./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --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 [2023-08-31 01:22:15,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:22:15,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:22:15,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:22:15,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:22:15,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:22:15,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:22:15,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:22:15,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:22:15,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:22:15,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:22:15,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:22:15,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:22:15,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:22:15,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:22:15,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:22:15,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:22:15,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:22:15,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:22:15,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:22:15,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:22:15,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:22:15,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:22:15,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:22:15,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:22:15,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:22:15,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:22:15,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:22:15,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:22:15,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:22:15,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:22:15,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:22:15,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:22:15,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:22:15,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:22:15,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:22:15,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:22:15,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:22:15,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:22:15,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:22:15,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:22:15,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:22:15,598 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:22:15,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:22:15,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:22:15,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:22:15,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:22:15,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:22:15,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:22:15,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:22:15,601 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:22:15,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:22:15,602 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:22:15,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:22:15,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:22:15,603 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:22:15,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:22:15,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:22:15,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:22:15,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:22:15,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:22:15,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:22:15,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:22:15,606 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:22:15,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:22:15,606 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:22:15,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:22:15,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:22:15,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:22:15,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:22:15,855 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:22:15,856 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:22:15,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-31 01:22:16,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:22:17,033 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:22:17,033 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-31 01:22:17,038 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2593184/f1962c6e1ddf4860bb7a480bd3acf388/FLAGd0d216f2d [2023-08-31 01:22:17,047 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2593184/f1962c6e1ddf4860bb7a480bd3acf388 [2023-08-31 01:22:17,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:22:17,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:22:17,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:22:17,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:22:17,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:22:17,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af10393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17, skipping insertion in model container [2023-08-31 01:22:17,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:22:17,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:22:17,270 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/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-31 01:22:17,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:22:17,294 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:22:17,331 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/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-31 01:22:17,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:22:17,349 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:22:17,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17 WrapperNode [2023-08-31 01:22:17,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:22:17,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:22:17,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:22:17,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:22:17,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,398 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-31 01:22:17,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:22:17,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:22:17,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:22:17,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:22:17,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:22:17,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:22:17,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:22:17,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:22:17,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (1/1) ... [2023-08-31 01:22:17,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:22:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:17,501 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) [2023-08-31 01:22:17,515 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 [2023-08-31 01:22:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:22:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:22:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:22:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:22:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:22:17,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:22:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:22:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:22:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:22:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:22:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:22:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:22:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:22:17,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:22:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:22:17,549 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:22:17,680 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:22:17,682 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:22:18,353 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:22:18,368 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:22:18,368 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 01:22:18,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:22:18 BoogieIcfgContainer [2023-08-31 01:22:18,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:22:18,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:22:18,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:22:18,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:22:18,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:22:17" (1/3) ... [2023-08-31 01:22:18,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c70212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:22:18, skipping insertion in model container [2023-08-31 01:22:18,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:22:17" (2/3) ... [2023-08-31 01:22:18,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c70212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:22:18, skipping insertion in model container [2023-08-31 01:22:18,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:22:18" (3/3) ... [2023-08-31 01:22:18,378 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-08-31 01:22:18,383 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:22:18,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:22:18,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:22:18,390 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:22:18,541 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:22:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 717 transitions, 1458 flow [2023-08-31 01:22:18,814 INFO L130 PetriNetUnfolder]: 73/714 cut-off events. [2023-08-31 01:22:18,814 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:22:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 714 events. 73/714 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2388 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-31 01:22:18,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 717 transitions, 1458 flow [2023-08-31 01:22:18,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 704 transitions, 1426 flow [2023-08-31 01:22:18,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:22:18,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-31 01:22:18,865 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-31 01:22:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 704 transitions, 1426 flow [2023-08-31 01:22:19,000 INFO L130 PetriNetUnfolder]: 73/704 cut-off events. [2023-08-31 01:22:19,000 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:22:19,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 704 events. 73/704 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-31 01:22:19,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-08-31 01:22:41,179 INFO L134 LiptonReduction]: Checked pairs total: 150057 [2023-08-31 01:22:41,180 INFO L136 LiptonReduction]: Total number of compositions: 891 [2023-08-31 01:22:41,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:22:41,193 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@41be4d99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:22:41,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:22:41,204 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-08-31 01:22:41,207 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:22:41,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:41,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:41,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:41,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1427696023, now seen corresponding path program 1 times [2023-08-31 01:22:41,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:41,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033742919] [2023-08-31 01:22:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:41,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:22:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033742919] [2023-08-31 01:22:41,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033742919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:41,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:41,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:22:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631595165] [2023-08-31 01:22:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:41,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:22:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:22:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:22:41,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 661 out of 1608 [2023-08-31 01:22:41,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:41,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:41,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 661 of 1608 [2023-08-31 01:22:41,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:42,257 INFO L130 PetriNetUnfolder]: 2608/3503 cut-off events. [2023-08-31 01:22:42,258 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-31 01:22:42,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7267 conditions, 3503 events. 