 INFO L130 PetriNetUnfolder]: 1525/2241 cut-off events. [2023-08-29 20:05:09,060 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-29 20:05:09,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 2241 events. 1525/2241 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11047 event pairs, 461 based on Foata normal form. 0/1800 useless extension candidates. Maximal degree in co-relation 4582. Up to 1621 conditions per place. [2023-08-29 20:05:09,066 INFO L137 encePairwiseOnDemand]: 268/275 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-29 20:05:09,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 210 flow [2023-08-29 20:05:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-29 20:05:09,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860606060606061 [2023-08-29 20:05:09,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-29 20:05:09,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-29 20:05:09,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:09,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-29 20:05:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,070 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 76 flow. Second operand 3 states and 401 transitions. [2023-08-29 20:05:09,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 210 flow [2023-08-29 20:05:09,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:09,071 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 105 flow [2023-08-29 20:05:09,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-29 20:05:09,073 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-29 20:05:09,073 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 105 flow [2023-08-29 20:05:09,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:09,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:05:09,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 20:05:09,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:05:09,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1137626951, now seen corresponding path program 1 times [2023-08-29 20:05:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:09,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799686738] [2023-08-29 20:05:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:05:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799686738] [2023-08-29 20:05:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799686738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:05:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024343415] [2023-08-29 20:05:09,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 275 [2023-08-29 20:05:09,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:09,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 275 [2023-08-29 20:05:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:09,222 INFO L130 PetriNetUnfolder]: 1237/1837 cut-off events. [2023-08-29 20:05:09,222 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-29 20:05:09,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4111 conditions, 1837 events. 1237/1837 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8396 event pairs, 935 based on Foata normal form. 128/1928 useless extension candidates. Maximal degree in co-relation 4103. Up to 1755 conditions per place. [2023-08-29 20:05:09,224 INFO L137 encePairwiseOnDemand]: 271/275 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-29 20:05:09,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 145 flow [2023-08-29 20:05:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-29 20:05:09,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2023-08-29 20:05:09,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-29 20:05:09,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-29 20:05:09,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:09,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-29 20:05:09,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,229 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 105 flow. Second operand 3 states and 380 transitions. [2023-08-29 20:05:09,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 145 flow [2023-08-29 20:05:09,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:09,230 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-29 20:05:09,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-29 20:05:09,230 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-29 20:05:09,230 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-29 20:05:09,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 20:05:09,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-29 20:05:09,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 20:05:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 20:05:09,232 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 20:05:09,232 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:05:09,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,242 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2023-08-29 20:05:09,242 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:05:09,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 191 events. 10/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 517 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-29 20:05:09,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:09,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 305 flow [2023-08-29 20:05:09,252 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2023-08-29 20:05:09,252 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:05:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 191 events. 10/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 517 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-29 20:05:09,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 11880 [2023-08-29 20:05:11,008 INFO L134 LiptonReduction]: Checked pairs total: 15047 [2023-08-29 20:05:11,008 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-29 20:05:11,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:05:11,009 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:11,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:05:11,012 INFO L130 PetriNetUnfolder]: 3/49 cut-off events. [2023-08-29 20:05:11,012 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:05:11,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:11,012 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 20:05:11,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:05:11,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:11,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1513911216, now seen corresponding path program 1 times [2023-08-29 20:05:11,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479219805] [2023-08-29 20:05:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:11,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:05:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:11,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:05:11,029 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:05:11,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:05:11,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 20:05:11,030 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:05:11,031 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:05:11,031 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:05:11,031 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 20:05:11,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:05:11,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,067 INFO L130 PetriNetUnfolder]: 13/245 cut-off events. [2023-08-29 20:05:11,067 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 245 events. 13/245 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 767 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2023-08-29 20:05:11,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:11,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:11,081 INFO L130 PetriNetUnfolder]: 13/245 cut-off events. [2023-08-29 20:05:11,082 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:11,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 245 events. 13/245 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 767 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2023-08-29 20:05:11,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 21168 [2023-08-29 20:05:13,237 INFO L134 LiptonReduction]: Checked pairs total: 25416 [2023-08-29 20:05:13,237 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-29 20:05:13,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:05:13,244 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:13,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 20:05:13,244 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:05:13,244 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:13,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:13,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:13,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:05:13,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash 50325, now seen corresponding path program 1 times [2023-08-29 20:05:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748130618] [2023-08-29 20:05:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:13,252 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 20:05:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748130618] [2023-08-29 20:05:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748130618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:13,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:13,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145892136] [2023-08-29 20:05:13,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:13,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:05:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:05:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:05:13,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 350 [2023-08-29 20:05:13,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 154.0) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:13,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:13,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 350 [2023-08-29 20:05:13,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:15,780 INFO L130 PetriNetUnfolder]: 40552/52573 cut-off events. [2023-08-29 20:05:15,780 INFO L131 PetriNetUnfolder]: For 5058/5058 co-relation queries the response was YES. [2023-08-29 20:05:15,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107249 conditions, 52573 events. 40552/52573 cut-off events. For 5058/5058 co-relation queries the response was YES. Maximal size of possible extension queue 2539. Compared 303247 event pairs, 34416 based on Foata normal form. 0/34069 useless extension candidates. Maximal degree in co-relation 12121. Up to 51757 conditions per place. [2023-08-29 20:05:16,019 INFO L137 encePairwiseOnDemand]: 348/350 looper letters, 36 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2023-08-29 20:05:16,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 182 flow [2023-08-29 20:05:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:05:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:05:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 344 transitions. [2023-08-29 20:05:16,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2023-08-29 20:05:16,021 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 344 transitions. [2023-08-29 20:05:16,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 344 transitions. [2023-08-29 20:05:16,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:16,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 344 transitions. [2023-08-29 20:05:16,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 172.0) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:16,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:16,024 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:16,024 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 114 flow. Second operand 2 states and 344 transitions. [2023-08-29 20:05:16,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 182 flow [2023-08-29 20:05:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:16,029 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 98 flow [2023-08-29 20:05:16,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-29 20:05:16,030 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-29 20:05:16,030 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 98 flow [2023-08-29 20:05:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.0) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:16,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:16,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:16,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 20:05:16,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:05:16,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash 50340, now seen corresponding path program 1 times [2023-08-29 20:05:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078377417] [2023-08-29 20:05:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:05:16,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078377417] [2023-08-29 20:05:16,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078377417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:16,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:16,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:16,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067671175] [2023-08-29 20:05:16,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:16,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:16,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:16,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 350 [2023-08-29 20:05:16,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:16,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:16,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 350 [2023-08-29 20:05:16,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:17,869 INFO L130 PetriNetUnfolder]: 29814/39034 cut-off events. [2023-08-29 20:05:17,869 INFO L131 PetriNetUnfolder]: For 1115/1115 co-relation queries the response was YES. [2023-08-29 20:05:17,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78702 conditions, 39034 events. 29814/39034 cut-off events. For 1115/1115 co-relation queries the response was YES. Maximal size of possible extension queue 1793. Compared 219653 event pairs, 25212 based on Foata normal form. 0/26399 useless extension candidates. Maximal degree in co-relation 78695. Up to 38217 conditions per place. [2023-08-29 20:05:18,002 INFO L137 encePairwiseOnDemand]: 348/350 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-29 20:05:18,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 166 flow [2023-08-29 20:05:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-29 20:05:18,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-08-29 20:05:18,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-29 20:05:18,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-29 20:05:18,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:18,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-29 20:05:18,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:18,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:18,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:18,007 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 98 flow. Second operand 3 states and 483 transitions. [2023-08-29 20:05:18,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 166 flow [2023-08-29 20:05:18,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:18,009 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 98 flow [2023-08-29 20:05:18,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-29 20:05:18,009 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-29 20:05:18,010 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 98 flow [2023-08-29 20:05:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:18,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:18,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 20:05:18,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:05:18,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash 50339, now seen corresponding path program 1 times [2023-08-29 20:05:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142541275] [2023-08-29 20:05:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:18,023 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 20:05:18,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:18,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142541275] [2023-08-29 20:05:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142541275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:18,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:18,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931841504] [2023-08-29 20:05:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:18,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 350 [2023-08-29 20:05:18,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:18,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:18,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 350 [2023-08-29 20:05:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:19,374 INFO L130 PetriNetUnfolder]: 19076/25495 cut-off events. [2023-08-29 20:05:19,374 INFO L131 PetriNetUnfolder]: For 1115/1115 co-relation queries the response was YES. [2023-08-29 20:05:19,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51626 conditions, 25495 events. 19076/25495 cut-off events. For 1115/1115 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 138427 event pairs, 16008 based on Foata normal form. 0/18729 useless extension candidates. Maximal degree in co-relation 51618. Up to 24678 conditions per place. [2023-08-29 20:05:19,451 INFO L137 encePairwiseOnDemand]: 348/350 looper letters, 33 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-29 20:05:19,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 164 flow [2023-08-29 20:05:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-29 20:05:19,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-08-29 20:05:19,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-29 20:05:19,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-29 20:05:19,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:19,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-29 20:05:19,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:19,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:19,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:19,456 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 98 flow. Second operand 3 states and 476 transitions. [2023-08-29 20:05:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 164 flow [2023-08-29 20:05:19,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:19,457 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 97 flow [2023-08-29 20:05:19,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=97, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-29 20:05:19,457 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-29 20:05:19,458 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 97 flow [2023-08-29 20:05:19,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:19,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:19,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:05:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 20:05:19,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:05:19,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 48419109, now seen corresponding path program 1 times [2023-08-29 20:05:19,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:19,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656738208] [2023-08-29 20:05:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:19,470 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 20:05:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:19,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656738208] [2023-08-29 20:05:19,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656738208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:19,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:19,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560861978] [2023-08-29 20:05:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:19,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:19,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 350 [2023-08-29 20:05:19,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:19,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:19,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 350 [2023-08-29 20:05:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:20,539 INFO L130 PetriNetUnfolder]: 15543/20499 cut-off events. [2023-08-29 20:05:20,539 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-08-29 20:05:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41824 conditions, 20499 events. 15543/20499 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 110506 event pairs, 4221 based on Foata normal form. 0/15983 useless extension candidates. Maximal degree in co-relation 41816. Up to 17335 conditions per place. [2023-08-29 20:05:20,587 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 53 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-29 20:05:20,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 276 flow [2023-08-29 20:05:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-29 20:05:20,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819047619047619 [2023-08-29 20:05:20,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-29 20:05:20,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-29 20:05:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:20,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-29 20:05:20,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:20,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:20,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:20,591 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 97 flow. Second operand 3 states and 506 transitions. [2023-08-29 20:05:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 276 flow [2023-08-29 20:05:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:20,593 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 135 flow [2023-08-29 20:05:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-29 20:05:20,593 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-29 20:05:20,593 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 135 flow [2023-08-29 20:05:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:05:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 20:05:20,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:05:20,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash 752476272, now seen corresponding path program 1 times [2023-08-29 20:05:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475945063] [2023-08-29 20:05:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:05:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:20,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475945063] [2023-08-29 20:05:20,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475945063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:20,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:20,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:05:20,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834692979] [2023-08-29 20:05:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:20,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:20,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:20,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:20,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 350 [2023-08-29 20:05:20,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:20,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:20,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 350 [2023-08-29 20:05:20,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:21,379 INFO L130 PetriNetUnfolder]: 10525/14077 cut-off events. [2023-08-29 20:05:21,379 INFO L131 PetriNetUnfolder]: For 2790/2790 co-relation queries the response was YES. [2023-08-29 20:05:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31224 conditions, 14077 events. 10525/14077 cut-off events. For 2790/2790 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 70371 event pairs, 7967 based on Foata normal form. 1344/15216 useless extension candidates. Maximal degree in co-relation 31215. Up to 13635 conditions per place. [2023-08-29 20:05:21,397 INFO L137 encePairwiseOnDemand]: 345/350 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-29 20:05:21,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 187 flow [2023-08-29 20:05:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:05:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:05:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-29 20:05:21,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552380952380952 [2023-08-29 20:05:21,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-29 20:05:21,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-29 20:05:21,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:21,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-29 20:05:21,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:21,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:21,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:21,404 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 135 flow. Second operand 3 states and 478 transitions. [2023-08-29 20:05:21,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 187 flow [2023-08-29 20:05:21,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:05:21,408 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-29 20:05:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-29 20:05:21,409 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-29 20:05:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-29 20:05:21,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:21,409 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 20:05:21,409 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-29 20:05:21,410 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 20:05:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 20:05:21,410 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 20:05:21,411 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:05:21,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,430 INFO L130 PetriNetUnfolder]: 13/245 cut-off events. [2023-08-29 20:05:21,430 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:21,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 245 events. 13/245 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 767 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2023-08-29 20:05:21,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:21,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 179 transitions, 390 flow [2023-08-29 20:05:21,448 INFO L130 PetriNetUnfolder]: 13/245 cut-off events. [2023-08-29 20:05:21,449 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:21,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 245 events. 13/245 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 767 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2023-08-29 20:05:21,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 21168 [2023-08-29 20:05:23,787 INFO L134 LiptonReduction]: Checked pairs total: 25704 [2023-08-29 20:05:23,787 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-29 20:05:23,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:05:23,788 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:23,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:05:23,792 INFO L130 PetriNetUnfolder]: 4/64 cut-off events. [2023-08-29 20:05:23,793 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:05:23,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:23,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 20:05:23,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:05:23,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1163588757, now seen corresponding path program 1 times [2023-08-29 20:05:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:23,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544857286] [2023-08-29 20:05:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:23,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:05:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:05:23,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:05:23,823 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:05:23,823 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:05:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 20:05:23,823 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:05:23,825 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:05:23,825 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:05:23,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 20:05:23,848 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:05:23,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,872 INFO L130 PetriNetUnfolder]: 16/299 cut-off events. [2023-08-29 20:05:23,872 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:05:23,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 299 events. 16/299 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1011 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 258. Up to 12 conditions per place. [2023-08-29 20:05:23,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:05:23,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:05:23,902 INFO L130 PetriNetUnfolder]: 16/299 cut-off events. [2023-08-29 20:05:23,902 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:05:23,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 299 events. 16/299 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1011 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 258. Up to 12 conditions per place. [2023-08-29 20:05:23,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 33120 [2023-08-29 20:05:26,719 INFO L134 LiptonReduction]: Checked pairs total: 39488 [2023-08-29 20:05:26,719 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-08-29 20:05:26,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:05:26,720 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:05:26,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 20:05:26,721 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:05:26,721 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:05:26,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:26,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:26,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:05:26,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash 70723, now seen corresponding path program 1 times [2023-08-29 20:05:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:26,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169586429] [2023-08-29 20:05:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:26,727 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 20:05:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169586429] [2023-08-29 20:05:26,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169586429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:26,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:26,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701175712] [2023-08-29 20:05:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:26,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:05:26,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:26,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:05:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:05:26,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 423 [2023-08-29 20:05:26,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 143 flow. Second operand has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 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 20:05:26,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:26,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 423 [2023-08-29 20:05:26,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:05:49,741 INFO L130 PetriNetUnfolder]: 362286/446435 cut-off events. [2023-08-29 20:05:49,741 INFO L131 PetriNetUnfolder]: For 55528/55528 co-relation queries the response was YES. [2023-08-29 20:05:50,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912075 conditions, 446435 events. 362286/446435 cut-off events. For 55528/55528 co-relation queries the response was YES. Maximal size of possible extension queue 16468. Compared 2654196 event pairs, 308130 based on Foata normal form. 0/294505 useless extension candidates. Maximal degree in co-relation 107888. Up to 440719 conditions per place. [2023-08-29 20:05:51,433 INFO L137 encePairwiseOnDemand]: 421/423 looper letters, 44 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-08-29 20:05:51,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 227 flow [2023-08-29 20:05:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:05:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:05:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 414 transitions. [2023-08-29 20:05:51,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2023-08-29 20:05:51,435 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 414 transitions. [2023-08-29 20:05:51,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 414 transitions. [2023-08-29 20:05:51,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:05:51,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 414 transitions. [2023-08-29 20:05:51,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 207.0) internal successors, (414), 2 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:51,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:51,437 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:51,437 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 143 flow. Second operand 2 states and 414 transitions. [2023-08-29 20:05:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 227 flow [2023-08-29 20:05:51,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 207 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-29 20:05:51,462 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 119 flow [2023-08-29 20:05:51,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=119, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-29 20:05:51,463 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-08-29 20:05:51,463 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 119 flow [2023-08-29 20:05:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 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 20:05:51,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:05:51,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:05:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 20:05:51,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:05:51,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:05:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 70744, now seen corresponding path program 1 times [2023-08-29 20:05:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:05:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654752992] [2023-08-29 20:05:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:05:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:05:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:05:51,482 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 20:05:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:05:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654752992] [2023-08-29 20:05:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654752992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:05:51,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:05:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:05:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642948400] [2023-08-29 20:05:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:05:51,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:05:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:05:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:05:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:05:51,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 20:05:51,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:05:51,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:05:51,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 20:05:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:06:08,151 INFO L130 PetriNetUnfolder]: 267513/332054 cut-off events. [2023-08-29 20:06:08,151 INFO L131 PetriNetUnfolder]: For 7828/7828 co-relation queries the response was YES. [2023-08-29 20:06:08,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668516 conditions, 332054 events. 267513/332054 cut-off events. For 7828/7828 co-relation queries the response was YES. Maximal size of possible extension queue 11617. Compared 1942520 event pairs, 226896 based on Foata normal form. 0/226810 useless extension candidates. Maximal degree in co-relation 668508. Up to 326337 conditions per place. [2023-08-29 20:06:09,492 INFO L137 encePairwiseOnDemand]: 421/423 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-29 20:06:09,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 203 flow [2023-08-29 20:06:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:06:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:06:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-29 20:06:09,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45547675334909377 [2023-08-29 20:06:09,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-29 20:06:09,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-29 20:06:09,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:06:09,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-29 20:06:09,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:09,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:09,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:09,496 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 119 flow. Second operand 3 states and 578 transitions. [2023-08-29 20:06:09,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 203 flow [2023-08-29 20:06:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:06:09,525 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 119 flow [2023-08-29 20:06:09,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-29 20:06:09,525 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-29 20:06:09,525 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 119 flow [2023-08-29 20:06:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:09,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:06:09,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:06:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 20:06:09,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:06:09,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:06:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash 70745, now seen corresponding path program 1 times [2023-08-29 20:06:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:06:09,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785232591] [2023-08-29 20:06:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:06:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:06:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:06:09,543 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 20:06:09,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:06:09,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785232591] [2023-08-29 20:06:09,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785232591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:06:09,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:06:09,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:06:09,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972150654] [2023-08-29 20:06:09,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:06:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:06:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:06:09,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:06:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:06:09,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 423 [2023-08-29 20:06:09,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:09,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:06:09,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 423 [2023-08-29 20:06:09,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:06:20,262 INFO L130 PetriNetUnfolder]: 172740/217673 cut-off events. [2023-08-29 20:06:20,262 INFO L131 PetriNetUnfolder]: For 7828/7828 co-relation queries the response was YES. [2023-08-29 20:06:20,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439756 conditions, 217673 events. 172740/217673 cut-off events. For 7828/7828 co-relation queries the response was YES. Maximal size of possible extension queue 6797. Compared 1245524 event pairs, 145662 based on Foata normal form. 0/159115 useless extension candidates. Maximal degree in co-relation 439747. Up to 211956 conditions per place. [2023-08-29 20:06:21,084 INFO L137 encePairwiseOnDemand]: 421/423 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 20:06:21,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 201 flow [2023-08-29 20:06:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:06:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:06:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-08-29 20:06:21,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570527974783294 [2023-08-29 20:06:21,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-08-29 20:06:21,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-08-29 20:06:21,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:06:21,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-08-29 20:06:21,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:21,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:21,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:21,089 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 119 flow. Second operand 3 states and 580 transitions. [2023-08-29 20:06:21,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 201 flow [2023-08-29 20:06:21,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:06:21,101 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 118 flow [2023-08-29 20:06:21,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=118, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-29 20:06:21,102 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-29 20:06:21,102 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 118 flow [2023-08-29 20:06:21,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:21,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:06:21,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:06:21,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 20:06:21,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:06:21,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:06:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash 68047391, now seen corresponding path program 1 times [2023-08-29 20:06:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:06:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702163976] [2023-08-29 20:06:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:06:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:06:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:06:21,114 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 20:06:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:06:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702163976] [2023-08-29 20:06:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702163976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:06:21,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:06:21,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:06:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011201306] [2023-08-29 20:06:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:06:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:06:21,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:06:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:06:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:06:21,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 20:06:21,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:21,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:06:21,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 20:06:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:06:30,022 INFO L130 PetriNetUnfolder]: 146239/181311 cut-off events. [2023-08-29 20:06:30,023 INFO L131 PetriNetUnfolder]: For 6910/6910 co-relation queries the response was YES. [2023-08-29 20:06:30,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369033 conditions, 181311 events. 146239/181311 cut-off events. For 6910/6910 co-relation queries the response was YES. Maximal size of possible extension queue 6701. Compared 1017356 event pairs, 38427 based on Foata normal form. 0/138379 useless extension candidates. Maximal degree in co-relation 369024. Up to 165923 conditions per place. [2023-08-29 20:06:30,700 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 66 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-29 20:06:30,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 342 flow [2023-08-29 20:06:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:06:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:06:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-29 20:06:30,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-29 20:06:30,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-29 20:06:30,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-29 20:06:30,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:06:30,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-29 20:06:30,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:30,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:30,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:30,705 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 118 flow. Second operand 3 states and 611 transitions. [2023-08-29 20:06:30,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 342 flow [2023-08-29 20:06:30,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:06:30,706 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 165 flow [2023-08-29 20:06:30,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-29 20:06:30,707 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-29 20:06:30,707 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 165 flow [2023-08-29 20:06:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:30,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:06:30,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:06:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 20:06:30,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:06:30,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:06:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1130968410, now seen corresponding path program 1 times [2023-08-29 20:06:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:06:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030144841] [2023-08-29 20:06:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:06:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:06:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:06:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:06:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:06:30,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030144841] [2023-08-29 20:06:30,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030144841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:06:30,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:06:30,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:06:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157694473] [2023-08-29 20:06:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:06:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:06:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:06:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:06:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:06:30,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 20:06:30,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:30,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:06:30,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 20:06:30,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:06:36,092 INFO L130 PetriNetUnfolder]: 81805/102893 cut-off events. [2023-08-29 20:06:36,093 INFO L131 PetriNetUnfolder]: For 21702/21702 co-relation queries the response was YES. [2023-08-29 20:06:36,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226857 conditions, 102893 events. 81805/102893 cut-off events. For 21702/21702 co-relation queries the response was YES. Maximal size of possible extension queue 3167. Compared 540295 event pairs, 62095 based on Foata normal form. 11744/113473 useless extension candidates. Maximal degree in co-relation 226847. Up to 100467 conditions per place. [2023-08-29 20:06:36,330 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-29 20:06:36,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 229 flow [2023-08-29 20:06:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:06:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:06:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2023-08-29 20:06:36,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-08-29 20:06:36,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2023-08-29 20:06:36,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2023-08-29 20:06:36,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:06:36,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2023-08-29 20:06:36,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:36,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:36,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:36,334 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 165 flow. Second operand 3 states and 576 transitions. [2023-08-29 20:06:36,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 229 flow [2023-08-29 20:06:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:06:36,340 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-29 20:06:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-29 20:06:36,340 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2023-08-29 20:06:36,340 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-29 20:06:36,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:36,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 9 remaining) [2023-08-29 20:06:36,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 20:06:36,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 20:06:36,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 20:06:36,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 20:06:36,342 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 20:06:36,342 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-29 20:06:36,342 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 20:06:36,342 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-29 20:06:36,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 20:06:36,342 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 20:06:36,343 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:06:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,362 INFO L130 PetriNetUnfolder]: 16/299 cut-off events. [2023-08-29 20:06:36,362 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:06:36,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 299 events. 16/299 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1011 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 258. Up to 12 conditions per place. [2023-08-29 20:06:36,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:06:36,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 216 transitions, 477 flow [2023-08-29 20:06:36,381 INFO L130 PetriNetUnfolder]: 16/299 cut-off events. [2023-08-29 20:06:36,381 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:06:36,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 299 events. 16/299 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1011 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 258. Up to 12 conditions per place. [2023-08-29 20:06:36,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 33120 [2023-08-29 20:06:39,068 INFO L134 LiptonReduction]: Checked pairs total: 41505 [2023-08-29 20:06:39,068 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-08-29 20:06:39,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:06:39,069 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:06:39,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:06:39,073 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2023-08-29 20:06:39,073 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:06:39,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:06:39,073 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:06:39,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:06:39,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:06:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash -406860927, now seen corresponding path program 1 times [2023-08-29 20:06:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:06:39,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259657611] [2023-08-29 20:06:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:06:39,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:06:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:06:39,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:06:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:06:39,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:06:39,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:06:39,107 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:06:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 20:06:39,107 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:06:39,107 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:06:39,107 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:06:39,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-29 20:06:39,128 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:06:39,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,153 INFO L130 PetriNetUnfolder]: 19/353 cut-off events. [2023-08-29 20:06:39,153 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:06:39,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 353 events. 19/353 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1254 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 319. Up to 14 conditions per place. [2023-08-29 20:06:39,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:06:39,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 253 transitions, 566 flow [2023-08-29 20:06:39,179 INFO L130 PetriNetUnfolder]: 19/353 cut-off events. [2023-08-29 20:06:39,179 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:06:39,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 353 events. 19/353 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1254 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 319. Up to 14 conditions per place. [2023-08-29 20:06:39,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 47736 [2023-08-29 20:06:42,199 INFO L134 LiptonReduction]: Checked pairs total: 60636 [2023-08-29 20:06:42,199 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-29 20:06:42,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:06:42,225 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;@84c5091, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:06:42,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 20:06:42,225 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:06:42,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:06:42,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:06:42,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:06:42,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 20:06:42,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:06:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 94178, now seen corresponding path program 1 times [2023-08-29 20:06:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:06:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123530904] [2023-08-29 20:06:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:06:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:06:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:06:42,231 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 20:06:42,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:06:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123530904] [2023-08-29 20:06:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123530904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:06:42,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:06:42,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:06:42,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043448484] [2023-08-29 20:06:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:06:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:06:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:06:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:06:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:06:42,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 500 [2023-08-29 20:06:42,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 174 flow. Second operand has 2 states, 2 states have (on average 216.0) internal successors, (432), 2 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:06:42,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:06:42,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 500 [2023-08-29 20:06:42,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand