./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:08:51,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:08:51,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:08:51,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:08:51,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:08:51,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:08:51,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:08:51,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:08:51,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:08:51,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:08:51,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:08:51,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:08:51,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:08:51,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:08:51,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:08:51,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:08:51,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:08:51,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:08:51,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:08:51,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:08:51,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:08:51,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:08:51,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:08:51,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:08:51,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:08:51,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:08:51,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:08:51,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:08:51,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:08:51,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:08:51,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:08:51,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:08:51,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:08:51,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:08:51,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:08:51,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:08:51,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:08:51,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:08:51,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:08:51,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:08:51,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:08:51,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:08:51,546 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:08:51,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:08:51,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:08:51,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:08:51,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:08:51,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:08:51,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:08:51,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:08:51,549 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:08:51,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:08:51,550 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:08:51,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:08:51,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:08:51,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:08:51,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:08:51,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:08:51,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:08:51,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:08:51,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:08:51,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:08:51,552 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:08:51,552 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:08:51,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:08:51,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:08:51,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:08:51,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:08:51,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:08:51,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:08:51,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:08:51,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:08:51,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:08:51,554 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:08:51,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:08:51,555 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:08:51,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:08:51,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:08:51,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:08:51,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:08:51,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:08:51,858 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:08:51,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 07:08:53,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:08:53,309 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:08:53,310 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 07:08:53,317 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a13309c/3c78da9dc06a47caaaa1b2f04ee00cce/FLAG02878496e [2023-08-30 07:08:53,330 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a13309c/3c78da9dc06a47caaaa1b2f04ee00cce [2023-08-30 07:08:53,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:08:53,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:08:53,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:08:53,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:08:53,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:08:53,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd55950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53, skipping insertion in model container [2023-08-30 07:08:53,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:08:53,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:08:53,498 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/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 07:08:53,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:08:53,510 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:08:53,530 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/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 07:08:53,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:08:53,539 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:08:53,539 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:08:53,545 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:08:53,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53 WrapperNode [2023-08-30 07:08:53,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:08:53,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:08:53,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:08:53,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:08:53,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,593 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-30 07:08:53,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:08:53,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:08:53,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:08:53,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:08:53,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:08:53,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:08:53,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:08:53,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:08:53,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (1/1) ... [2023-08-30 07:08:53,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:08:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:08:53,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:08:53,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:08:53,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:08:53,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:08:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:08:53,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:08:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:08:53,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:08:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:08:53,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 07:08:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:08:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 07:08:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:08:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:08:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:08:53,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:08:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 07:08:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:08:53,722 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:08:53,832 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:08:53,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:08:54,175 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:08:54,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:08:54,252 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:08:54,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:08:54 BoogieIcfgContainer [2023-08-30 07:08:54,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:08:54,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:08:54,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:08:54,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:08:54,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:08:53" (1/3) ... [2023-08-30 07:08:54,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bc317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:08:54, skipping insertion in model container [2023-08-30 07:08:54,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:08:53" (2/3) ... [2023-08-30 07:08:54,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bc317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:08:54, skipping insertion in model container [2023-08-30 07:08:54,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:08:54" (3/3) ... [2023-08-30 07:08:54,261 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-30 07:08:54,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:08:54,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-30 07:08:54,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:08:54,355 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:08:54,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 07:08:54,472 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2023-08-30 07:08:54,473 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:54,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 07:08:54,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 07:08:54,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 224 flow [2023-08-30 07:08:54,486 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:08:54,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-30 07:08:54,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-30 07:08:54,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 224 flow [2023-08-30 07:08:54,542 INFO L130 PetriNetUnfolder]: 7/103 cut-off events. [2023-08-30 07:08:54,543 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:54,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 7/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 07:08:54,546 INFO L119 LiptonReduction]: Number of co-enabled transitions 1124 [2023-08-30 07:08:57,928 INFO L134 LiptonReduction]: Checked pairs total: 1820 [2023-08-30 07:08:57,928 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 07:08:57,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:08:57,945 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;@151aa064, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:08:57,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-30 07:08:57,947 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 07:08:57,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:08:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:57,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 07:08:57,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:57,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 430, now seen corresponding path program 1 times [2023-08-30 07:08:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:57,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896967975] [2023-08-30 07:08:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:58,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896967975] [2023-08-30 07:08:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896967975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:58,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 07:08:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199767801] [2023-08-30 07:08:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:58,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 07:08:58,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 07:08:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 07:08:58,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 205 [2023-08-30 07:08:58,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:58,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 205 [2023-08-30 07:08:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:58,168 INFO L130 PetriNetUnfolder]: 259/418 cut-off events. [2023-08-30 07:08:58,168 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 07:08:58,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 418 events. 