2608/3503 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12504 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6748. Up to 3501 conditions per place. [2023-08-31 01:22:42,269 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-31 01:22:42,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 218 flow [2023-08-31 01:22:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:22:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:22:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2037 transitions. [2023-08-31 01:22:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-08-31 01:22:42,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2037 transitions. [2023-08-31 01:22:42,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2037 transitions. [2023-08-31 01:22:42,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:42,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2037 transitions. [2023-08-31 01:22:42,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 679.0) internal successors, (2037), 3 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:42,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:42,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:42,313 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2037 transitions. [2023-08-31 01:22:42,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 218 flow [2023-08-31 01:22:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:22:42,321 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 132 flow [2023-08-31 01:22:42,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2023-08-31 01:22:42,326 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-31 01:22:42,326 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 132 flow [2023-08-31 01:22:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:42,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:42,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:22:42,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:42,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2065041558, now seen corresponding path program 1 times [2023-08-31 01:22:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:42,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345949926] [2023-08-31 01:22:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:22:42,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:42,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345949926] [2023-08-31 01:22:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345949926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424963691] [2023-08-31 01:22:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:42,519 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) [2023-08-31 01:22:42,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:22:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:22:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:22:42,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:22:42,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424963691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:42,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:42,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-31 01:22:42,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158879178] [2023-08-31 01:22:42,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:42,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:22:42,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:22:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:22:42,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-31 01:22:42,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:42,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:42,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-31 01:22:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:43,334 INFO L130 PetriNetUnfolder]: 2608/3512 cut-off events. [2023-08-31 01:22:43,335 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 01:22:43,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 3512 events. 2608/3512 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12508 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7112. Up to 3501 conditions per place. [2023-08-31 01:22:43,348 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 44 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2023-08-31 01:22:43,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 286 flow [2023-08-31 01:22:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:22:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:22:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3998 transitions. [2023-08-31 01:22:43,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2023-08-31 01:22:43,355 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3998 transitions. [2023-08-31 01:22:43,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3998 transitions. [2023-08-31 01:22:43,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:43,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3998 transitions. [2023-08-31 01:22:43,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 666.3333333333334) internal successors, (3998), 6 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:43,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:43,379 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:43,380 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 132 flow. Second operand 6 states and 3998 transitions. [2023-08-31 01:22:43,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 286 flow [2023-08-31 01:22:43,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:22:43,383 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 222 flow [2023-08-31 01:22:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-31 01:22:43,383 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-31 01:22:43,384 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 222 flow [2023-08-31 01:22:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:43,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:43,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:43,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:22:43,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:43,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:43,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:43,597 INFO L85 PathProgramCache]: Analyzing trace with hash 773664469, now seen corresponding path program 2 times [2023-08-31 01:22:43,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:43,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383601384] [2023-08-31 01:22:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:22:43,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383601384] [2023-08-31 01:22:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383601384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358352535] [2023-08-31 01:22:43,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:22:43,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:43,756 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) [2023-08-31 01:22:43,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:22:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:22:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:22:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:22:45,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:22:45,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358352535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:45,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:22:45,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 01:22:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830747739] [2023-08-31 01:22:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:45,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:45,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:22:45,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-31 01:22:45,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:45,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:45,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-31 01:22:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:46,182 INFO L130 PetriNetUnfolder]: 2934/4017 cut-off events. [2023-08-31 01:22:46,182 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-31 01:22:46,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8213 conditions, 4017 events. 2934/4017 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15676 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8125. Up to 3431 conditions per place. [2023-08-31 01:22:46,196 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 96 selfloop transitions, 2 changer transitions 7/105 dead transitions. [2023-08-31 01:22:46,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 536 flow [2023-08-31 01:22:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3289 transitions. [2023-08-31 01:22:46,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090796019900497 [2023-08-31 01:22:46,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3289 transitions. [2023-08-31 01:22:46,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3289 transitions. [2023-08-31 01:22:46,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:46,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3289 transitions. [2023-08-31 01:22:46,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 657.8) internal successors, (3289), 5 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:46,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:46,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:46,218 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 222 flow. Second operand 5 states and 3289 transitions. [2023-08-31 01:22:46,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 536 flow [2023-08-31 01:22:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 512 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 01:22:46,223 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 213 flow [2023-08-31 01:22:46,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-31 01:22:46,224 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-31 01:22:46,224 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 213 flow [2023-08-31 01:22:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:46,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:46,228 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:46,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:46,432 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,SelfDestructingSolverStorable2 [2023-08-31 01:22:46,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:46,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1680310845, now seen corresponding path program 3 times [2023-08-31 01:22:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464046875] [2023-08-31 01:22:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:22:46,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464046875] [2023-08-31 01:22:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464046875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736093759] [2023-08-31 01:22:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:22:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:46,599 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) [2023-08-31 01:22:46,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:22:46,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:22:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:22:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:22:47,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:22:47,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736093759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:47,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:22:47,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-08-31 01:22:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162507604] [2023-08-31 01:22:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:22:47,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-31 01:22:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:47,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-31 01:22:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:48,775 INFO L130 PetriNetUnfolder]: 3124/4357 cut-off events. [2023-08-31 01:22:48,775 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2023-08-31 01:22:48,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 4357 events. 