./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-ticket-6.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/weaver/parallel-ticket-6.wvr.c -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 c7095f70ba7104a12a93da2a0b557c5b5c6880d23caa33c7c2fd19334f4cb537 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:33:12,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:33:12,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:33:12,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:33:12,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:33:12,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:33:12,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:33:12,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:33:12,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:33:12,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:33:12,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:33:12,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:33:12,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:33:12,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:33:12,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:33:12,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:33:12,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:33:12,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:33:12,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:33:12,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:33:12,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:33:12,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:33:12,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:33:12,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:33:12,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:33:12,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:33:12,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:33:12,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:33:12,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:33:12,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:33:12,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:33:12,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:33:12,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:33:12,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:33:12,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:33:12,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:33:12,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:33:12,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:33:12,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:33:12,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:33:12,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:33:12,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:33:12,558 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:33:12,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:33:12,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:33:12,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:33:12,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:33:12,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:33:12,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:33:12,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:33:12,561 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:33:12,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:33:12,562 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:33:12,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:33:12,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:33:12,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:33:12,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:33:12,563 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:33:12,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:33:12,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:33:12,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:33:12,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:33:12,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:33:12,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:33:12,565 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:33:12,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7095f70ba7104a12a93da2a0b557c5b5c6880d23caa33c7c2fd19334f4cb537 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:33:12,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:33:12,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:33:12,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:33:12,840 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:33:12,840 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:33:12,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-6.wvr.c [2023-09-01 02:33:13,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:33:14,029 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:33:14,030 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-6.wvr.c [2023-09-01 02:33:14,036 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e058ad7af/07b118b62ad9439f876c9efea8bd17ce/FLAG01867f9c5 [2023-09-01 02:33:14,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e058ad7af/07b118b62ad9439f876c9efea8bd17ce [2023-09-01 02:33:14,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:33:14,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:33:14,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:33:14,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:33:14,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:33:14,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8a61a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14, skipping insertion in model container [2023-09-01 02:33:14,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:33:14,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:33:14,221 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-6.wvr.c[4400,4413] [2023-09-01 02:33:14,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:33:14,238 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:33:14,272 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-6.wvr.c[4400,4413] [2023-09-01 02:33:14,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:33:14,286 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:33:14,286 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:33:14,291 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:33:14,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14 WrapperNode [2023-09-01 02:33:14,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:33:14,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:33:14,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:33:14,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:33:14,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,356 INFO L138 Inliner]: procedures = 25, calls = 100, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 288 [2023-09-01 02:33:14,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:33:14,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:33:14,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:33:14,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:33:14,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,399 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:33:14,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:33:14,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:33:14,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:33:14,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (1/1) ... [2023-09-01 02:33:14,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:33:14,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:33:14,450 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) [2023-09-01 02:33:14,478 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 [2023-09-01 02:33:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:33:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:33:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:33:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:33:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:33:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:33:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:33:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:33:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:33:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:33:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:33:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:33:14,506 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:33:14,606 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:33:14,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:33:15,019 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:33:15,092 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:33:15,093 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 02:33:15,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:15 BoogieIcfgContainer [2023-09-01 02:33:15,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:33:15,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:33:15,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:33:15,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:33:15,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:33:14" (1/3) ... [2023-09-01 02:33:15,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a608fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:15, skipping insertion in model container [2023-09-01 02:33:15,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:14" (2/3) ... [2023-09-01 02:33:15,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a608fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:15, skipping insertion in model container [2023-09-01 02:33:15,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:15" (3/3) ... [2023-09-01 02:33:15,103 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-6.wvr.c [2023-09-01 02:33:15,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:33:15,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 02:33:15,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:33:15,195 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 02:33:15,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 219 transitions, 486 flow [2023-09-01 02:33:15,280 INFO L130 PetriNetUnfolder]: 2/213 cut-off events. [2023-09-01 02:33:15,281 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:33:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 213 events. 