259/418 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1804 event pairs, 203 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 684. Up to 411 conditions per place. [2023-08-30 07:08:58,173 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 29 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-08-30 07:08:58,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 142 flow [2023-08-30 07:08:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 07:08:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 07:08:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 224 transitions. [2023-08-30 07:08:58,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2023-08-30 07:08:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 224 transitions. [2023-08-30 07:08:58,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 224 transitions. [2023-08-30 07:08:58,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:58,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 224 transitions. [2023-08-30 07:08:58,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,196 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,197 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 2 states and 224 transitions. [2023-08-30 07:08:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 142 flow [2023-08-30 07:08:58,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:08:58,202 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 72 flow [2023-08-30 07:08:58,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-30 07:08:58,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-30 07:08:58,206 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 72 flow [2023-08-30 07:08:58,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:58,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:08:58,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 07:08:58,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:58,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash 423839, now seen corresponding path program 1 times [2023-08-30 07:08:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918004446] [2023-08-30 07:08:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:58,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918004446] [2023-08-30 07:08:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918004446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:58,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326593641] [2023-08-30 07:08:58,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:58,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 07:08:58,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:58,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 07:08:58,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:58,528 INFO L130 PetriNetUnfolder]: 247/397 cut-off events. [2023-08-30 07:08:58,529 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:58,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 397 events. 247/397 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1665 event pairs, 194 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 799. Up to 389 conditions per place. [2023-08-30 07:08:58,532 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 07:08:58,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 122 flow [2023-08-30 07:08:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-30 07:08:58,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 07:08:58,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-30 07:08:58,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-30 07:08:58,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:58,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-30 07:08:58,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,539 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 72 flow. Second operand 3 states and 287 transitions. [2023-08-30 07:08:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 122 flow [2023-08-30 07:08:58,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:08:58,541 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-08-30 07:08:58,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 07:08:58,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-30 07:08:58,542 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-08-30 07:08:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:58,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:08:58,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 07:08:58,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:58,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 423840, now seen corresponding path program 1 times [2023-08-30 07:08:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311599544] [2023-08-30 07:08:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311599544] [2023-08-30 07:08:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311599544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:58,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569476938] [2023-08-30 07:08:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:58,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-30 07:08:58,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:58,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-30 07:08:58,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:58,737 INFO L130 PetriNetUnfolder]: 235/376 cut-off events. [2023-08-30 07:08:58,738 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:58,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 376 events. 235/376 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1582 event pairs, 185 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 758. Up to 368 conditions per place. [2023-08-30 07:08:58,740 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 07:08:58,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2023-08-30 07:08:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-30 07:08:58,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2023-08-30 07:08:58,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-30 07:08:58,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-30 07:08:58,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:58,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-30 07:08:58,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,749 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 300 transitions. [2023-08-30 07:08:58,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2023-08-30 07:08:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:58,751 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 67 flow [2023-08-30 07:08:58,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-30 07:08:58,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-30 07:08:58,755 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 67 flow [2023-08-30 07:08:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:58,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:08:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 07:08:58,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:58,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 407320979, now seen corresponding path program 1 times [2023-08-30 07:08:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223536000] [2023-08-30 07:08:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223536000] [2023-08-30 07:08:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223536000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:58,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:58,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:58,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812977703] [2023-08-30 07:08:58,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:58,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:58,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:58,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:58,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 07:08:58,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:58,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 07:08:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:58,909 INFO L130 PetriNetUnfolder]: 221/351 cut-off events. [2023-08-30 07:08:58,910 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:58,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 351 events. 221/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1431 event pairs, 172 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 709. Up to 343 conditions per place. [2023-08-30 07:08:58,913 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 22 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-30 07:08:58,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 109 flow [2023-08-30 07:08:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-30 07:08:58,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016260162601624 [2023-08-30 07:08:58,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-30 07:08:58,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-30 07:08:58,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:58,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-30 07:08:58,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,922 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 67 flow. Second operand 3 states and 283 transitions. [2023-08-30 07:08:58,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 109 flow [2023-08-30 07:08:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:58,924 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 64 flow [2023-08-30 07:08:58,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-30 07:08:58,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2023-08-30 07:08:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 64 flow [2023-08-30 07:08:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:58,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:08:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 07:08:58,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:58,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 407320978, now seen corresponding path program 1 times [2023-08-30 07:08:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271645553] [2023-08-30 07:08:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:59,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:59,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271645553] [2023-08-30 07:08:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271645553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:59,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264272992] [2023-08-30 07:08:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:59,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-30 07:08:59,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:59,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-30 07:08:59,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:59,108 INFO L130 PetriNetUnfolder]: 207/326 cut-off events. [2023-08-30 07:08:59,108 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:59,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 326 events. 207/326 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1284 event pairs, 159 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 660. Up to 318 conditions per place. [2023-08-30 07:08:59,113 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 20 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 07:08:59,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 102 flow [2023-08-30 07:08:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-30 07:08:59,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813008130081301 [2023-08-30 07:08:59,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-30 07:08:59,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-30 07:08:59,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:59,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-30 07:08:59,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,118 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 64 flow. Second operand 3 states and 296 transitions. [2023-08-30 07:08:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 102 flow [2023-08-30 07:08:59,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:59,120 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 61 flow [2023-08-30 07:08:59,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-30 07:08:59,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 07:08:59,121 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 61 flow [2023-08-30 07:08:59,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:59,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:59,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 07:08:59,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:59,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash 593447536, now seen corresponding path program 1 times [2023-08-30 07:08:59,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:59,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66962599] [2023-08-30 07:08:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:59,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:59,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66962599] [2023-08-30 07:08:59,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66962599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:59,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:59,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:08:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157395430] [2023-08-30 07:08:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:08:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:08:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:08:59,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 205 [2023-08-30 07:08:59,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:59,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 205 [2023-08-30 07:08:59,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:59,344 INFO L130 PetriNetUnfolder]: 165/266 cut-off events. [2023-08-30 07:08:59,344 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:59,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 266 events. 165/266 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 999 event pairs, 126 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 541. Up to 258 conditions per place. [2023-08-30 07:08:59,346 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 19 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 07:08:59,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 99 flow [2023-08-30 07:08:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-30 07:08:59,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2023-08-30 07:08:59,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-30 07:08:59,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-30 07:08:59,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:59,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-30 07:08:59,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,351 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 61 flow. Second operand 3 states and 255 transitions. [2023-08-30 07:08:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 99 flow [2023-08-30 07:08:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:59,352 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 60 flow [2023-08-30 07:08:59,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-30 07:08:59,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 07:08:59,353 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 60 flow [2023-08-30 07:08:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:59,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:59,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 07:08:59,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:59,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 593447537, now seen corresponding path program 1 times [2023-08-30 07:08:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:59,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361988772] [2023-08-30 07:08:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:59,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:59,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361988772] [2023-08-30 07:08:59,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361988772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:59,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:59,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228318309] [2023-08-30 07:08:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:59,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:59,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:08:59,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:59,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:08:59,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:59,454 INFO L130 PetriNetUnfolder]: 123/206 cut-off events. [2023-08-30 07:08:59,454 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:08:59,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 206 events. 123/206 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 720 event pairs, 93 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 422. Up to 198 conditions per place. [2023-08-30 07:08:59,456 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 18 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-30 07:08:59,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 96 flow [2023-08-30 07:08:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-08-30 07:08:59,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45691056910569106 [2023-08-30 07:08:59,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-08-30 07:08:59,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-08-30 07:08:59,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:59,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-08-30 07:08:59,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,461 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 60 flow. Second operand 3 states and 281 transitions. [2023-08-30 07:08:59,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 96 flow [2023-08-30 07:08:59,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:59,462 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 59 flow [2023-08-30 07:08:59,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 07:08:59,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 07:08:59,463 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 59 flow [2023-08-30 07:08:59,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:59,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:59,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 07:08:59,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:59,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash -578122106, now seen corresponding path program 1 times [2023-08-30 07:08:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708114352] [2023-08-30 07:08:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:08:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:08:59,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:08:59,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708114352] [2023-08-30 07:08:59,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708114352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:59,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:59,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:08:59,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71088498] [2023-08-30 07:08:59,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:59,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:08:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:08:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:08:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:08:59,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 205 [2023-08-30 07:08:59,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:59,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 205 [2023-08-30 07:08:59,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:59,746 INFO L130 PetriNetUnfolder]: 271/426 cut-off events. [2023-08-30 07:08:59,747 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:08:59,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 426 events. 271/426 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1513 event pairs, 37 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 836. Up to 309 conditions per place. [2023-08-30 07:08:59,749 INFO L137 encePairwiseOnDemand]: 200/205 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-30 07:08:59,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 166 flow [2023-08-30 07:08:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:08:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:08:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-30 07:08:59,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2023-08-30 07:08:59,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-30 07:08:59,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-30 07:08:59,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:59,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-30 07:08:59,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,754 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 59 flow. Second operand 3 states and 324 transitions. [2023-08-30 07:08:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 166 flow [2023-08-30 07:08:59,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:59,757 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 84 flow [2023-08-30 07:08:59,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 07:08:59,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-30 07:08:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 84 flow [2023-08-30 07:08:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:59,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 07:08:59,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:08:59,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -684329553, now seen corresponding path program 1 times [2023-08-30 07:08:59,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:08:59,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129150590] [2023-08-30 07:08:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:08:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:08:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:00,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129150590] [2023-08-30 07:09:00,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129150590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:00,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:00,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:09:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504539816] [2023-08-30 07:09:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:00,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:09:00,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:09:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:09:00,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:00,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:00,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:00,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:00,398 INFO L130 PetriNetUnfolder]: 405/626 cut-off events. [2023-08-30 07:09:00,399 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2023-08-30 07:09:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 626 events. 405/626 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2478 event pairs, 23 based on Foata normal form. 32/648 useless extension candidates. Maximal degree in co-relation 1490. Up to 229 conditions per place. [2023-08-30 07:09:00,402 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 67 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2023-08-30 07:09:00,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 88 transitions, 423 flow [2023-08-30 07:09:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:09:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:09:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 869 transitions. [2023-08-30 07:09:00,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47100271002710026 [2023-08-30 07:09:00,405 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 869 transitions. [2023-08-30 07:09:00,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 869 transitions. [2023-08-30 07:09:00,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:00,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 869 transitions. [2023-08-30 07:09:00,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.55555555555556) internal successors, (869), 9 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,411 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,411 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 84 flow. Second operand 9 states and 869 transitions. [2023-08-30 07:09:00,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 88 transitions, 423 flow [2023-08-30 07:09:00,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 88 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:09:00,413 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 219 flow [2023-08-30 07:09:00,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=219, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 07:09:00,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 07:09:00,414 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 219 flow [2023-08-30 07:09:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:00,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:09:00,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 07:09:00,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:00,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1435029477, now seen corresponding path program 2 times [2023-08-30 07:09:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:00,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67420769] [2023-08-30 07:09:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:00,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67420769] [2023-08-30 07:09:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67420769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:00,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:00,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:00,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758539180] [2023-08-30 07:09:00,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:00,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:00,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:00,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:00,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:00,800 INFO L130 PetriNetUnfolder]: 617/958 cut-off events. [2023-08-30 07:09:00,800 INFO L131 PetriNetUnfolder]: For 1455/1461 co-relation queries the response was YES. [2023-08-30 07:09:00,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 958 events. 617/958 cut-off events. For 1455/1461 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4216 event pairs, 21 based on Foata normal form. 20/968 useless extension candidates. Maximal degree in co-relation 3138. Up to 348 conditions per place. [2023-08-30 07:09:00,806 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 72 selfloop transitions, 15 changer transitions 3/92 dead transitions. [2023-08-30 07:09:00,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 92 transitions, 572 flow [2023-08-30 07:09:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 603 transitions. [2023-08-30 07:09:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902439024390244 [2023-08-30 07:09:00,809 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 603 transitions. [2023-08-30 07:09:00,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 603 transitions. [2023-08-30 07:09:00,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:00,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 603 transitions. [2023-08-30 07:09:00,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.5) internal successors, (603), 6 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,812 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,813 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 219 flow. Second operand 6 states and 603 transitions. [2023-08-30 07:09:00,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 92 transitions, 572 flow [2023-08-30 07:09:00,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 568 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 07:09:00,819 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 290 flow [2023-08-30 07:09:00,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-30 07:09:00,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-30 07:09:00,820 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 290 flow [2023-08-30 07:09:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:00,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:09:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 07:09:00,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:00,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1558720693, now seen corresponding path program 3 times [2023-08-30 07:09:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:00,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137956356] [2023-08-30 07:09:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137956356] [2023-08-30 07:09:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137956356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:00,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:00,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064372194] [2023-08-30 07:09:00,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 07:09:01,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:01,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 07:09:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:01,217 INFO L130 PetriNetUnfolder]: 720/1121 cut-off events. [2023-08-30 07:09:01,217 INFO L131 PetriNetUnfolder]: For 3019/3041 co-relation queries the response was YES. [2023-08-30 07:09:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 1121 events. 720/1121 cut-off events. For 3019/3041 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5082 event pairs, 107 based on Foata normal form. 28/1127 useless extension candidates. Maximal degree in co-relation 4166. Up to 799 conditions per place. [2023-08-30 07:09:01,227 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 57 selfloop transitions, 18 changer transitions 3/80 dead transitions. [2023-08-30 07:09:01,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 619 flow [2023-08-30 07:09:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 588 transitions. [2023-08-30 07:09:01,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2023-08-30 07:09:01,230 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 588 transitions. [2023-08-30 07:09:01,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 588 transitions. [2023-08-30 07:09:01,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:01,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 588 transitions. [2023-08-30 07:09:01,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.0) internal successors, (588), 6 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,234 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,234 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 290 flow. Second operand 6 states and 588 transitions. [2023-08-30 07:09:01,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 619 flow [2023-08-30 07:09:01,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 601 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:09:01,241 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 397 flow [2023-08-30 07:09:01,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-30 07:09:01,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2023-08-30 07:09:01,242 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 397 flow [2023-08-30 07:09:01,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:01,243 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] [2023-08-30 07:09:01,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 07:09:01,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:01,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash -18309602, now seen corresponding path program 1 times [2023-08-30 07:09:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:01,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129094907] [2023-08-30 07:09:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:01,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129094907] [2023-08-30 07:09:01,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129094907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:01,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:09:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100077485] [2023-08-30 07:09:01,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:01,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:01,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:01,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 07:09:01,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:01,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 07:09:01,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:01,793 INFO L130 PetriNetUnfolder]: 1150/1833 cut-off events. [2023-08-30 07:09:01,794 INFO L131 PetriNetUnfolder]: For 6869/6869 co-relation queries the response was YES. [2023-08-30 07:09:01,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7348 conditions, 1833 events. 1150/1833 cut-off events. For 6869/6869 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8632 event pairs, 369 based on Foata normal form. 38/1871 useless extension candidates. Maximal degree in co-relation 7330. Up to 1027 conditions per place. [2023-08-30 07:09:01,807 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 71 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2023-08-30 07:09:01,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 794 flow [2023-08-30 07:09:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:09:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:09:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-08-30 07:09:01,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49365853658536585 [2023-08-30 07:09:01,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-08-30 07:09:01,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-08-30 07:09:01,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:01,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-08-30 07:09:01,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,813 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 397 flow. Second operand 5 states and 506 transitions. [2023-08-30 07:09:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 794 flow [2023-08-30 07:09:01,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 757 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 07:09:01,826 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 515 flow [2023-08-30 07:09:01,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-30 07:09:01,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2023-08-30 07:09:01,827 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 515 flow [2023-08-30 07:09:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:01,828 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] [2023-08-30 07:09:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 07:09:01,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:01,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash -293890740, now seen corresponding path program 2 times [2023-08-30 07:09:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:01,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543875527] [2023-08-30 07:09:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543875527] [2023-08-30 07:09:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543875527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:02,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:02,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:09:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806098132] [2023-08-30 07:09:02,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:02,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:02,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:02,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:02,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:02,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:02,484 INFO L130 PetriNetUnfolder]: 1528/2436 cut-off events. [2023-08-30 07:09:02,485 INFO L131 PetriNetUnfolder]: For 15179/15179 co-relation queries the response was YES. [2023-08-30 07:09:02,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11221 conditions, 2436 events. 1528/2436 cut-off events. For 15179/15179 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12459 event pairs, 252 based on Foata normal form. 28/2464 useless extension candidates. Maximal degree in co-relation 11200. Up to 994 conditions per place. [2023-08-30 07:09:02,506 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 112 selfloop transitions, 62 changer transitions 9/183 dead transitions. [2023-08-30 07:09:02,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 183 transitions, 1980 flow [2023-08-30 07:09:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 597 transitions. [2023-08-30 07:09:02,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2023-08-30 07:09:02,508 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 597 transitions. [2023-08-30 07:09:02,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 597 transitions. [2023-08-30 07:09:02,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:02,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 597 transitions. [2023-08-30 07:09:02,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,512 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 515 flow. Second operand 6 states and 597 transitions. [2023-08-30 07:09:02,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 183 transitions, 1980 flow [2023-08-30 07:09:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 1872 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 07:09:02,537 INFO L231 Difference]: Finished difference. Result has 74 places, 114 transitions, 1344 flow [2023-08-30 07:09:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1344, PETRI_PLACES=74, PETRI_TRANSITIONS=114} [2023-08-30 07:09:02,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2023-08-30 07:09:02,538 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 114 transitions, 1344 flow [2023-08-30 07:09:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:02,538 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] [2023-08-30 07:09:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 07:09:02,539 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:02,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash -727404288, now seen corresponding path program 1 times [2023-08-30 07:09:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130496879] [2023-08-30 07:09:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:02,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:02,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130496879] [2023-08-30 07:09:02,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130496879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:02,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:02,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288310624] [2023-08-30 07:09:02,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:02,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:02,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 114 transitions, 1344 flow. Second operand has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:02,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:02,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:02,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:03,117 INFO L130 PetriNetUnfolder]: 1598/2577 cut-off events. [2023-08-30 07:09:03,117 INFO L131 PetriNetUnfolder]: For 18880/19095 co-relation queries the response was YES. [2023-08-30 07:09:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13882 conditions, 2577 events. 1598/2577 cut-off events. For 18880/19095 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13830 event pairs, 235 based on Foata normal form. 307/2874 useless extension candidates. Maximal degree in co-relation 13857. Up to 1829 conditions per place. [2023-08-30 07:09:03,141 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 139 selfloop transitions, 22 changer transitions 5/170 dead transitions. [2023-08-30 07:09:03,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 170 transitions, 2167 flow [2023-08-30 07:09:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:09:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:09:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 496 transitions. [2023-08-30 07:09:03,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48390243902439023 [2023-08-30 07:09:03,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 496 transitions. [2023-08-30 07:09:03,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 496 transitions. [2023-08-30 07:09:03,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:03,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 496 transitions. [2023-08-30 07:09:03,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.2) internal successors, (496), 5 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:03,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:03,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:03,147 INFO L175 Difference]: Start difference. First operand has 74 places, 114 transitions, 1344 flow. Second operand 5 states and 496 transitions. [2023-08-30 07:09:03,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 170 transitions, 2167 flow [2023-08-30 07:09:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 170 transitions, 2167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:09:03,189 INFO L231 Difference]: Finished difference. Result has 79 places, 117 transitions, 1434 flow [2023-08-30 07:09:03,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1434, PETRI_PLACES=79, PETRI_TRANSITIONS=117} [2023-08-30 07:09:03,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2023-08-30 07:09:03,189 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 117 transitions, 1434 flow [2023-08-30 07:09:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:03,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:03,190 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] [2023-08-30 07:09:03,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 07:09:03,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:03,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1318677548, now seen corresponding path program 3 times [2023-08-30 07:09:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782110616] [2023-08-30 07:09:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782110616] [2023-08-30 07:09:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782110616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:03,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:03,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:09:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894172586] [2023-08-30 07:09:03,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:03,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:03,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 117 transitions, 1434 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:03,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:03,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:03,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:03,975 INFO L130 PetriNetUnfolder]: 1936/3114 cut-off events. [2023-08-30 07:09:03,975 INFO L131 PetriNetUnfolder]: For 21931/21931 co-relation queries the response was YES. [2023-08-30 07:09:03,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 3114 events. 1936/3114 cut-off events. For 21931/21931 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16620 event pairs, 519 based on Foata normal form. 34/3148 useless extension candidates. Maximal degree in co-relation 16769. Up to 1594 conditions per place. [2023-08-30 07:09:04,004 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 90 selfloop transitions, 86 changer transitions 7/183 dead transitions. [2023-08-30 07:09:04,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 183 transitions, 2263 flow [2023-08-30 07:09:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 596 transitions. [2023-08-30 07:09:04,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2023-08-30 07:09:04,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 596 transitions. [2023-08-30 07:09:04,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 596 transitions. [2023-08-30 07:09:04,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:04,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 596 transitions. [2023-08-30 07:09:04,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:04,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:04,011 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:04,011 INFO L175 Difference]: Start difference. First operand has 79 places, 117 transitions, 1434 flow. Second operand 6 states and 596 transitions. [2023-08-30 07:09:04,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 183 transitions, 2263 flow [2023-08-30 07:09:04,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 183 transitions, 2237 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:09:04,065 INFO L231 Difference]: Finished difference. Result has 86 places, 126 transitions, 1809 flow [2023-08-30 07:09:04,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1809, PETRI_PLACES=86, PETRI_TRANSITIONS=126} [2023-08-30 07:09:04,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2023-08-30 07:09:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 126 transitions, 1809 flow [2023-08-30 07:09:04,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:04,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:04,066 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] [2023-08-30 07:09:04,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 07:09:04,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:04,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1610920218, now seen corresponding path program 4 times [2023-08-30 07:09:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:04,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198397187] [2023-08-30 07:09:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198397187] [2023-08-30 07:09:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198397187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347055596] [2023-08-30 07:09:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:09:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:04,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:04,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 07:09:04,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:09:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:09:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:09:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:04,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347055596] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:04,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:09:04,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-08-30 07:09:04,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735031970] [2023-08-30 07:09:04,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:04,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:09:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:09:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 07:09:04,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:09:04,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 126 transitions, 1809 flow. Second operand has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:04,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:04,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:09:04,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:05,751 INFO L130 PetriNetUnfolder]: 3322/5411 cut-off events. [2023-08-30 07:09:05,751 INFO L131 PetriNetUnfolder]: For 47678/47678 co-relation queries the response was YES. [2023-08-30 07:09:05,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31615 conditions, 5411 events. 3322/5411 cut-off events. For 47678/47678 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32867 event pairs, 277 based on Foata normal form. 28/5439 useless extension candidates. Maximal degree in co-relation 31585. Up to 1684 conditions per place. [2023-08-30 07:09:05,869 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 130 selfloop transitions, 167 changer transitions 1/298 dead transitions. [2023-08-30 07:09:05,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 298 transitions, 4314 flow [2023-08-30 07:09:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:09:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:09:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2023-08-30 07:09:05,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2023-08-30 07:09:05,871 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2023-08-30 07:09:05,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2023-08-30 07:09:05,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:05,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2023-08-30 07:09:05,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:05,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 205.0) internal successors, (1640), 8 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:05,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 205.0) internal successors, (1640), 8 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:05,877 INFO L175 Difference]: Start difference. First operand has 86 places, 126 transitions, 1809 flow. Second operand 7 states and 680 transitions. [2023-08-30 07:09:05,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 298 transitions, 4314 flow [2023-08-30 07:09:05,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 298 transitions, 4306 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 07:09:05,991 INFO L231 Difference]: Finished difference. Result has 98 places, 218 transitions, 3884 flow [2023-08-30 07:09:05,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3884, PETRI_PLACES=98, PETRI_TRANSITIONS=218} [2023-08-30 07:09:05,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2023-08-30 07:09:05,992 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 218 transitions, 3884 flow [2023-08-30 07:09:05,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:05,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:05,992 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] [2023-08-30 07:09:06,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 07:09:06,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:06,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1335640178, now seen corresponding path program 5 times [2023-08-30 07:09:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024804001] [2023-08-30 07:09:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024804001] [2023-08-30 07:09:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024804001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070037064] [2023-08-30 07:09:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:09:06,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:06,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 07:09:06,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:09:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:09:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:09:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:06,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:07,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070037064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:07,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:09:07,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 07:09:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19136106] [2023-08-30 07:09:07,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 07:09:07,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 07:09:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-30 07:09:07,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-08-30 07:09:07,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 218 transitions, 3884 flow. Second operand has 13 states, 13 states have (on average 87.61538461538461) internal successors, (1139), 13 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:07,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:07,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-08-30 07:09:07,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:08,740 INFO L130 PetriNetUnfolder]: 4704/7488 cut-off events. [2023-08-30 07:09:08,741 INFO L131 PetriNetUnfolder]: For 95389/95389 co-relation queries the response was YES. [2023-08-30 07:09:08,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51511 conditions, 7488 events. 4704/7488 cut-off events. For 95389/95389 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45748 event pairs, 303 based on Foata normal form. 89/7577 useless extension candidates. Maximal degree in co-relation 51475. Up to 2387 conditions per place. [2023-08-30 07:09:08,885 INFO L137 encePairwiseOnDemand]: 194/205 looper letters, 190 selfloop transitions, 268 changer transitions 22/480 dead transitions. [2023-08-30 07:09:08,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 480 transitions, 7762 flow [2023-08-30 07:09:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:09:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:09:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1545 transitions. [2023-08-30 07:09:08,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47103658536585363 [2023-08-30 07:09:08,890 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1545 transitions. [2023-08-30 07:09:08,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1545 transitions. [2023-08-30 07:09:08,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:08,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1545 transitions. [2023-08-30 07:09:08,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 96.5625) internal successors, (1545), 16 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:08,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:08,899 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:08,899 INFO L175 Difference]: Start difference. First operand has 98 places, 218 transitions, 3884 flow. Second operand 16 states and 1545 transitions. [2023-08-30 07:09:08,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 480 transitions, 7762 flow [2023-08-30 07:09:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 480 transitions, 7662 flow, removed 50 selfloop flow, removed 0 redundant places. [2023-08-30 07:09:09,189 INFO L231 Difference]: Finished difference. Result has 122 places, 322 transitions, 6668 flow [2023-08-30 07:09:09,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6668, PETRI_PLACES=122, PETRI_TRANSITIONS=322} [2023-08-30 07:09:09,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2023-08-30 07:09:09,190 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 322 transitions, 6668 flow [2023-08-30 07:09:09,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 87.61538461538461) internal successors, (1139), 13 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:09,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:09,191 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] [2023-08-30 07:09:09,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:09,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 07:09:09,396 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:09,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash -286692026, now seen corresponding path program 6 times [2023-08-30 07:09:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:09,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144225550] [2023-08-30 07:09:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:09,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:09,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144225550] [2023-08-30 07:09:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144225550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:09,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:09,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:09,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359536135] [2023-08-30 07:09:09,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:09,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:09,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 07:09:09,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 322 transitions, 6668 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:09,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:09,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 07:09:09,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:11,165 INFO L130 PetriNetUnfolder]: 4887/7820 cut-off events. [2023-08-30 07:09:11,165 INFO L131 PetriNetUnfolder]: For 141148/141171 co-relation queries the response was YES. [2023-08-30 07:09:11,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60274 conditions, 7820 events. 4887/7820 cut-off events. For 141148/141171 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47976 event pairs, 1035 based on Foata normal form. 246/8066 useless extension candidates. Maximal degree in co-relation 60229. Up to 5721 conditions per place. [2023-08-30 07:09:11,245 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 219 selfloop transitions, 40 changer transitions 13/405 dead transitions. [2023-08-30 07:09:11,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 405 transitions, 8388 flow [2023-08-30 07:09:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:09:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:09:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2023-08-30 07:09:11,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49073170731707316 [2023-08-30 07:09:11,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2023-08-30 07:09:11,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2023-08-30 07:09:11,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:11,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2023-08-30 07:09:11,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 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) [2023-08-30 07:09:11,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:11,251 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:11,251 INFO L175 Difference]: Start difference. First operand has 122 places, 322 transitions, 6668 flow. Second operand 5 states and 503 transitions. [2023-08-30 07:09:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 405 transitions, 8388 flow [2023-08-30 07:09:11,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 405 transitions, 8151 flow, removed 57 selfloop flow, removed 4 redundant places. [2023-08-30 07:09:11,685 INFO L231 Difference]: Finished difference. Result has 124 places, 335 transitions, 6810 flow [2023-08-30 07:09:11,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6810, PETRI_PLACES=124, PETRI_TRANSITIONS=335} [2023-08-30 07:09:11,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2023-08-30 07:09:11,686 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 335 transitions, 6810 flow [2023-08-30 07:09:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:11,687 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] [2023-08-30 07:09:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 07:09:11,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:11,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1279838736, now seen corresponding path program 7 times [2023-08-30 07:09:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350187966] [2023-08-30 07:09:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:11,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350187966] [2023-08-30 07:09:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350187966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:11,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825014106] [2023-08-30 07:09:11,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:11,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 07:09:11,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 335 transitions, 6810 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:11,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:11,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 07:09:11,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:13,169 INFO L130 PetriNetUnfolder]: 4791/7619 cut-off events. [2023-08-30 07:09:13,169 INFO L131 PetriNetUnfolder]: For 137632/137670 co-relation queries the response was YES. [2023-08-30 07:09:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59828 conditions, 7619 events. 4791/7619 cut-off events. For 137632/137670 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46412 event pairs, 1007 based on Foata normal form. 40/7654 useless extension candidates. Maximal degree in co-relation 59782. Up to 6682 conditions per place. [2023-08-30 07:09:13,245 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 207 selfloop transitions, 21 changer transitions 18/379 dead transitions. [2023-08-30 07:09:13,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 379 transitions, 7739 flow [2023-08-30 07:09:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:09:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:09:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-08-30 07:09:13,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48097560975609754 [2023-08-30 07:09:13,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-08-30 07:09:13,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-08-30 07:09:13,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:13,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-08-30 07:09:13,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:13,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:13,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:13,252 INFO L175 Difference]: Start difference. First operand has 124 places, 335 transitions, 6810 flow. Second operand 5 states and 493 transitions. [2023-08-30 07:09:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 379 transitions, 7739 flow [2023-08-30 07:09:13,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 379 transitions, 7555 flow, removed 44 selfloop flow, removed 2 redundant places. [2023-08-30 07:09:13,622 INFO L231 Difference]: Finished difference. Result has 128 places, 336 transitions, 6725 flow [2023-08-30 07:09:13,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6725, PETRI_PLACES=128, PETRI_TRANSITIONS=336} [2023-08-30 07:09:13,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2023-08-30 07:09:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 336 transitions, 6725 flow [2023-08-30 07:09:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:13,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:13,624 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] [2023-08-30 07:09:13,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 07:09:13,624 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:13,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2093451750, now seen corresponding path program 8 times [2023-08-30 07:09:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:13,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071154748] [2023-08-30 07:09:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:13,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071154748] [2023-08-30 07:09:13,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071154748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:13,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:13,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:09:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954765103] [2023-08-30 07:09:13,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:09:13,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:09:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:09:13,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 07:09:13,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 336 transitions, 6725 flow. Second operand has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:13,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:13,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 07:09:13,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:15,277 INFO L130 PetriNetUnfolder]: 4928/7806 cut-off events. [2023-08-30 07:09:15,277 INFO L131 PetriNetUnfolder]: For 138753/138773 co-relation queries the response was YES. [2023-08-30 07:09:15,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61004 conditions, 7806 events. 4928/7806 cut-off events. For 138753/138773 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47387 event pairs, 1033 based on Foata normal form. 10/7815 useless extension candidates. Maximal degree in co-relation 60957. Up to 6657 conditions per place. [2023-08-30 07:09:15,367 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 217 selfloop transitions, 24 changer transitions 13/383 dead transitions. [2023-08-30 07:09:15,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 383 transitions, 7668 flow [2023-08-30 07:09:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2023-08-30 07:09:15,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772357723577236 [2023-08-30 07:09:15,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2023-08-30 07:09:15,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2023-08-30 07:09:15,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:15,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2023-08-30 07:09:15,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:15,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:15,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:15,375 INFO L175 Difference]: Start difference. First operand has 128 places, 336 transitions, 6725 flow. Second operand 6 states and 587 transitions. [2023-08-30 07:09:15,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 383 transitions, 7668 flow [2023-08-30 07:09:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 383 transitions, 7535 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-08-30 07:09:15,749 INFO L231 Difference]: Finished difference. Result has 128 places, 330 transitions, 6531 flow [2023-08-30 07:09:15,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6531, PETRI_PLACES=128, PETRI_TRANSITIONS=330} [2023-08-30 07:09:15,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2023-08-30 07:09:15,750 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 330 transitions, 6531 flow [2023-08-30 07:09:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:15,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:15,750 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] [2023-08-30 07:09:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 07:09:15,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:15,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -35328729, now seen corresponding path program 1 times [2023-08-30 07:09:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307662757] [2023-08-30 07:09:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:16,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307662757] [2023-08-30 07:09:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307662757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846770113] [2023-08-30 07:09:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:16,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:16,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:16,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 07:09:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:09:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:16,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846770113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:16,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:09:16,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 07:09:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651154106] [2023-08-30 07:09:16,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:16,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:09:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:09:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:09:16,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 07:09:16,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 330 transitions, 6531 flow. Second operand has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:16,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:16,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 07:09:16,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:18,528 INFO L130 PetriNetUnfolder]: 6286/10787 cut-off events. [2023-08-30 07:09:18,528 INFO L131 PetriNetUnfolder]: For 198813/200307 co-relation queries the response was YES. [2023-08-30 07:09:18,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84121 conditions, 10787 events. 6286/10787 cut-off events. For 198813/200307 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 80650 event pairs, 313 based on Foata normal form. 694/11427 useless extension candidates. Maximal degree in co-relation 84075. Up to 5148 conditions per place. [2023-08-30 07:09:18,643 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 267 selfloop transitions, 217 changer transitions 6/636 dead transitions. [2023-08-30 07:09:18,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 636 transitions, 12866 flow [2023-08-30 07:09:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:09:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:09:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 871 transitions. [2023-08-30 07:09:18,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47208672086720865 [2023-08-30 07:09:18,647 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 871 transitions. [2023-08-30 07:09:18,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 871 transitions. [2023-08-30 07:09:18,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:18,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 871 transitions. [2023-08-30 07:09:18,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.77777777777777) internal successors, (871), 9 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:18,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:18,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:18,651 INFO L175 Difference]: Start difference. First operand has 128 places, 330 transitions, 6531 flow. Second operand 9 states and 871 transitions. [2023-08-30 07:09:18,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 636 transitions, 12866 flow [2023-08-30 07:09:19,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 636 transitions, 12448 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-30 07:09:19,278 INFO L231 Difference]: Finished difference. Result has 130 places, 516 transitions, 11049 flow [2023-08-30 07:09:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11049, PETRI_PLACES=130, PETRI_TRANSITIONS=516} [2023-08-30 07:09:19,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2023-08-30 07:09:19,279 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 516 transitions, 11049 flow [2023-08-30 07:09:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:19,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:19,280 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] [2023-08-30 07:09:19,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:19,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:19,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:19,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 4874269, now seen corresponding path program 2 times [2023-08-30 07:09:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:19,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302137089] [2023-08-30 07:09:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:19,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:19,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302137089] [2023-08-30 07:09:19,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302137089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016890564] [2023-08-30 07:09:19,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:09:19,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:19,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:19,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:19,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 07:09:19,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:09:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:09:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:09:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:20,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016890564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:20,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:09:20,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 07:09:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908851377] [2023-08-30 07:09:20,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:09:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:09:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:09:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:09:20,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 516 transitions, 11049 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:20,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:20,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:09:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:23,032 INFO L130 PetriNetUnfolder]: 7189/12287 cut-off events. [2023-08-30 07:09:23,032 INFO L131 PetriNetUnfolder]: For 238309/239877 co-relation queries the response was YES. [2023-08-30 07:09:23,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100013 conditions, 12287 events. 7189/12287 cut-off events. For 238309/239877 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 93369 event pairs, 465 based on Foata normal form. 836/13070 useless extension candidates. Maximal degree in co-relation 99966. Up to 8315 conditions per place. [2023-08-30 07:09:23,172 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 532 selfloop transitions, 219 changer transitions 6/774 dead transitions. [2023-08-30 07:09:23,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 774 transitions, 17333 flow [2023-08-30 07:09:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:09:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:09:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1000 transitions. [2023-08-30 07:09:23,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2023-08-30 07:09:23,184 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1000 transitions. [2023-08-30 07:09:23,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1000 transitions. [2023-08-30 07:09:23,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:23,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1000 transitions. [2023-08-30 07:09:23,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 90.9090909090909) internal successors, (1000), 11 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:23,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:23,192 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:23,192 INFO L175 Difference]: Start difference. First operand has 130 places, 516 transitions, 11049 flow. Second operand 11 states and 1000 transitions. [2023-08-30 07:09:23,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 774 transitions, 17333 flow [2023-08-30 07:09:24,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 774 transitions, 16682 flow, removed 316 selfloop flow, removed 1 redundant places. [2023-08-30 07:09:24,213 INFO L231 Difference]: Finished difference. Result has 144 places, 619 transitions, 13495 flow [2023-08-30 07:09:24,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13495, PETRI_PLACES=144, PETRI_TRANSITIONS=619} [2023-08-30 07:09:24,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2023-08-30 07:09:24,214 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 619 transitions, 13495 flow [2023-08-30 07:09:24,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:24,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:24,215 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] [2023-08-30 07:09:24,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 07:09:24,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:24,416 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:24,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash 824336521, now seen corresponding path program 1 times [2023-08-30 07:09:24,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:24,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985159722] [2023-08-30 07:09:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:24,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:24,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:24,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985159722] [2023-08-30 07:09:24,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985159722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:24,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561793831] [2023-08-30 07:09:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:24,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:24,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:24,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:24,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 07:09:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:09:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:25,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:25,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561793831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:25,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:09:25,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-30 07:09:25,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371560154] [2023-08-30 07:09:25,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:25,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:09:25,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:09:25,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:09:25,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:09:25,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 619 transitions, 13495 flow. Second operand has 20 states, 20 states have (on average 84.5) internal successors, (1690), 20 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:25,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:25,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:09:25,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:36,256 INFO L130 PetriNetUnfolder]: 19989/32682 cut-off events. [2023-08-30 07:09:36,256 INFO L131 PetriNetUnfolder]: For 672685/672685 co-relation queries the response was YES. [2023-08-30 07:09:36,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264828 conditions, 32682 events. 19989/32682 cut-off events. For 672685/672685 co-relation queries the response was YES. Maximal size of possible extension queue 1630. Compared 260885 event pairs, 819 based on Foata normal form. 1994/34676 useless extension candidates. Maximal degree in co-relation 264775. Up to 7667 conditions per place. [2023-08-30 07:09:36,606 INFO L137 encePairwiseOnDemand]: 194/205 looper letters, 972 selfloop transitions, 1746 changer transitions 1/2719 dead transitions. [2023-08-30 07:09:36,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 2719 transitions, 57245 flow [2023-08-30 07:09:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 07:09:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 07:09:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5219 transitions. [2023-08-30 07:09:36,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454616724738676 [2023-08-30 07:09:36,616 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5219 transitions. [2023-08-30 07:09:36,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5219 transitions. [2023-08-30 07:09:36,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:36,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5219 transitions. [2023-08-30 07:09:36,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 93.19642857142857) internal successors, (5219), 56 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:36,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 205.0) internal successors, (11685), 57 states have internal predecessors, (11685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:36,645 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 205.0) internal successors, (11685), 57 states have internal predecessors, (11685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:36,645 INFO L175 Difference]: Start difference. First operand has 144 places, 619 transitions, 13495 flow. Second operand 56 states and 5219 transitions. [2023-08-30 07:09:36,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 2719 transitions, 57245 flow [2023-08-30 07:09:39,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 2719 transitions, 56846 flow, removed 187 selfloop flow, removed 2 redundant places. [2023-08-30 07:09:39,501 INFO L231 Difference]: Finished difference. Result has 238 places, 2057 transitions, 49945 flow [2023-08-30 07:09:39,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=13188, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=49945, PETRI_PLACES=238, PETRI_TRANSITIONS=2057} [2023-08-30 07:09:39,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2023-08-30 07:09:39,502 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 2057 transitions, 49945 flow [2023-08-30 07:09:39,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 84.5) internal successors, (1690), 20 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:39,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:39,503 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] [2023-08-30 07:09:39,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:39,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 07:09:39,708 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:09:39,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1181150605, now seen corresponding path program 2 times [2023-08-30 07:09:39,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:09:39,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163508401] [2023-08-30 07:09:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:09:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:09:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163508401] [2023-08-30 07:09:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163508401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:09:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419064444] [2023-08-30 07:09:39,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:09:39,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:09:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:09:39,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:09:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 07:09:40,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:09:40,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:09:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:09:40,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:40,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:09:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419064444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:40,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:09:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-30 07:09:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936993136] [2023-08-30 07:09:40,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 07:09:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:09:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 07:09:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-30 07:09:40,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:09:40,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 2057 transitions, 49945 flow. Second operand has 17 states, 17 states have (on average 84.47058823529412) internal successors, (1436), 17 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:40,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:40,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:09:40,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:00,907 INFO L130 PetriNetUnfolder]: 23910/39569 cut-off events. [2023-08-30 07:10:00,908 INFO L131 PetriNetUnfolder]: For 1189955/1189955 co-relation queries the response was YES. [2023-08-30 07:10:01,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389915 conditions, 39569 events. 23910/39569 cut-off events. For 1189955/1189955 co-relation queries the response was YES. Maximal size of possible extension queue 2071. Compared 329449 event pairs, 594 based on Foata normal form. 324/39893 useless extension candidates. Maximal degree in co-relation 389821. Up to 9113 conditions per place. [2023-08-30 07:10:01,785 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 1413 selfloop transitions, 2365 changer transitions 8/3786 dead transitions. [2023-08-30 07:10:01,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 3786 transitions, 94541 flow [2023-08-30 07:10:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 07:10:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 07:10:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4872 transitions. [2023-08-30 07:10:01,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841233317993556 [2023-08-30 07:10:01,792 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4872 transitions. [2023-08-30 07:10:01,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4872 transitions. [2023-08-30 07:10:01,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:01,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4872 transitions. [2023-08-30 07:10:01,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 91.9245283018868) internal successors, (4872), 53 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:01,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 205.0) internal successors, (11070), 54 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:01,813 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 205.0) internal successors, (11070), 54 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:01,813 INFO L175 Difference]: Start difference. First operand has 238 places, 2057 transitions, 49945 flow. Second operand 53 states and 4872 transitions. [2023-08-30 07:10:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 3786 transitions, 94541 flow [2023-08-30 07:10:26,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 3786 transitions, 86521 flow, removed 3991 selfloop flow, removed 1 redundant places. [2023-08-30 07:10:26,187 INFO L231 Difference]: Finished difference. Result has 330 places, 3189 transitions, 79820 flow [2023-08-30 07:10:26,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=44827, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=79820, PETRI_PLACES=330, PETRI_TRANSITIONS=3189} [2023-08-30 07:10:26,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2023-08-30 07:10:26,190 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 3189 transitions, 79820 flow [2023-08-30 07:10:26,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.47058823529412) internal successors, (1436), 17 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:26,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:26,191 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] [2023-08-30 07:10:26,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:10:26,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:26,397 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:10:26,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 293003447, now seen corresponding path program 3 times [2023-08-30 07:10:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:26,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262034625] [2023-08-30 07:10:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262034625] [2023-08-30 07:10:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262034625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806818977] [2023-08-30 07:10:26,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:10:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:26,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:10:26,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 07:10:26,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:10:26,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:10:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:26,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:27,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806818977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:27,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:27,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 18 [2023-08-30 07:10:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709976404] [2023-08-30 07:10:27,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:27,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 07:10:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:27,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 07:10:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-08-30 07:10:27,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:10:27,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 3189 transitions, 79820 flow. Second operand has 19 states, 19 states have (on average 84.42105263157895) internal successors, (1604), 19 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:27,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:27,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:10:27,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:14,851 INFO L130 PetriNetUnfolder]: 34659/57843 cut-off events. [2023-08-30 07:11:14,851 INFO L131 PetriNetUnfolder]: For 2043286/2043286 co-relation queries the response was YES. [2023-08-30 07:11:16,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595317 conditions, 57843 events. 34659/57843 cut-off events. For 2043286/2043286 co-relation queries the response was YES. Maximal size of possible extension queue 2952. Compared 512537 event pairs, 594 based on Foata normal form. 1062/58905 useless extension candidates. Maximal degree in co-relation 595183. Up to 12533 conditions per place. [2023-08-30 07:11:16,899 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 1807 selfloop transitions, 4019 changer transitions 9/5835 dead transitions. [2023-08-30 07:11:16,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 5835 transitions, 153261 flow [2023-08-30 07:11:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 07:11:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 07:11:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5655 transitions. [2023-08-30 07:11:16,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45221911235505796 [2023-08-30 07:11:16,907 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5655 transitions. [2023-08-30 07:11:16,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5655 transitions. [2023-08-30 07:11:16,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:16,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5655 transitions. [2023-08-30 07:11:16,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 92.70491803278688) internal successors, (5655), 61 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 205.0) internal successors, (12710), 62 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,927 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 205.0) internal successors, (12710), 62 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,928 INFO L175 Difference]: Start difference. First operand has 330 places, 3189 transitions, 79820 flow. Second operand 61 states and 5655 transitions. [2023-08-30 07:11:16,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 5835 transitions, 153261 flow [2023-08-30 07:12:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 5835 transitions, 149205 flow, removed 1579 selfloop flow, removed 5 redundant places. [2023-08-30 07:12:29,690 INFO L231 Difference]: Finished difference. Result has 432 places, 4980 transitions, 138402 flow [2023-08-30 07:12:29,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=76675, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=138402, PETRI_PLACES=432, PETRI_TRANSITIONS=4980} [2023-08-30 07:12:29,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2023-08-30 07:12:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 4980 transitions, 138402 flow [2023-08-30 07:12:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.42105263157895) internal successors, (1604), 19 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:29,694 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] [2023-08-30 07:12:29,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:29,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:29,899 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 07:12:29,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -191346289, now seen corresponding path program 4 times [2023-08-30 07:12:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:29,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035766529] [2023-08-30 07:12:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:29,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:30,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035766529] [2023-08-30 07:12:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035766529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308244119] [2023-08-30 07:12:30,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:12:30,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:30,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:30,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:30,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 07:12:30,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:12:30,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:12:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:30,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:30,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308244119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:30,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:30,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 17 [2023-08-30 07:12:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767393787] [2023-08-30 07:12:30,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 07:12:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 07:12:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-30 07:12:30,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 07:12:30,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 4980 transitions, 138402 flow. Second operand has 18 states, 18 states have (on average 84.38888888888889) internal successors, (1519), 18 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:30,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 07:12:30,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:15,423 INFO L130 PetriNetUnfolder]: 73425/122989 cut-off events. [2023-08-30 07:15:15,424 INFO L131 PetriNetUnfolder]: For 5554297/5554297 co-relation queries the response was YES. [2023-08-30 07:15:20,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441029 conditions, 122989 events. 73425/122989 cut-off events. For 5554297/5554297 co-relation queries the response was YES. Maximal size of possible extension queue 6535. Compared 1208841 event pairs, 1405 based on Foata normal form. 3036/126025 useless extension candidates. Maximal degree in co-relation 1440851. Up to 25745 conditions per place. [2023-08-30 07:15:21,817 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 3123 selfloop transitions, 10147 changer transitions 50/13320 dead transitions. [2023-08-30 07:15:21,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 13320 transitions, 387704 flow [2023-08-30 07:15:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-08-30 07:15:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-08-30 07:15:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 11484 transitions. [2023-08-30 07:15:21,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45544318857822724 [2023-08-30 07:15:21,830 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 11484 transitions. [2023-08-30 07:15:21,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 11484 transitions. [2023-08-30 07:15:21,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:21,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 11484 transitions. [2023-08-30 07:15:21,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 93.36585365853658) internal successors, (11484), 123 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:21,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 205.0) internal successors, (25420), 124 states have internal predecessors, (25420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:21,874 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 205.0) internal successors, (25420), 124 states have internal predecessors, (25420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:21,874 INFO L175 Difference]: Start difference. First operand has 432 places, 4980 transitions, 138402 flow. Second operand 123 states and 11484 transitions. [2023-08-30 07:15:21,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 13320 transitions, 387704 flow Killed by 15