3124/4357 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18094 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9371. Up to 3869 conditions per place. [2023-08-31 01:22:48,787 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 100 selfloop transitions, 3 changer transitions 7/110 dead transitions. [2023-08-31 01:22:48,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 555 flow [2023-08-31 01:22:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3293 transitions. [2023-08-31 01:22:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095771144278607 [2023-08-31 01:22:48,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3293 transitions. [2023-08-31 01:22:48,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3293 transitions. [2023-08-31 01:22:48,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:48,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3293 transitions. [2023-08-31 01:22:48,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.6) internal successors, (3293), 5 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:48,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:48,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:48,807 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 213 flow. Second operand 5 states and 3293 transitions. [2023-08-31 01:22:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 555 flow [2023-08-31 01:22:48,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 546 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 01:22:48,810 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 230 flow [2023-08-31 01:22:48,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-31 01:22:48,810 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-08-31 01:22:48,810 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 230 flow [2023-08-31 01:22:48,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:48,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:48,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:48,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:49,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:49,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:49,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257897, now seen corresponding path program 4 times [2023-08-31 01:22:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:49,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763815643] [2023-08-31 01:22:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:22:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763815643] [2023-08-31 01:22:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763815643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073871349] [2023-08-31 01:22:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:22:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:49,179 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) [2023-08-31 01:22:49,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:22:49,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:22:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:22:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:22:49,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:22:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073871349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:49,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:49,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 01:22:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695782891] [2023-08-31 01:22:49,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:49,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:22:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:22:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:22:49,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-31 01:22:49,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:49,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:49,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-31 01:22:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:50,197 INFO L130 PetriNetUnfolder]: 3123/4352 cut-off events. [2023-08-31 01:22:50,198 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2023-08-31 01:22:50,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 4352 events. 3123/4352 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17812 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 9879. Up to 4338 conditions per place. [2023-08-31 01:22:50,211 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 46 selfloop transitions, 18 changer transitions 0/64 dead transitions. [2023-08-31 01:22:50,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 376 flow [2023-08-31 01:22:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:22:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:22:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4650 transitions. [2023-08-31 01:22:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131130063965885 [2023-08-31 01:22:50,220 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4650 transitions. [2023-08-31 01:22:50,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4650 transitions. [2023-08-31 01:22:50,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:50,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4650 transitions. [2023-08-31 01:22:50,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 664.2857142857143) internal successors, (4650), 7 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:50,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:50,237 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:50,237 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 230 flow. Second operand 7 states and 4650 transitions. [2023-08-31 01:22:50,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 376 flow [2023-08-31 01:22:50,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 370 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:22:50,240 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 292 flow [2023-08-31 01:22:50,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-31 01:22:50,241 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-31 01:22:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 292 flow [2023-08-31 01:22:50,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:50,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:50,243 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:50,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:50,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:50,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:50,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -472303414, now seen corresponding path program 5 times [2023-08-31 01:22:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126652379] [2023-08-31 01:22:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:50,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:22:51,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:51,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126652379] [2023-08-31 01:22:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126652379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:51,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:51,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:22:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761160491] [2023-08-31 01:22:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:22:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-08-31 01:22:51,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:51,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:51,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-08-31 01:22:51,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:52,089 INFO L130 PetriNetUnfolder]: 3772/5412 cut-off events. [2023-08-31 01:22:52,089 INFO L131 PetriNetUnfolder]: For 1184/1184 co-relation queries the response was YES. [2023-08-31 01:22:52,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 5412 events. 3772/5412 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25238 event pairs, 2135 based on Foata normal form. 1/4567 useless extension candidates. Maximal degree in co-relation 11782. Up to 4014 conditions per place. [2023-08-31 01:22:52,111 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 121 selfloop transitions, 14 changer transitions 4/139 dead transitions. [2023-08-31 01:22:52,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 751 flow [2023-08-31 01:22:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3297 transitions. [2023-08-31 01:22:52,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41007462686567164 [2023-08-31 01:22:52,119 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3297 transitions. [2023-08-31 01:22:52,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3297 transitions. [2023-08-31 01:22:52,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:52,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3297 transitions. [2023-08-31 01:22:52,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.4) internal successors, (3297), 5 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:52,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:52,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:52,137 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 292 flow. Second operand 5 states and 3297 transitions. [2023-08-31 01:22:52,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 751 flow [2023-08-31 01:22:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 139 transitions, 715 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-31 01:22:52,142 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 372 flow [2023-08-31 01:22:52,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-31 01:22:52,144 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2023-08-31 01:22:52,145 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 372 flow [2023-08-31 01:22:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:52,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:52,146 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:52,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:22:52,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:52,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash 952440716, now seen corresponding path program 6 times [2023-08-31 01:22:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982108297] [2023-08-31 01:22:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:22:52,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982108297] [2023-08-31 01:22:52,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982108297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:52,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:52,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:22:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192272588] [2023-08-31 01:22:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:52,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:52,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:22:52,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-08-31 01:22:52,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:52,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:52,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-08-31 01:22:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:54,273 INFO L130 PetriNetUnfolder]: 7026/9920 cut-off events. [2023-08-31 01:22:54,273 INFO L131 PetriNetUnfolder]: For 6866/6866 co-relation queries the response was YES. [2023-08-31 01:22:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24933 conditions, 9920 events. 7026/9920 cut-off events. For 6866/6866 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 49525 event pairs, 1967 based on Foata normal form. 1/8697 useless extension candidates. Maximal degree in co-relation 24834. Up to 4768 conditions per place. [2023-08-31 01:22:54,308 INFO L137 encePairwiseOnDemand]: 1593/1608 looper letters, 127 selfloop transitions, 43 changer transitions 3/173 dead transitions. [2023-08-31 01:22:54,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 173 transitions, 1042 flow [2023-08-31 01:22:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3318 transitions. [2023-08-31 01:22:54,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126865671641791 [2023-08-31 01:22:54,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3318 transitions. [2023-08-31 01:22:54,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3318 transitions. [2023-08-31 01:22:54,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:54,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3318 transitions. [2023-08-31 01:22:54,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 663.6) internal successors, (3318), 5 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:54,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:54,326 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:54,326 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 372 flow. Second operand 5 states and 3318 transitions. [2023-08-31 01:22:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 173 transitions, 1042 flow [2023-08-31 01:22:54,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 173 transitions, 1031 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 01:22:54,335 INFO L231 Difference]: Finished difference. Result has 73 places, 106 transitions, 711 flow [2023-08-31 01:22:54,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=711, PETRI_PLACES=73, PETRI_TRANSITIONS=106} [2023-08-31 01:22:54,336 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-08-31 01:22:54,336 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 106 transitions, 711 flow [2023-08-31 01:22:54,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:54,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:54,337 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:54,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:22:54,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:54,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1010676078, now seen corresponding path program 7 times [2023-08-31 01:22:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:54,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208987697] [2023-08-31 01:22:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:22:54,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:54,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208987697] [2023-08-31 01:22:54,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208987697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:54,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:54,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:22:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881643885] [2023-08-31 01:22:54,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:22:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-08-31 01:22:54,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 106 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:54,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:54,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-08-31 01:22:54,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:56,463 INFO L130 PetriNetUnfolder]: 7335/10386 cut-off events. [2023-08-31 01:22:56,463 INFO L131 PetriNetUnfolder]: For 16920/16920 co-relation queries the response was YES. [2023-08-31 01:22:56,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31791 conditions, 10386 events. 7335/10386 cut-off events. For 16920/16920 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 52628 event pairs, 3757 based on Foata normal form. 1/9053 useless extension candidates. Maximal degree in co-relation 31689. Up to 8786 conditions per place. [2023-08-31 01:22:56,503 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 167 selfloop transitions, 19 changer transitions 3/189 dead transitions. [2023-08-31 01:22:56,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 189 transitions, 1471 flow [2023-08-31 01:22:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3291 transitions. [2023-08-31 01:22:56,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40932835820895525 [2023-08-31 01:22:56,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3291 transitions. [2023-08-31 01:22:56,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3291 transitions. [2023-08-31 01:22:56,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:56,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3291 transitions. [2023-08-31 01:22:56,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.2) internal successors, (3291), 5 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:56,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:56,520 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:56,520 INFO L175 Difference]: Start difference. First operand has 73 places, 106 transitions, 711 flow. Second operand 5 states and 3291 transitions. [2023-08-31 01:22:56,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 189 transitions, 1471 flow [2023-08-31 01:22:56,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 189 transitions, 1453 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-31 01:22:56,547 INFO L231 Difference]: Finished difference. Result has 80 places, 122 transitions, 904 flow [2023-08-31 01:22:56,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=80, PETRI_TRANSITIONS=122} [2023-08-31 01:22:56,547 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2023-08-31 01:22:56,547 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 122 transitions, 904 flow [2023-08-31 01:22:56,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:56,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:56,548 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:56,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:22:56,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:56,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1354860510, now seen corresponding path program 8 times [2023-08-31 01:22:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867184552] [2023-08-31 01:22:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:22:56,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867184552] [2023-08-31 01:22:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867184552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:56,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:56,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:22:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096514133] [2023-08-31 01:22:56,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:56,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:22:56,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:22:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:22:57,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 634 out of 1608 [2023-08-31 01:22:57,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 122 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 638.4) internal successors, (3192), 5 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:57,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:57,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 634 of 1608 [2023-08-31 01:22:57,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:58,945 INFO L130 PetriNetUnfolder]: 7800/11126 cut-off events. [2023-08-31 01:22:58,949 INFO L131 PetriNetUnfolder]: For 25716/25716 co-relation queries the response was YES. [2023-08-31 01:22:58,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 11126 events. 7800/11126 cut-off events. For 25716/25716 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57874 event pairs, 3450 based on Foata normal form. 1/9741 useless extension candidates. Maximal degree in co-relation 38799. Up to 8455 conditions per place. [2023-08-31 01:22:58,998 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 174 selfloop transitions, 40 changer transitions 4/218 dead transitions. [2023-08-31 01:22:58,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 218 transitions, 1838 flow [2023-08-31 01:22:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3301 transitions. [2023-08-31 01:22:59,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105721393034826 [2023-08-31 01:22:59,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3301 transitions. [2023-08-31 01:22:59,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3301 transitions. [2023-08-31 01:22:59,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:59,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3301 transitions. [2023-08-31 01:22:59,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 660.2) internal successors, (3301), 5 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:59,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:59,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:59,015 INFO L175 Difference]: Start difference. First operand has 80 places, 122 transitions, 904 flow. Second operand 5 states and 3301 transitions. [2023-08-31 01:22:59,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 218 transitions, 1838 flow [2023-08-31 01:22:59,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 218 transitions, 1816 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 01:22:59,071 INFO L231 Difference]: Finished difference. Result has 86 places, 145 transitions, 1288 flow [2023-08-31 01:22:59,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1288, PETRI_PLACES=86, PETRI_TRANSITIONS=145} [2023-08-31 01:22:59,072 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-08-31 01:22:59,072 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 145 transitions, 1288 flow [2023-08-31 01:22:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 638.4) internal successors, (3192), 5 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:59,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:59,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:22:59,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:22:59,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2050180737, now seen corresponding path program 1 times [2023-08-31 01:22:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99375757] [2023-08-31 01:22:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:22:59,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:59,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99375757] [2023-08-31 01:22:59,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99375757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:22:59,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:22:59,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:22:59,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926626798] [2023-08-31 01:22:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:22:59,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:22:59,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:22:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:22:59,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:22:59,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 145 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:59,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:59,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:22:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:01,065 INFO L130 PetriNetUnfolder]: 9909/14036 cut-off events. [2023-08-31 01:23:01,066 INFO L131 PetriNetUnfolder]: For 48456/48456 co-relation queries the response was YES. [2023-08-31 01:23:01,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51285 conditions, 14036 events. 9909/14036 cut-off events. For 48456/48456 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 73262 event pairs, 4598 based on Foata normal form. 206/12412 useless extension candidates. Maximal degree in co-relation 51176. Up to 10987 conditions per place. [2023-08-31 01:23:01,137 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 192 selfloop transitions, 6 changer transitions 0/198 dead transitions. [2023-08-31 01:23:01,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 198 transitions, 2083 flow [2023-08-31 01:23:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:23:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:23:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2072 transitions. [2023-08-31 01:23:01,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295190713101161 [2023-08-31 01:23:01,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2072 transitions. [2023-08-31 01:23:01,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2072 transitions. [2023-08-31 01:23:01,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:01,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2072 transitions. [2023-08-31 01:23:01,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 690.6666666666666) internal successors, (2072), 3 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:01,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:01,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:01,147 INFO L175 Difference]: Start difference. First operand has 86 places, 145 transitions, 1288 flow. Second operand 3 states and 2072 transitions. [2023-08-31 01:23:01,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 198 transitions, 2083 flow [2023-08-31 01:23:01,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 2063 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:01,243 INFO L231 Difference]: Finished difference. Result has 88 places, 142 transitions, 1256 flow [2023-08-31 01:23:01,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1256, PETRI_PLACES=88, PETRI_TRANSITIONS=142} [2023-08-31 01:23:01,244 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2023-08-31 01:23:01,244 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 142 transitions, 1256 flow [2023-08-31 01:23:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:01,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:01,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:23:01,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:01,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 763817431, now seen corresponding path program 1 times [2023-08-31 01:23:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105311659] [2023-08-31 01:23:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105311659] [2023-08-31 01:23:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105311659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:23:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285211902] [2023-08-31 01:23:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:23:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:23:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:23:01,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:23:01,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 142 transitions, 1256 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:01,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:01,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:23:01,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:04,005 INFO L130 PetriNetUnfolder]: 12294/17373 cut-off events. [2023-08-31 01:23:04,005 INFO L131 PetriNetUnfolder]: For 54974/54974 co-relation queries the response was YES. [2023-08-31 01:23:04,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64321 conditions, 17373 events. 12294/17373 cut-off events. For 54974/54974 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 92936 event pairs, 5850 based on Foata normal form. 0/15447 useless extension candidates. Maximal degree in co-relation 64211. Up to 14217 conditions per place. [2023-08-31 01:23:04,137 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 179 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2023-08-31 01:23:04,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 188 transitions, 1949 flow [2023-08-31 01:23:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:23:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:23:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2023-08-31 01:23:04,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-08-31 01:23:04,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2023-08-31 01:23:04,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2023-08-31 01:23:04,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:04,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2023-08-31 01:23:04,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:04,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:04,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:04,162 INFO L175 Difference]: Start difference. First operand has 88 places, 142 transitions, 1256 flow. Second operand 3 states and 2076 transitions. [2023-08-31 01:23:04,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 188 transitions, 1949 flow [2023-08-31 01:23:04,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 188 transitions, 1940 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:04,282 INFO L231 Difference]: Finished difference. Result has 90 places, 141 transitions, 1275 flow [2023-08-31 01:23:04,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1275, PETRI_PLACES=90, PETRI_TRANSITIONS=141} [2023-08-31 01:23:04,283 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2023-08-31 01:23:04,283 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 141 transitions, 1275 flow [2023-08-31 01:23:04,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:04,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:04,284 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:23:04,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:04,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash 937813535, now seen corresponding path program 1 times [2023-08-31 01:23:04,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:04,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385329128] [2023-08-31 01:23:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:04,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:04,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:04,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385329128] [2023-08-31 01:23:04,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385329128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:04,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:04,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:23:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724538039] [2023-08-31 01:23:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:23:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:23:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:23:04,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:23:04,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 141 transitions, 1275 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:04,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:04,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:23:04,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:07,919 INFO L130 PetriNetUnfolder]: 17332/24411 cut-off events. [2023-08-31 01:23:07,919 INFO L131 PetriNetUnfolder]: For 81239/81239 co-relation queries the response was YES. [2023-08-31 01:23:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93256 conditions, 24411 events. 17332/24411 cut-off events. For 81239/81239 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 133043 event pairs, 8161 based on Foata normal form. 412/21791 useless extension candidates. Maximal degree in co-relation 93145. Up to 16188 conditions per place. [2023-08-31 01:23:08,066 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 182 selfloop transitions, 8 changer transitions 0/190 dead transitions. [2023-08-31 01:23:08,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 190 transitions, 2024 flow [2023-08-31 01:23:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:23:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:23:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2074 transitions. [2023-08-31 01:23:08,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-08-31 01:23:08,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2074 transitions. [2023-08-31 01:23:08,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2074 transitions. [2023-08-31 01:23:08,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:08,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2074 transitions. [2023-08-31 01:23:08,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 691.3333333333334) internal successors, (2074), 3 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:08,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:08,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:08,086 INFO L175 Difference]: Start difference. First operand has 90 places, 141 transitions, 1275 flow. Second operand 3 states and 2074 transitions. [2023-08-31 01:23:08,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 190 transitions, 2024 flow [2023-08-31 01:23:08,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 190 transitions, 1995 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:08,247 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1237 flow [2023-08-31 01:23:08,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1237, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2023-08-31 01:23:08,248 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-31 01:23:08,248 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1237 flow [2023-08-31 01:23:08,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:08,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:08,249 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:08,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:23:08,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:08,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 146834425, now seen corresponding path program 1 times [2023-08-31 01:23:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764409931] [2023-08-31 01:23:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:08,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764409931] [2023-08-31 01:23:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764409931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:23:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119055922] [2023-08-31 01:23:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:08,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:08,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:23:08,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1237 flow. Second operand has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:08,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:08,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:23:08,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:12,427 INFO L130 PetriNetUnfolder]: 17806/25153 cut-off events. [2023-08-31 01:23:12,427 INFO L131 PetriNetUnfolder]: For 79892/79892 co-relation queries the response was YES. [2023-08-31 01:23:12,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95789 conditions, 25153 events. 17806/25153 cut-off events. For 79892/79892 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 142677 event pairs, 4930 based on Foata normal form. 4/21961 useless extension candidates. Maximal degree in co-relation 95677. Up to 22762 conditions per place. [2023-08-31 01:23:12,566 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 166 selfloop transitions, 11 changer transitions 29/206 dead transitions. [2023-08-31 01:23:12,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 206 transitions, 2100 flow [2023-08-31 01:23:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2735 transitions. [2023-08-31 01:23:12,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252176616915423 [2023-08-31 01:23:12,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2735 transitions. [2023-08-31 01:23:12,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2735 transitions. [2023-08-31 01:23:12,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:12,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2735 transitions. [2023-08-31 01:23:12,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.75) internal successors, (2735), 4 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:12,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:12,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:12,578 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1237 flow. Second operand 4 states and 2735 transitions. [2023-08-31 01:23:12,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 206 transitions, 2100 flow [2023-08-31 01:23:12,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 206 transitions, 2084 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:12,695 INFO L231 Difference]: Finished difference. Result has 97 places, 143 transitions, 1338 flow [2023-08-31 01:23:12,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1338, PETRI_PLACES=97, PETRI_TRANSITIONS=143} [2023-08-31 01:23:12,696 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2023-08-31 01:23:12,696 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 143 transitions, 1338 flow [2023-08-31 01:23:12,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:12,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:12,697 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:12,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:23:12,697 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:12,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1281119567, now seen corresponding path program 2 times [2023-08-31 01:23:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:12,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186761102] [2023-08-31 01:23:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:12,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:12,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186761102] [2023-08-31 01:23:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186761102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:23:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611564030] [2023-08-31 01:23:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:12,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:12,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:12,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:23:12,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 143 transitions, 1338 flow. Second operand has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:12,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:12,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:23:12,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:16,157 INFO L130 PetriNetUnfolder]: 16909/23851 cut-off events. [2023-08-31 01:23:16,158 INFO L131 PetriNetUnfolder]: For 77336/77336 co-relation queries the response was YES. [2023-08-31 01:23:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90507 conditions, 23851 events. 16909/23851 cut-off events. For 77336/77336 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 131000 event pairs, 10297 based on Foata normal form. 5/20840 useless extension candidates. Maximal degree in co-relation 90439. Up to 21826 conditions per place. [2023-08-31 01:23:16,311 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 155 selfloop transitions, 4 changer transitions 37/196 dead transitions. [2023-08-31 01:23:16,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 196 transitions, 1991 flow [2023-08-31 01:23:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2733 transitions. [2023-08-31 01:23:16,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42490671641791045 [2023-08-31 01:23:16,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2733 transitions. [2023-08-31 01:23:16,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2733 transitions. [2023-08-31 01:23:16,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:16,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2733 transitions. [2023-08-31 01:23:16,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.25) internal successors, (2733), 4 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:16,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:16,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:16,323 INFO L175 Difference]: Start difference. First operand has 97 places, 143 transitions, 1338 flow. Second operand 4 states and 2733 transitions. [2023-08-31 01:23:16,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 196 transitions, 1991 flow [2023-08-31 01:23:16,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 196 transitions, 1976 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:23:16,453 INFO L231 Difference]: Finished difference. Result has 98 places, 131 transitions, 1196 flow [2023-08-31 01:23:16,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1196, PETRI_PLACES=98, PETRI_TRANSITIONS=131} [2023-08-31 01:23:16,454 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-08-31 01:23:16,454 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 131 transitions, 1196 flow [2023-08-31 01:23:16,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:16,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:16,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:16,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 01:23:16,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:16,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -244449536, now seen corresponding path program 1 times [2023-08-31 01:23:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:16,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007434598] [2023-08-31 01:23:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007434598] [2023-08-31 01:23:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007434598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422501357] [2023-08-31 01:23:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:16,765 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) [2023-08-31 01:23:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:23:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:23:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:17,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422501357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:17,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2023-08-31 01:23:17,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972838731] [2023-08-31 01:23:17,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:17,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:23:17,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:17,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:23:17,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:23:17,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 638 out of 1608 [2023-08-31 01:23:17,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 131 transitions, 1196 flow. Second operand has 9 states, 9 states have (on average 645.6666666666666) internal successors, (5811), 9 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:17,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:17,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 638 of 1608 [2023-08-31 01:23:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:21,718 INFO L130 PetriNetUnfolder]: 17414/24697 cut-off events. [2023-08-31 01:23:21,719 INFO L131 PetriNetUnfolder]: For 77476/77476 co-relation queries the response was YES. [2023-08-31 01:23:21,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93462 conditions, 24697 events. 17414/24697 cut-off events. For 77476/77476 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 137965 event pairs, 3924 based on Foata normal form. 4/21597 useless extension candidates. Maximal degree in co-relation 93391. Up to 11141 conditions per place. [2023-08-31 01:23:21,849 INFO L137 encePairwiseOnDemand]: 1594/1608 looper letters, 259 selfloop transitions, 62 changer transitions 35/356 dead transitions. [2023-08-31 01:23:21,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 356 transitions, 3292 flow [2023-08-31 01:23:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:23:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:23:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 9176 transitions. [2023-08-31 01:23:21,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076048329779673 [2023-08-31 01:23:21,860 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 9176 transitions. [2023-08-31 01:23:21,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 9176 transitions. [2023-08-31 01:23:21,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:21,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 9176 transitions. [2023-08-31 01:23:21,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 655.4285714285714) internal successors, (9176), 14 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:21,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1608.0) internal successors, (24120), 15 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:21,883 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1608.0) internal successors, (24120), 15 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:21,883 INFO L175 Difference]: Start difference. First operand has 98 places, 131 transitions, 1196 flow. Second operand 14 states and 9176 transitions. [2023-08-31 01:23:21,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 356 transitions, 3292 flow [2023-08-31 01:23:22,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 356 transitions, 3250 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-31 01:23:22,064 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1745 flow [2023-08-31 01:23:22,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1745, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2023-08-31 01:23:22,065 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 66 predicate places. [2023-08-31 01:23:22,065 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1745 flow [2023-08-31 01:23:22,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 645.6666666666666) internal successors, (5811), 9 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:22,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:22,066 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:22,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:23:22,271 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,SelfDestructingSolverStorable14 [2023-08-31 01:23:22,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:22,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 939975353, now seen corresponding path program 1 times [2023-08-31 01:23:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:22,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098886914] [2023-08-31 01:23:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098886914] [2023-08-31 01:23:22,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098886914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329877331] [2023-08-31 01:23:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:22,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:22,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:22,444 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) [2023-08-31 01:23:22,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:23:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:23:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:22,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:22,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329877331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:22,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:22,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:23:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162101120] [2023-08-31 01:23:22,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:23:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:23:22,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:23:22,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:23:22,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1745 flow. Second operand has 6 states, 6 states have (on average 667.6666666666666) internal successors, (4006), 6 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:22,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:22,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:23:22,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:26,378 INFO L130 PetriNetUnfolder]: 17516/24962 cut-off events. [2023-08-31 01:23:26,378 INFO L131 PetriNetUnfolder]: For 100253/100253 co-relation queries the response was YES. [2023-08-31 01:23:26,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98038 conditions, 24962 events. 17516/24962 cut-off events. For 100253/100253 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 141460 event pairs, 3642 based on Foata normal form. 3/21839 useless extension candidates. Maximal degree in co-relation 97966. Up to 20872 conditions per place. [2023-08-31 01:23:26,525 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 149 selfloop transitions, 12 changer transitions 63/224 dead transitions. [2023-08-31 01:23:26,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 224 transitions, 2603 flow [2023-08-31 01:23:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2741 transitions. [2023-08-31 01:23:26,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42615049751243783 [2023-08-31 01:23:26,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2741 transitions. [2023-08-31 01:23:26,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2741 transitions. [2023-08-31 01:23:26,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:26,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2741 transitions. [2023-08-31 01:23:26,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 685.25) internal successors, (2741), 4 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:26,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:26,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:26,536 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1745 flow. Second operand 4 states and 2741 transitions. [2023-08-31 01:23:26,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 224 transitions, 2603 flow [2023-08-31 01:23:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 224 transitions, 2533 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:26,884 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1435 flow [2023-08-31 01:23:26,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1435, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2023-08-31 01:23:26,884 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2023-08-31 01:23:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1435 flow [2023-08-31 01:23:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 667.6666666666666) internal successors, (4006), 6 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:26,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:26,885 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:26,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 01:23:27,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 01:23:27,090 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:27,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2101200279, now seen corresponding path program 2 times [2023-08-31 01:23:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280770567] [2023-08-31 01:23:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:27,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280770567] [2023-08-31 01:23:27,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280770567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:27,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:27,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:23:27,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688305090] [2023-08-31 01:23:27,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:27,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:27,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:27,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:23:27,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1435 flow. Second operand has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:27,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:27,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:23:27,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:30,279 INFO L130 PetriNetUnfolder]: 15133/21478 cut-off events. [2023-08-31 01:23:30,280 INFO L131 PetriNetUnfolder]: For 79389/79389 co-relation queries the response was YES. [2023-08-31 01:23:30,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80846 conditions, 21478 events. 15133/21478 cut-off events. For 79389/79389 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 117789 event pairs, 8830 based on Foata normal form. 4/18652 useless extension candidates. Maximal degree in co-relation 80784. Up to 18757 conditions per place. [2023-08-31 01:23:30,416 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 128 selfloop transitions, 3 changer transitions 58/189 dead transitions. [2023-08-31 01:23:30,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 2126 flow [2023-08-31 01:23:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2737 transitions. [2023-08-31 01:23:30,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552860696517414 [2023-08-31 01:23:30,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2737 transitions. [2023-08-31 01:23:30,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2737 transitions. [2023-08-31 01:23:30,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:30,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2737 transitions. [2023-08-31 01:23:30,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 684.25) internal successors, (2737), 4 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:30,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:30,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:30,426 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1435 flow. Second operand 4 states and 2737 transitions. [2023-08-31 01:23:30,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 2126 flow [2023-08-31 01:23:30,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2056 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-31 01:23:30,531 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1011 flow [2023-08-31 01:23:30,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1011, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2023-08-31 01:23:30,531 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-08-31 01:23:30,531 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1011 flow [2023-08-31 01:23:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:30,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:30,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:30,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:23:30,532 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:30,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2049052014, now seen corresponding path program 2 times [2023-08-31 01:23:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:30,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535094622] [2023-08-31 01:23:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:30,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:30,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535094622] [2023-08-31 01:23:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535094622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:30,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:30,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:23:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472490918] [2023-08-31 01:23:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:30,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:23:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:23:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:23:30,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 1608 [2023-08-31 01:23:30,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1011 flow. Second operand has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:30,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:30,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 1608 [2023-08-31 01:23:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:33,601 INFO L130 PetriNetUnfolder]: 13744/19200 cut-off events. [2023-08-31 01:23:33,601 INFO L131 PetriNetUnfolder]: For 60014/60014 co-relation queries the response was YES. [2023-08-31 01:23:33,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71251 conditions, 19200 events. 13744/19200 cut-off events. For 60014/60014 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 99419 event pairs, 3970 based on Foata normal form. 1/16577 useless extension candidates. Maximal degree in co-relation 71215. Up to 10228 conditions per place. [2023-08-31 01:23:33,722 INFO L137 encePairwiseOnDemand]: 1598/1608 looper letters, 140 selfloop transitions, 30 changer transitions 21/191 dead transitions. [2023-08-31 01:23:33,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 191 transitions, 1813 flow [2023-08-31 01:23:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:23:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:23:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3356 transitions. [2023-08-31 01:23:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174129353233831 [2023-08-31 01:23:33,726 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3356 transitions. [2023-08-31 01:23:33,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3356 transitions. [2023-08-31 01:23:33,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:33,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3356 transitions. [2023-08-31 01:23:33,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 671.2) internal successors, (3356), 5 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:33,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:33,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:33,733 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1011 flow. Second operand 5 states and 3356 transitions. [2023-08-31 01:23:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 191 transitions, 1813 flow [2023-08-31 01:23:33,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 191 transitions, 1682 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-31 01:23:33,880 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 1055 flow [2023-08-31 01:23:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1055, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2023-08-31 01:23:33,880 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 56 predicate places. [2023-08-31 01:23:33,880 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 1055 flow [2023-08-31 01:23:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:33,881 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 01:23:33,881 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:33,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1385030174, now seen corresponding path program 3 times [2023-08-31 01:23:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636693377] [2023-08-31 01:23:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:34,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:34,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636693377] [2023-08-31 01:23:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636693377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:34,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:23:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631637815] [2023-08-31 01:23:34,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:23:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:23:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:23:34,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 646 out of 1608 [2023-08-31 01:23:34,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 115 transitions, 1055 flow. Second operand has 5 states, 5 states have (on average 652.0) internal successors, (3260), 5 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:34,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:34,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 646 of 1608 [2023-08-31 01:23:34,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:36,953 INFO L130 PetriNetUnfolder]: 13803/19295 cut-off events. [2023-08-31 01:23:36,954 INFO L131 PetriNetUnfolder]: For 54068/54068 co-relation queries the response was YES. [2023-08-31 01:23:37,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70466 conditions, 19295 events. 13803/19295 cut-off events. For 54068/54068 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 100053 event pairs, 4074 based on Foata normal form. 3/16634 useless extension candidates. Maximal degree in co-relation 70433. Up to 10414 conditions per place. [2023-08-31 01:23:37,073 INFO L137 encePairwiseOnDemand]: 1597/1608 looper letters, 141 selfloop transitions, 29 changer transitions 10/180 dead transitions. [2023-08-31 01:23:37,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1718 flow [2023-08-31 01:23:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:23:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:23:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3341 transitions. [2023-08-31 01:23:37,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41554726368159206 [2023-08-31 01:23:37,078 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3341 transitions. [2023-08-31 01:23:37,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3341 transitions. [2023-08-31 01:23:37,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:37,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3341 transitions. [2023-08-31 01:23:37,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 668.2) internal successors, (3341), 5 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:37,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:37,084 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:37,084 INFO L175 Difference]: Start difference. First operand has 102 places, 115 transitions, 1055 flow. Second operand 5 states and 3341 transitions. [2023-08-31 01:23:37,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1718 flow [2023-08-31 01:23:37,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 180 transitions, 1672 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-31 01:23:37,190 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 1027 flow [2023-08-31 01:23:37,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1027, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2023-08-31 01:23:37,190 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-08-31 01:23:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 1027 flow [2023-08-31 01:23:37,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 652.0) internal successors, (3260), 5 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:37,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:37,191 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 01:23:37,191 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:37,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1385637435, now seen corresponding path program 1 times [2023-08-31 01:23:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:37,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081201799] [2023-08-31 01:23:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-31 01:23:37,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:37,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081201799] [2023-08-31 01:23:37,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081201799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:37,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:37,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:23:37,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475637849] [2023-08-31 01:23:37,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:37,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:37,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-08-31 01:23:37,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 1027 flow. Second operand has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:37,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:37,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-08-31 01:23:37,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:40,159 INFO L130 PetriNetUnfolder]: 13589/18915 cut-off events. [2023-08-31 01:23:40,159 INFO L131 PetriNetUnfolder]: For 68131/68131 co-relation queries the response was YES. [2023-08-31 01:23:40,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76499 conditions, 18915 events. 13589/18915 cut-off events. For 68131/68131 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 96930 event pairs, 8294 based on Foata normal form. 34/16323 useless extension candidates. Maximal degree in co-relation 76466. Up to 18039 conditions per place. [2023-08-31 01:23:40,271 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 133 selfloop transitions, 6 changer transitions 3/142 dead transitions. [2023-08-31 01:23:40,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1435 flow [2023-08-31 01:23:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2722 transitions. [2023-08-31 01:23:40,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319651741293535 [2023-08-31 01:23:40,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2722 transitions. [2023-08-31 01:23:40,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2722 transitions. [2023-08-31 01:23:40,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:40,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2722 transitions. [2023-08-31 01:23:40,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.5) internal successors, (2722), 4 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,280 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 1027 flow. Second operand 4 states and 2722 transitions. [2023-08-31 01:23:40,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1435 flow [2023-08-31 01:23:40,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 1312 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-08-31 01:23:40,414 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 900 flow [2023-08-31 01:23:40,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=900, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2023-08-31 01:23:40,415 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-08-31 01:23:40,415 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 900 flow [2023-08-31 01:23:40,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:40,415 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:40,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 01:23:40,416 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:40,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1997501473, now seen corresponding path program 2 times [2023-08-31 01:23:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:40,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542325904] [2023-08-31 01:23:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-31 01:23:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542325904] [2023-08-31 01:23:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542325904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:40,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:40,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:23:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523366328] [2023-08-31 01:23:40,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:40,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-08-31 01:23:40,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 900 flow. Second operand has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:40,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-08-31 01:23:40,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:43,395 INFO L130 PetriNetUnfolder]: 13367/18525 cut-off events. [2023-08-31 01:23:43,396 INFO L131 PetriNetUnfolder]: For 51781/51781 co-relation queries the response was YES. [2023-08-31 01:23:43,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70249 conditions, 18525 events. 13367/18525 cut-off events. For 51781/51781 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 93742 event pairs, 8230 based on Foata normal form. 6/15959 useless extension candidates. Maximal degree in co-relation 70220. Up to 18039 conditions per place. [2023-08-31 01:23:43,482 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 129 selfloop transitions, 1 changer transitions 8/138 dead transitions. [2023-08-31 01:23:43,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1277 flow [2023-08-31 01:23:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2720 transitions. [2023-08-31 01:23:43,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228855721393035 [2023-08-31 01:23:43,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2720 transitions. [2023-08-31 01:23:43,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2720 transitions. [2023-08-31 01:23:43,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:43,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2720 transitions. [2023-08-31 01:23:43,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:43,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:43,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:43,491 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 900 flow. Second operand 4 states and 2720 transitions. [2023-08-31 01:23:43,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1277 flow [2023-08-31 01:23:43,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 1275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:23:43,575 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 840 flow [2023-08-31 01:23:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2023-08-31 01:23:43,576 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-08-31 01:23:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 840 flow [2023-08-31 01:23:43,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:43,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:43,577 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 01:23:43,577 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:43,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1082557347, now seen corresponding path program 3 times [2023-08-31 01:23:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788805570] [2023-08-31 01:23:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:43,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:43,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788805570] [2023-08-31 01:23:43,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788805570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:23:43,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:23:43,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:23:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644116162] [2023-08-31 01:23:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:23:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:23:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:23:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:23:43,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 663 out of 1608 [2023-08-31 01:23:43,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 840 flow. Second operand has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:43,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:43,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 663 of 1608 [2023-08-31 01:23:43,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:46,422 INFO L130 PetriNetUnfolder]: 13084/18059 cut-off events. [2023-08-31 01:23:46,423 INFO L131 PetriNetUnfolder]: For 48835/48835 co-relation queries the response was YES. [2023-08-31 01:23:46,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 18059 events. 13084/18059 cut-off events. For 48835/48835 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 90097 event pairs, 2975 based on Foata normal form. 10/15587 useless extension candidates. Maximal degree in co-relation 68418. Up to 17847 conditions per place. [2023-08-31 01:23:46,498 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 111 selfloop transitions, 4 changer transitions 7/122 dead transitions. [2023-08-31 01:23:46,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 1099 flow [2023-08-31 01:23:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:23:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:23:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2719 transitions. [2023-08-31 01:23:46,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227300995024876 [2023-08-31 01:23:46,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2719 transitions. [2023-08-31 01:23:46,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2719 transitions. [2023-08-31 01:23:46,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:46,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2719 transitions. [2023-08-31 01:23:46,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 679.75) internal successors, (2719), 4 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:46,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:46,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:46,506 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 840 flow. Second operand 4 states and 2719 transitions. [2023-08-31 01:23:46,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 1099 flow [2023-08-31 01:23:46,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1041 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-31 01:23:46,685 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 694 flow [2023-08-31 01:23:46,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=694, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2023-08-31 01:23:46,685 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-31 01:23:46,685 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 694 flow [2023-08-31 01:23:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:46,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:46,686 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:46,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 01:23:46,686 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:23:46,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 275559464, now seen corresponding path program 1 times [2023-08-31 01:23:46,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892365152] [2023-08-31 01:23:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:48,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892365152] [2023-08-31 01:23:48,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892365152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024787292] [2023-08-31 01:23:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:48,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:48,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:48,629 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) [2023-08-31 01:23:48,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:23:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:23:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:23:49,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-08-31 01:23:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:23:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:51,181 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (forall ((~ends_with_6~0.base Int) (v_ArrVal_1507 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507) ~ends_with_6~0.base) c_~ends_with_6~0.offset) 256))))) (and (forall ((v_ArrVal_1507 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507))) (or (= (mod (select (select .cse0 c_~ends_with_2~0.base) (+ c_~i_13~0 c_~ends_with_2~0.offset)) 256) 0) (forall ((~ends_with_6~0.base Int)) (< 0 (mod (select (select .cse0 ~ends_with_6~0.base) c_~ends_with_6~0.offset) 256)))))) (or (< c_~i_13~0 4) .cse1) (or (= (mod (mod c_~break_14~0 256) 4294967296) 0) .cse1) (forall ((~ends_with_6~0.base Int) (v_ArrVal_1507 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507) ~ends_with_6~0.base))) (or (= (mod (select .cse2 (+ c_~i_13~0 c_~ends_with_6~0.offset)) 256) 0) (< 0 (mod (select .cse2 c_~ends_with_6~0.offset) 256))))))) is different from false [2023-08-31 01:23:51,475 INFO L321 Elim1Store]: treesize reduction 11, result has 83.1 percent of original size [2023-08-31 01:23:51,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 158 [2023-08-31 01:23:51,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:51,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 93 [2023-08-31 01:23:51,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:51,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 85 [2023-08-31 01:23:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:23:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024787292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:52,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 39 [2023-08-31 01:23:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057833306] [2023-08-31 01:23:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 01:23:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 01:23:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1292, Unknown=5, NotChecked=74, Total=1560 [2023-08-31 01:23:52,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 1608 [2023-08-31 01:23:52,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 694 flow. Second operand has 40 states, 40 states have (on average 532.75) internal successors, (21310), 40 states have internal predecessors, (21310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:52,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:52,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 1608 [2023-08-31 01:23:52,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:55,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:24:00,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:24:24,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:24:36,288 INFO L130 PetriNetUnfolder]: 84951/117526 cut-off events. [2023-08-31 01:24:36,288 INFO L131 PetriNetUnfolder]: For 223795/223795 co-relation queries the response was YES. [2023-08-31 01:24:36,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428567 conditions, 117526 events. 84951/117526 cut-off events. For 223795/223795 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 762710 event pairs, 6731 based on Foata normal form. 9/100450 useless extension candidates. Maximal degree in co-relation 428540. Up to 31160 conditions per place. [2023-08-31 01:24:37,309 INFO L137 encePairwiseOnDemand]: 1575/1608 looper letters, 2058 selfloop transitions, 685 changer transitions 555/3298 dead transitions. [2023-08-31 01:24:37,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 3298 transitions, 26913 flow [2023-08-31 01:24:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-08-31 01:24:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2023-08-31 01:24:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 75785 transitions. [2023-08-31 01:24:37,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390645692401303 [2023-08-31 01:24:37,369 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 75785 transitions. [2023-08-31 01:24:37,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 75785 transitions. [2023-08-31 01:24:37,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:24:37,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 75785 transitions. [2023-08-31 01:24:37,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 545.2158273381295) internal successors, (75785), 139 states have internal predecessors, (75785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:37,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 1608.0) internal successors, (225120), 140 states have internal predecessors, (225120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:37,596 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 1608.0) internal successors, (225120), 140 states have internal predecessors, (225120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:37,596 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 694 flow. Second operand 139 states and 75785 transitions. [2023-08-31 01:24:37,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 3298 transitions, 26913 flow [2023-08-31 01:24:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 3298 transitions, 26537 flow, removed 164 selfloop flow, removed 2 redundant places. [2023-08-31 01:24:50,597 INFO L231 Difference]: Finished difference. Result has 322 places, 860 transitions, 8925 flow [2023-08-31 01:24:50,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=8925, PETRI_PLACES=322, PETRI_TRANSITIONS=860} [2023-08-31 01:24:50,598 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 276 predicate places. [2023-08-31 01:24:50,598 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 860 transitions, 8925 flow [2023-08-31 01:24:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 532.75) internal successors, (21310), 40 states have internal predecessors, (21310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:24:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:24:50,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 01:24:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:50,801 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:24:50,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:24:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash -923697284, now seen corresponding path program 2 times [2023-08-31 01:24:50,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:24:50,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925707424] [2023-08-31 01:24:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:24:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:24:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:24:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:24:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:24:52,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925707424] [2023-08-31 01:24:52,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925707424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:24:52,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572267944] [2023-08-31 01:24:52,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:24:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:24:52,697 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) [2023-08-31 01:24:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:24:53,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:24:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:24:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 01:24:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:24:53,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-08-31 01:24:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:24:53,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:24:56,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:56,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 444 Killed by 15