2/213 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 161 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-09-01 02:33:15,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 219 transitions, 486 flow [2023-09-01 02:33:15,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 209 transitions, 454 flow [2023-09-01 02:33:15,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:33:15,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 209 transitions, 454 flow [2023-09-01 02:33:15,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 209 transitions, 454 flow [2023-09-01 02:33:15,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 209 transitions, 454 flow [2023-09-01 02:33:15,344 INFO L130 PetriNetUnfolder]: 2/209 cut-off events. [2023-09-01 02:33:15,364 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:33:15,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 209 events. 2/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 160 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-09-01 02:33:15,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 3930 [2023-09-01 02:33:24,120 INFO L134 LiptonReduction]: Checked pairs total: 22494 [2023-09-01 02:33:24,121 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-09-01 02:33:24,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:33:24,142 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;@5b858b79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:33:24,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-09-01 02:33:24,144 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 02:33:24,144 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:33:24,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:24,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:33:24,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:33:24,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 856, now seen corresponding path program 1 times [2023-09-01 02:33:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904576862] [2023-09-01 02:33:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904576862] [2023-09-01 02:33:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904576862] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:24,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:33:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544809934] [2023-09-01 02:33:24,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:33:24,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:33:24,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:33:24,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 399 [2023-09-01 02:33:24,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:24,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:24,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 399 [2023-09-01 02:33:24,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:32,438 INFO L130 PetriNetUnfolder]: 107865/140648 cut-off events. [2023-09-01 02:33:32,439 INFO L131 PetriNetUnfolder]: For 3091/3091 co-relation queries the response was YES. [2023-09-01 02:33:32,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279915 conditions, 140648 events. 107865/140648 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 5167. Compared 887494 event pairs, 107865 based on Foata normal form. 0/126595 useless extension candidates. Maximal degree in co-relation 229388. Up to 135165 conditions per place. [2023-09-01 02:33:33,313 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 65 selfloop transitions, 0 changer transitions 0/72 dead transitions. [2023-09-01 02:33:33,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 72 transitions, 310 flow [2023-09-01 02:33:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:33:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:33:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 440 transitions. [2023-09-01 02:33:33,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5513784461152882 [2023-09-01 02:33:33,330 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 440 transitions. [2023-09-01 02:33:33,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 440 transitions. [2023-09-01 02:33:33,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:33,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 440 transitions. [2023-09-01 02:33:33,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:33,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:33,347 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:33,348 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 186 flow. Second operand 2 states and 440 transitions. [2023-09-01 02:33:33,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 72 transitions, 310 flow [2023-09-01 02:33:33,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 02:33:33,836 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 156 flow [2023-09-01 02:33:33,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-09-01 02:33:33,842 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2023-09-01 02:33:33,843 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 156 flow [2023-09-01 02:33:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:33,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:33,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:33:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:33:33,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:33:33,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash 843898, now seen corresponding path program 1 times [2023-09-01 02:33:33,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119718277] [2023-09-01 02:33:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:33,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:34,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119718277] [2023-09-01 02:33:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119718277] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:33:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448313008] [2023-09-01 02:33:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:34,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:34,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2023-09-01 02:33:34,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:34,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:34,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2023-09-01 02:33:34,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:40,992 INFO L130 PetriNetUnfolder]: 104022/135775 cut-off events. [2023-09-01 02:33:40,992 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:33:41,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267436 conditions, 135775 events. 104022/135775 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5105. Compared 856881 event pairs, 104022 based on Foata normal form. 0/122750 useless extension candidates. Maximal degree in co-relation 267433. Up to 130293 conditions per place. [2023-09-01 02:33:41,634 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 62 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-09-01 02:33:41,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 278 flow [2023-09-01 02:33:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:33:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:33:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-09-01 02:33:41,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878863826232247 [2023-09-01 02:33:41,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-09-01 02:33:41,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-09-01 02:33:41,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:41,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-09-01 02:33:41,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:41,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:41,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:41,642 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 156 flow. Second operand 3 states and 584 transitions. [2023-09-01 02:33:41,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 278 flow [2023-09-01 02:33:41,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:33:41,643 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 154 flow [2023-09-01 02:33:41,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2023-09-01 02:33:41,644 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2023-09-01 02:33:41,644 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 154 flow [2023-09-01 02:33:41,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:41,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:41,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:33:41,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:33:41,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:33:41,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:41,646 INFO L85 PathProgramCache]: Analyzing trace with hash 843897, now seen corresponding path program 1 times [2023-09-01 02:33:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:41,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327512680] [2023-09-01 02:33:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:41,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:41,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327512680] [2023-09-01 02:33:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327512680] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:41,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:41,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:33:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966465085] [2023-09-01 02:33:41,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:41,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-09-01 02:33:41,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:41,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:41,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-09-01 02:33:41,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:47,665 INFO L130 PetriNetUnfolder]: 100179/130902 cut-off events. [2023-09-01 02:33:47,666 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:33:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257694 conditions, 130902 events. 100179/130902 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 826643 event pairs, 100179 based on Foata normal form. 0/118905 useless extension candidates. Maximal degree in co-relation 257690. Up to 125422 conditions per place. [2023-09-01 02:33:48,239 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 60 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-09-01 02:33:48,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 68 transitions, 272 flow [2023-09-01 02:33:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:33:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:33:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-09-01 02:33:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2023-09-01 02:33:48,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-09-01 02:33:48,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-09-01 02:33:48,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:48,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-09-01 02:33:48,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:48,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:48,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:48,247 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 154 flow. Second operand 3 states and 585 transitions. [2023-09-01 02:33:48,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 68 transitions, 272 flow [2023-09-01 02:33:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:33:48,249 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 151 flow [2023-09-01 02:33:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-09-01 02:33:48,250 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -15 predicate places. [2023-09-01 02:33:48,253 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 151 flow [2023-09-01 02:33:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:48,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:48,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:33:48,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:33:48,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:33:48,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 811004555, now seen corresponding path program 1 times [2023-09-01 02:33:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:48,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325111207] [2023-09-01 02:33:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:48,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:48,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325111207] [2023-09-01 02:33:48,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325111207] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:48,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:48,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:33:48,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582740581] [2023-09-01 02:33:48,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:48,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:48,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:48,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2023-09-01 02:33:48,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:48,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:48,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2023-09-01 02:33:48,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:54,192 INFO L130 PetriNetUnfolder]: 99387/129834 cut-off events. [2023-09-01 02:33:54,192 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:33:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255563 conditions, 129834 events. 99387/129834 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 820046 event pairs, 99387 based on Foata normal form. 0/118110 useless extension candidates. Maximal degree in co-relation 255559. Up to 124358 conditions per place. [2023-09-01 02:33:54,791 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 58 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-09-01 02:33:54,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 265 flow [2023-09-01 02:33:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:33:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:33:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-09-01 02:33:54,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48454469507101083 [2023-09-01 02:33:54,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-09-01 02:33:54,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-09-01 02:33:54,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:54,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-09-01 02:33:54,795 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) [2023-09-01 02:33:54,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:54,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:54,797 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 151 flow. Second operand 3 states and 580 transitions. [2023-09-01 02:33:54,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 265 flow [2023-09-01 02:33:54,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 66 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:33:54,799 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 148 flow [2023-09-01 02:33:54,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2023-09-01 02:33:54,800 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -16 predicate places. [2023-09-01 02:33:54,800 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 148 flow [2023-09-01 02:33:54,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:54,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:54,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:33:54,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:33:54,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:33:54,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash 811004553, now seen corresponding path program 1 times [2023-09-01 02:33:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408091489] [2023-09-01 02:33:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408091489] [2023-09-01 02:33:54,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408091489] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:54,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:54,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:33:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017450716] [2023-09-01 02:33:54,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:54,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:55,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-09-01 02:33:55,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:55,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:55,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-09-01 02:33:55,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:00,612 INFO L130 PetriNetUnfolder]: 98595/128766 cut-off events. [2023-09-01 02:34:00,612 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:00,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253432 conditions, 128766 events. 98595/128766 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 813193 event pairs, 98595 based on Foata normal form. 0/117315 useless extension candidates. Maximal degree in co-relation 253428. Up to 123294 conditions per place. [2023-09-01 02:34:01,560 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 56 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 02:34:01,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 64 transitions, 258 flow [2023-09-01 02:34:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-09-01 02:34:01,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2023-09-01 02:34:01,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-09-01 02:34:01,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-09-01 02:34:01,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:01,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-09-01 02:34:01,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:01,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:01,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:01,569 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 148 flow. Second operand 3 states and 581 transitions. [2023-09-01 02:34:01,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 64 transitions, 258 flow [2023-09-01 02:34:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 64 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:01,571 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 145 flow [2023-09-01 02:34:01,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2023-09-01 02:34:01,572 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -17 predicate places. [2023-09-01 02:34:01,573 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 145 flow [2023-09-01 02:34:01,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:01,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:01,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:34:01,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:01,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:01,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1986316189, now seen corresponding path program 1 times [2023-09-01 02:34:01,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:01,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135055339] [2023-09-01 02:34:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:01,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:01,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135055339] [2023-09-01 02:34:01,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135055339] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:01,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:01,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:01,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855717583] [2023-09-01 02:34:01,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:01,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:01,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:01,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:01,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2023-09-01 02:34:01,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:01,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:01,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2023-09-01 02:34:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:07,256 INFO L130 PetriNetUnfolder]: 98307/128318 cut-off events. [2023-09-01 02:34:07,257 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:07,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252569 conditions, 128318 events. 98307/128318 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 809974 event pairs, 98307 based on Foata normal form. 0/117047 useless extension candidates. Maximal degree in co-relation 252565. Up to 122878 conditions per place. [2023-09-01 02:34:07,961 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 54 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 02:34:07,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 251 flow [2023-09-01 02:34:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2023-09-01 02:34:07,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2023-09-01 02:34:07,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2023-09-01 02:34:07,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2023-09-01 02:34:07,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:07,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2023-09-01 02:34:07,972 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) [2023-09-01 02:34:07,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:07,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:07,975 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 145 flow. Second operand 3 states and 576 transitions. [2023-09-01 02:34:07,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 251 flow [2023-09-01 02:34:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 62 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:07,990 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 142 flow [2023-09-01 02:34:07,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2023-09-01 02:34:07,991 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -18 predicate places. [2023-09-01 02:34:07,991 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 142 flow [2023-09-01 02:34:07,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:07,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:07,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:07,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:34:07,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:07,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1986316187, now seen corresponding path program 1 times [2023-09-01 02:34:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:07,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917392347] [2023-09-01 02:34:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:07,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917392347] [2023-09-01 02:34:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917392347] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:08,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649703355] [2023-09-01 02:34:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:08,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2023-09-01 02:34:08,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:08,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:08,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2023-09-01 02:34:08,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:13,744 INFO L130 PetriNetUnfolder]: 98019/127886 cut-off events. [2023-09-01 02:34:13,745 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251722 conditions, 127886 events. 98019/127886 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 807037 event pairs, 98019 based on Foata normal form. 0/116747 useless extension candidates. Maximal degree in co-relation 251718. Up to 122462 conditions per place. [2023-09-01 02:34:14,449 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 52 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-09-01 02:34:14,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 60 transitions, 244 flow [2023-09-01 02:34:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-09-01 02:34:14,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49958228905597324 [2023-09-01 02:34:14,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-09-01 02:34:14,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-09-01 02:34:14,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:14,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-09-01 02:34:14,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:14,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:14,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:14,456 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 142 flow. Second operand 3 states and 598 transitions. [2023-09-01 02:34:14,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 60 transitions, 244 flow [2023-09-01 02:34:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 60 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:14,457 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 139 flow [2023-09-01 02:34:14,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-09-01 02:34:14,458 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -19 predicate places. [2023-09-01 02:34:14,458 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 139 flow [2023-09-01 02:34:14,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:14,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:14,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:14,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:34:14,459 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:14,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1884397819, now seen corresponding path program 1 times [2023-09-01 02:34:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346633009] [2023-09-01 02:34:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:14,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:14,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346633009] [2023-09-01 02:34:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346633009] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:14,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:14,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139249313] [2023-09-01 02:34:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:14,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:14,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:14,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2023-09-01 02:34:14,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:14,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:14,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2023-09-01 02:34:14,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:20,236 INFO L130 PetriNetUnfolder]: 97227/126758 cut-off events. [2023-09-01 02:34:20,237 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249531 conditions, 126758 events. 97227/126758 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5061. Compared 798720 event pairs, 97227 based on Foata normal form. 0/115891 useless extension candidates. Maximal degree in co-relation 249527. Up to 121398 conditions per place. [2023-09-01 02:34:20,988 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 50 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 02:34:20,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 58 transitions, 237 flow [2023-09-01 02:34:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-09-01 02:34:20,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778613199665831 [2023-09-01 02:34:20,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-09-01 02:34:20,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-09-01 02:34:20,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:20,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-09-01 02:34:20,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:20,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:20,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:20,993 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 139 flow. Second operand 3 states and 572 transitions. [2023-09-01 02:34:20,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 58 transitions, 237 flow [2023-09-01 02:34:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:20,995 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 136 flow [2023-09-01 02:34:20,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-09-01 02:34:20,995 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -20 predicate places. [2023-09-01 02:34:20,996 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 136 flow [2023-09-01 02:34:20,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:20,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:20,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 02:34:20,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:20,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1884397820, now seen corresponding path program 1 times [2023-09-01 02:34:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:20,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029615073] [2023-09-01 02:34:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:20,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:21,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:21,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029615073] [2023-09-01 02:34:21,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029615073] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:21,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601153056] [2023-09-01 02:34:21,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:21,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2023-09-01 02:34:21,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:21,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:21,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2023-09-01 02:34:21,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:26,945 INFO L130 PetriNetUnfolder]: 96435/125630 cut-off events. [2023-09-01 02:34:26,945 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247340 conditions, 125630 events. 96435/125630 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 5052. Compared 790165 event pairs, 96435 based on Foata normal form. 0/115035 useless extension candidates. Maximal degree in co-relation 247336. Up to 120334 conditions per place. [2023-09-01 02:34:27,901 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 48 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 02:34:27,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 56 transitions, 230 flow [2023-09-01 02:34:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-09-01 02:34:27,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49624060150375937 [2023-09-01 02:34:27,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-09-01 02:34:27,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-09-01 02:34:27,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:27,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-09-01 02:34:27,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:27,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:27,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:27,907 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 136 flow. Second operand 3 states and 594 transitions. [2023-09-01 02:34:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 56 transitions, 230 flow [2023-09-01 02:34:27,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:27,909 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 133 flow [2023-09-01 02:34:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-09-01 02:34:27,909 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -21 predicate places. [2023-09-01 02:34:27,909 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 133 flow [2023-09-01 02:34:27,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:27,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:27,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:34:27,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:27,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1569875367, now seen corresponding path program 1 times [2023-09-01 02:34:27,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:27,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089647755] [2023-09-01 02:34:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:27,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:28,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089647755] [2023-09-01 02:34:28,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089647755] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:28,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:28,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:28,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282185669] [2023-09-01 02:34:28,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:28,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:28,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:28,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2023-09-01 02:34:28,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:28,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:28,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2023-09-01 02:34:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:34,126 INFO L130 PetriNetUnfolder]: 92592/120503 cut-off events. [2023-09-01 02:34:34,127 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237343 conditions, 120503 events. 92592/120503 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 4858. Compared 752443 event pairs, 92592 based on Foata normal form. 0/110936 useless extension candidates. Maximal degree in co-relation 237339. Up to 115463 conditions per place. [2023-09-01 02:34:34,855 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 46 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-09-01 02:34:34,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 54 transitions, 223 flow [2023-09-01 02:34:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-09-01 02:34:34,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47451963241436923 [2023-09-01 02:34:34,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-09-01 02:34:34,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-09-01 02:34:34,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:34,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-09-01 02:34:34,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:34,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:34,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:34,869 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 133 flow. Second operand 3 states and 568 transitions. [2023-09-01 02:34:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 54 transitions, 223 flow [2023-09-01 02:34:34,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 54 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:34,870 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 130 flow [2023-09-01 02:34:34,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-09-01 02:34:34,871 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -22 predicate places. [2023-09-01 02:34:34,871 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 130 flow [2023-09-01 02:34:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:34,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:34,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:34,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 02:34:34,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:34,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1569875366, now seen corresponding path program 1 times [2023-09-01 02:34:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352985515] [2023-09-01 02:34:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:34,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352985515] [2023-09-01 02:34:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352985515] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:34,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367824691] [2023-09-01 02:34:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:34,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2023-09-01 02:34:34,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:34,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:34,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2023-09-01 02:34:34,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:40,236 INFO L130 PetriNetUnfolder]: 88749/115376 cut-off events. [2023-09-01 02:34:40,236 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:40,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227346 conditions, 115376 events. 88749/115376 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 4706. Compared 715427 event pairs, 88749 based on Foata normal form. 0/106837 useless extension candidates. Maximal degree in co-relation 227342. Up to 110592 conditions per place. [2023-09-01 02:34:41,000 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 44 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 02:34:41,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 52 transitions, 216 flow [2023-09-01 02:34:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-09-01 02:34:41,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928989139515455 [2023-09-01 02:34:41,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-09-01 02:34:41,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-09-01 02:34:41,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:41,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-09-01 02:34:41,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:41,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:41,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:41,022 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 130 flow. Second operand 3 states and 590 transitions. [2023-09-01 02:34:41,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 52 transitions, 216 flow [2023-09-01 02:34:41,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 52 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:41,023 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 127 flow [2023-09-01 02:34:41,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-09-01 02:34:41,024 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -23 predicate places. [2023-09-01 02:34:41,024 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 127 flow [2023-09-01 02:34:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:41,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:41,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:41,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:34:41,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:41,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1116684260, now seen corresponding path program 1 times [2023-09-01 02:34:41,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:41,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517959685] [2023-09-01 02:34:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:41,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:41,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517959685] [2023-09-01 02:34:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517959685] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:41,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:41,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22058154] [2023-09-01 02:34:41,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:41,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:41,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2023-09-01 02:34:41,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:41,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:41,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2023-09-01 02:34:41,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:45,464 INFO L130 PetriNetUnfolder]: 70317/91824 cut-off events. [2023-09-01 02:34:45,465 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:45,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181267 conditions, 91824 events. 70317/91824 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 3631. Compared 560378 event pairs, 70317 based on Foata normal form. 0/87381 useless extension candidates. Maximal degree in co-relation 181263. Up to 88064 conditions per place. [2023-09-01 02:34:46,029 INFO L137 encePairwiseOnDemand]: 397/399 looper letters, 43 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 02:34:46,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 51 transitions, 213 flow [2023-09-01 02:34:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-09-01 02:34:46,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-09-01 02:34:46,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-09-01 02:34:46,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-09-01 02:34:46,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:46,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-09-01 02:34:46,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:46,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:46,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:46,042 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 127 flow. Second operand 3 states and 567 transitions. [2023-09-01 02:34:46,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 51 transitions, 213 flow [2023-09-01 02:34:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 51 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:46,044 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 126 flow [2023-09-01 02:34:46,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2023-09-01 02:34:46,045 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -23 predicate places. [2023-09-01 02:34:46,045 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 126 flow [2023-09-01 02:34:46,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:46,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:46,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:46,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 02:34:46,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:46,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1116684261, now seen corresponding path program 1 times [2023-09-01 02:34:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:46,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191651838] [2023-09-01 02:34:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:46,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:46,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:46,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191651838] [2023-09-01 02:34:46,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191651838] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:46,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:46,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:34:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085555143] [2023-09-01 02:34:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:34:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:34:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:34:46,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 399 [2023-09-01 02:34:46,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:46,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:46,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 399 [2023-09-01 02:34:46,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:49,597 INFO L130 PetriNetUnfolder]: 51885/68272 cut-off events. [2023-09-01 02:34:49,598 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 02:34:49,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135188 conditions, 68272 events. 51885/68272 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 2580. Compared 409343 event pairs, 51885 based on Foata normal form. 0/67925 useless extension candidates. Maximal degree in co-relation 135184. Up to 65536 conditions per place. [2023-09-01 02:34:50,000 INFO L137 encePairwiseOnDemand]: 397/399 looper letters, 42 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-09-01 02:34:50,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 50 transitions, 210 flow [2023-09-01 02:34:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:34:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:34:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-09-01 02:34:50,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202172096908939 [2023-09-01 02:34:50,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-09-01 02:34:50,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-09-01 02:34:50,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:50,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-09-01 02:34:50,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:50,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:50,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:50,005 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 126 flow. Second operand 3 states and 503 transitions. [2023-09-01 02:34:50,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 50 transitions, 210 flow [2023-09-01 02:34:50,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 50 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:50,006 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 125 flow [2023-09-01 02:34:50,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2023-09-01 02:34:50,007 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -23 predicate places. [2023-09-01 02:34:50,007 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 125 flow [2023-09-01 02:34:50,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:50,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:50,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 02:34:50,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:34:50,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 715616713, now seen corresponding path program 1 times [2023-09-01 02:34:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:50,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897387778] [2023-09-01 02:34:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:51,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897387778] [2023-09-01 02:34:51,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897387778] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:51,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:51,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:34:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266567297] [2023-09-01 02:34:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:34:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:34:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:34:51,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 399 [2023-09-01 02:34:51,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 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) [2023-09-01 02:34:51,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:51,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 399 [2023-09-01 02:34:51,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:35:10,157 INFO L130 PetriNetUnfolder]: 340125/423387 cut-off events. [2023-09-01 02:35:10,158 INFO L131 PetriNetUnfolder]: For 5903/5903 co-relation queries the response was YES. [2023-09-01 02:35:11,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853457 conditions, 423387 events. 340125/423387 cut-off events. For 5903/5903 co-relation queries the response was YES. Maximal size of possible extension queue 7868. Compared 2338595 event pairs, 87704 based on Foata normal form. 1/423388 useless extension candidates. Maximal degree in co-relation 853453. Up to 222239 conditions per place. [2023-09-01 02:35:12,511 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 143 selfloop transitions, 18 changer transitions 17/178 dead transitions. [2023-09-01 02:35:12,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 178 transitions, 761 flow [2023-09-01 02:35:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:35:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:35:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1229 transitions. [2023-09-01 02:35:12,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133667502088555 [2023-09-01 02:35:12,514 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1229 transitions. [2023-09-01 02:35:12,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1229 transitions. [2023-09-01 02:35:12,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:35:12,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1229 transitions. [2023-09-01 02:35:12,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.83333333333334) internal successors, (1229), 6 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:12,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:12,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:12,519 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 125 flow. Second operand 6 states and 1229 transitions. [2023-09-01 02:35:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 178 transitions, 761 flow [2023-09-01 02:35:12,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 178 transitions, 760 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:35:12,522 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 246 flow [2023-09-01 02:35:12,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-09-01 02:35:12,522 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -16 predicate places. [2023-09-01 02:35:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 246 flow [2023-09-01 02:35:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 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) [2023-09-01 02:35:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:35:12,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:35:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 02:35:12,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:35:12,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:35:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1348256613, now seen corresponding path program 2 times [2023-09-01 02:35:12,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:35:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361675278] [2023-09-01 02:35:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:35:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:35:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:35:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:35:12,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361675278] [2023-09-01 02:35:12,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361675278] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:35:12,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:35:12,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 02:35:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845187891] [2023-09-01 02:35:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:35:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:35:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:35:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:35:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:35:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 399 [2023-09-01 02:35:12,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 183.77777777777777) internal successors, (1654), 9 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:12,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:35:12,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 399 [2023-09-01 02:35:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:35:22,160 INFO L130 PetriNetUnfolder]: 115642/156768 cut-off events. [2023-09-01 02:35:22,161 INFO L131 PetriNetUnfolder]: For 6360/7184 co-relation queries the response was YES. [2023-09-01 02:35:22,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324048 conditions, 156768 events. 115642/156768 cut-off events. For 6360/7184 co-relation queries the response was YES. Maximal size of possible extension queue 6757. Compared 1093039 event pairs, 21836 based on Foata normal form. 480/147130 useless extension candidates. Maximal degree in co-relation 324041. Up to 112830 conditions per place. [2023-09-01 02:35:23,460 INFO L137 encePairwiseOnDemand]: 385/399 looper letters, 189 selfloop transitions, 93 changer transitions 0/310 dead transitions. [2023-09-01 02:35:23,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 310 transitions, 1321 flow [2023-09-01 02:35:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:35:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:35:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2611 transitions. [2023-09-01 02:35:23,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033738191632928 [2023-09-01 02:35:23,469 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2611 transitions. [2023-09-01 02:35:23,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2611 transitions. [2023-09-01 02:35:23,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:35:23,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2611 transitions. [2023-09-01 02:35:23,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 200.84615384615384) internal successors, (2611), 13 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:23,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:23,491 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:23,491 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 246 flow. Second operand 13 states and 2611 transitions. [2023-09-01 02:35:23,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 310 transitions, 1321 flow [2023-09-01 02:35:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 310 transitions, 1313 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 02:35:28,057 INFO L231 Difference]: Finished difference. Result has 91 places, 181 transitions, 720 flow [2023-09-01 02:35:28,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=720, PETRI_PLACES=91, PETRI_TRANSITIONS=181} [2023-09-01 02:35:28,058 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -3 predicate places. [2023-09-01 02:35:28,059 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 181 transitions, 720 flow [2023-09-01 02:35:28,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 183.77777777777777) internal successors, (1654), 9 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:28,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:35:28,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:35:28,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 02:35:28,065 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:35:28,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:35:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1911156773, now seen corresponding path program 3 times [2023-09-01 02:35:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:35:28,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328684332] [2023-09-01 02:35:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:35:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:35:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:35:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:28,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:35:28,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328684332] [2023-09-01 02:35:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328684332] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:35:28,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:35:28,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:35:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732591610] [2023-09-01 02:35:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:35:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:35:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:35:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:35:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:35:28,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2023-09-01 02:35:28,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 181 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 184.14285714285714) internal successors, (1289), 7 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:28,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:35:28,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2023-09-01 02:35:28,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:35:55,447 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([625] L147-->L150: Formula: (= v_~b~0_9 (ite (= (ite (or (not (= (mod v_~b~0_10 256) 0)) (= v_~x~0_7 1)) 1 0) 0) 0 1)) InVars {~b~0=v_~b~0_10, ~x~0=v_~x~0_7} OutVars{~b~0=v_~b~0_9, ~x~0=v_~x~0_7} AuxVars[] AssignedVars[~b~0][327], [Black: 323#(and (<= 4 ~m5~0) (= ~m1~0 0) (<= 4 ~t~0) (= ~s~0 0)), 145#L131true, Black: 325#(and (<= 4 ~m5~0) (<= 4 ~t~0) (= ~s~0 0)), 276#(= (select |#valid| |ULTIMATE.start_main_~#t6~0#1.base|) 1), 213#L150true, 284#(and (<= (+ |ULTIMATE.start_main_~#t1~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|)) (< 0 (+ |ULTIMATE.start_main_~#t1~0#1.offset| 1))), 239#true, 87#L93true, 167#thread1EXITtrue, 214#L74true, 260#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 244#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 280#(and (= (select |#length| |ULTIMATE.start_main_~#t6~0#1.base|) 4) (= |ULTIMATE.start_main_~#t6~0#1.offset| 0)), 272#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t5~0#1.base|)) (= |ULTIMATE.start_main_~#t5~0#1.offset| 0)), 264#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 333#(<= (+ ~s~0 1) ~t~0), 256#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 248#(and (<= 0 |ULTIMATE.start_main_~#t2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t2~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|))), 62#L181-4true, 252#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), 295#true, Black: 297#(= (+ (* (div ~b~0 256) 256) (* (div (+ (* (- 256) (div ~b~0 256)) ~b~0) 4294967296) 4294967296)) ~b~0), Black: 300#(and (<= ~b~0 0) (<= 0 ~b~0)), 140#thread4EXITtrue, 268#(= (select |#valid| |ULTIMATE.start_main_~#t5~0#1.base|) 1), 307#true, 293#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1)]) [2023-09-01 02:35:55,447 INFO L383 tUnfolder$Statistics]: this new event has 33 ancestors and is cut-off event [2023-09-01 02:35:55,447 INFO L386 tUnfolder$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-09-01 02:35:55,448 INFO L386 tUnfolder$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-09-01 02:35:55,448 INFO L386 tUnfolder$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-09-01 02:35:56,219 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([625] L147-->L150: Formula: (= v_~b~0_9 (ite (= (ite (or (not (= (mod v_~b~0_10 256) 0)) (= v_~x~0_7 1)) 1 0) 0) 0 1)) InVars {~b~0=v_~b~0_10, ~x~0=v_~x~0_7} OutVars{~b~0=v_~b~0_9, ~x~0=v_~x~0_7} AuxVars[] AssignedVars[~b~0][327], [145#L131true, Black: 323#(and (<= 4 ~m5~0) (= ~m1~0 0) (<= 4 ~t~0) (= ~s~0 0)), Black: 325#(and (<= 4 ~m5~0) (<= 4 ~t~0) (= ~s~0 0)), 213#L150true, 276#(= (select |#valid| |ULTIMATE.start_main_~#t6~0#1.base|) 1), 284#(and (<= (+ |ULTIMATE.start_main_~#t1~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|)) (< 0 (+ |ULTIMATE.start_main_~#t1~0#1.offset| 1))), 239#true, 87#L93true, 167#thread1EXITtrue, 260#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 214#L74true, 244#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 280#(and (= (select |#length| |ULTIMATE.start_main_~#t6~0#1.base|) 4) (= |ULTIMATE.start_main_~#t6~0#1.offset| 0)), 272#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t5~0#1.base|)) (= |ULTIMATE.start_main_~#t5~0#1.offset| 0)), 264#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 333#(<= (+ ~s~0 1) ~t~0), 256#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 248#(and (<= 0 |ULTIMATE.start_main_~#t2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t2~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|))), 252#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), 295#true, Black: 297#(= (+ (* (div ~b~0 256) 256) (* (div (+ (* (- 256) (div ~b~0 256)) ~b~0) 4294967296) 4294967296)) ~b~0), Black: 300#(and (<= ~b~0 0) (<= 0 ~b~0)), 140#thread4EXITtrue, 268#(= (select |#valid| |ULTIMATE.start_main_~#t5~0#1.base|) 1), 93#L182-1true, 293#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 307#true]) [2023-09-01 02:35:56,220 INFO L383 tUnfolder$Statistics]: this new event has 34 ancestors and is cut-off event [2023-09-01 02:35:56,220 INFO L386 tUnfolder$Statistics]: existing Event has 34 ancestors and is cut-off event [2023-09-01 02:35:56,220 INFO L386 tUnfolder$Statistics]: existing Event has 34 ancestors and is cut-off event [2023-09-01 02:35:56,220 INFO L386 tUnfolder$Statistics]: existing Event has 34 ancestors and is cut-off event [2023-09-01 02:35:57,307 INFO L130 PetriNetUnfolder]: 288482/399786 cut-off events. [2023-09-01 02:35:57,308 INFO L131 PetriNetUnfolder]: For 165027/190703 co-relation queries the response was YES. [2023-09-01 02:35:59,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044684 conditions, 399786 events. 288482/399786 cut-off events. For 165027/190703 co-relation queries the response was YES. Maximal size of possible extension queue 16198. Compared 3225399 event pairs, 48861 based on Foata normal form. 4854/378340 useless extension candidates. Maximal degree in co-relation 1044675. Up to 185401 conditions per place. [2023-09-01 02:36:01,580 INFO L137 encePairwiseOnDemand]: 385/399 looper letters, 223 selfloop transitions, 129 changer transitions 0/380 dead transitions. [2023-09-01 02:36:01,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 380 transitions, 2064 flow [2023-09-01 02:36:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:36:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:36:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1824 transitions. [2023-09-01 02:36:01,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-09-01 02:36:01,584 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1824 transitions. [2023-09-01 02:36:01,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1824 transitions. [2023-09-01 02:36:01,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:36:01,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1824 transitions. [2023-09-01 02:36:01,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.66666666666666) internal successors, (1824), 9 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:01,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:01,591 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:01,591 INFO L175 Difference]: Start difference. First operand has 91 places, 181 transitions, 720 flow. Second operand 9 states and 1824 transitions. [2023-09-01 02:36:01,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 380 transitions, 2064 flow [2023-09-01 02:36:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 380 transitions, 2064 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:36:36,899 INFO L231 Difference]: Finished difference. Result has 102 places, 233 transitions, 1377 flow [2023-09-01 02:36:36,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=102, PETRI_TRANSITIONS=233} [2023-09-01 02:36:36,899 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 8 predicate places. [2023-09-01 02:36:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 233 transitions, 1377 flow [2023-09-01 02:36:36,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.14285714285714) internal successors, (1289), 7 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:36,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:36:36,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:36:36,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 02:36:36,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 02:36:36,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:36:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1291435257, now seen corresponding path program 4 times [2023-09-01 02:36:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:36:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746019446] [2023-09-01 02:36:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:36:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:36:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:36:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:36:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:36:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746019446] [2023-09-01 02:36:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746019446] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:36:37,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:36:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:36:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449889294] [2023-09-01 02:36:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:36:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:36:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:36:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:36:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:36:37,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 399 [2023-09-01 02:36:37,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 233 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 185.375) internal successors, (1483), 8 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:37,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:36:37,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 399 [2023-09-01 02:36:37,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand