./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i --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/pthread-ext/46_monabsex2_vs.i -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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:03:30,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:03:30,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:03:30,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:03:30,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:03:30,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:03:30,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:03:30,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:03:30,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:03:30,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:03:30,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:03:30,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:03:30,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:03:30,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:03:30,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:03:30,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:03:30,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:03:30,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:03:30,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:03:30,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:03:30,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:03:30,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:03:30,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:03:30,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:03:30,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:03:30,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:03:30,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:03:30,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:03:30,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:03:30,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:03:30,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:03:30,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:03:30,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:03:30,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:03:30,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:03:30,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:03:30,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:03:30,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:03:30,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:03:30,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:03:30,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:03:30,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:03:30,507 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:03:30,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:03:30,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:03:30,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:03:30,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:03:30,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:03:30,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:03:30,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:03:30,510 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:03:30,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:03:30,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:03:30,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:03:30,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:03:30,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:03:30,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:03:30,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:03:30,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:03:30,514 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:03:30,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:03:30,514 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:03:30,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:03:30,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:03:30,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:03:30,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:03:30,762 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:03:30,762 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:03:30,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-30 23:03:31,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:03:31,893 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:03:31,895 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-30 23:03:31,910 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94bfd74b3/57351e4d9c97421daa0615492e28868a/FLAG1150254fa [2023-08-30 23:03:31,924 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94bfd74b3/57351e4d9c97421daa0615492e28868a [2023-08-30 23:03:31,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:03:31,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:03:31,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:03:31,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:03:31,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:03:31,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:03:31" (1/1) ... [2023-08-30 23:03:31,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c27648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:31, skipping insertion in model container [2023-08-30 23:03:31,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:03:31" (1/1) ... [2023-08-30 23:03:31,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:03:31,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:03:32,110 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:03:32,206 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-08-30 23:03:32,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:03:32,221 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:03:32,231 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:03:32,243 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-08-30 23:03:32,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:03:32,274 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:32,276 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:32,276 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:32,281 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:03:32,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32 WrapperNode [2023-08-30 23:03:32,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:03:32,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:03:32,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:03:32,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:03:32,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,303 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-08-30 23:03:32,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:03:32,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:03:32,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:03:32,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:03:32,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:03:32,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:03:32,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:03:32,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:03:32,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (1/1) ... [2023-08-30 23:03:32,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:03:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:03:32,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 23:03:32,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 23:03:32,362 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:03:32,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:03:32,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:03:32,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:03:32,364 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:03:32,453 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:03:32,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:03:32,576 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:03:32,587 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:03:32,587 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 23:03:32,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:03:32 BoogieIcfgContainer [2023-08-30 23:03:32,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:03:32,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:03:32,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:03:32,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:03:32,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:03:31" (1/3) ... [2023-08-30 23:03:32,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6d630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:03:32, skipping insertion in model container [2023-08-30 23:03:32,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:32" (2/3) ... [2023-08-30 23:03:32,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6d630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:03:32, skipping insertion in model container [2023-08-30 23:03:32,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:03:32" (3/3) ... [2023-08-30 23:03:32,593 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-08-30 23:03:32,598 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:03:32,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:03:32,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:03:32,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:03:32,624 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,675 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2023-08-30 23:03:32,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:32,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 43 events. 2/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-08-30 23:03:32,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:32,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 23:03:32,724 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2023-08-30 23:03:32,726 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:32,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 43 events. 2/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-08-30 23:03:32,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 182 [2023-08-30 23:03:33,508 INFO L134 LiptonReduction]: Checked pairs total: 151 [2023-08-30 23:03:33,509 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-08-30 23:03:33,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:33,532 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:33,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 23:03:33,534 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-30 23:03:33,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:33,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:33,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:33,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:03:33,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash 4673506, now seen corresponding path program 1 times [2023-08-30 23:03:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:33,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743285850] [2023-08-30 23:03:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743285850] [2023-08-30 23:03:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743285850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:33,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:33,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:33,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021490548] [2023-08-30 23:03:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:33,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:33,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2023-08-30 23:03:33,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:33,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:33,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2023-08-30 23:03:33,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:33,777 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 23:03:33,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-08-30 23:03:33,778 INFO L137 encePairwiseOnDemand]: 56/60 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-08-30 23:03:33,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-08-30 23:03:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-08-30 23:03:33,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-30 23:03:33,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-08-30 23:03:33,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-08-30 23:03:33,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:33,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-08-30 23:03:33,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:33,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:33,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:33,797 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 3 states and 88 transitions. [2023-08-30 23:03:33,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-08-30 23:03:33,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:33,801 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 21 flow [2023-08-30 23:03:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-08-30 23:03:33,805 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-08-30 23:03:33,805 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 21 flow [2023-08-30 23:03:33,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:33,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:33,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 23:03:33,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:03:33,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:03:33,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 196283379, now seen corresponding path program 1 times [2023-08-30 23:03:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:33,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902981665] [2023-08-30 23:03:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:33,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:33,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:33,859 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:33,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 23:03:33,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 23:03:33,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 23:03:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:03:33,863 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:03:33,866 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:33,866 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:03:33,878 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:33,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,887 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-08-30 23:03:33,887 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:03:33,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 3/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 6 conditions per place. [2023-08-30 23:03:33,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:33,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 23:03:33,904 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-08-30 23:03:33,904 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:03:33,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 3/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 6 conditions per place. [2023-08-30 23:03:33,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 476 [2023-08-30 23:03:34,469 INFO L134 LiptonReduction]: Checked pairs total: 853 [2023-08-30 23:03:34,469 INFO L136 LiptonReduction]: Total number of compositions: 28 [2023-08-30 23:03:34,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:34,471 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:34,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:03:34,472 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:34,472 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:34,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:34,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:34,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:34,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 7044781, now seen corresponding path program 1 times [2023-08-30 23:03:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891100999] [2023-08-30 23:03:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:34,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891100999] [2023-08-30 23:03:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891100999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:34,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404269161] [2023-08-30 23:03:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:34,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:34,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 69 [2023-08-30 23:03:34,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:34,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:34,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 69 [2023-08-30 23:03:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:34,556 INFO L130 PetriNetUnfolder]: 22/66 cut-off events. [2023-08-30 23:03:34,556 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 23:03:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 66 events. 22/66 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 217 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 32 conditions per place. [2023-08-30 23:03:34,558 INFO L137 encePairwiseOnDemand]: 63/69 looper letters, 13 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 23:03:34,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 91 flow [2023-08-30 23:03:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2023-08-30 23:03:34,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2023-08-30 23:03:34,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2023-08-30 23:03:34,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2023-08-30 23:03:34,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:34,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2023-08-30 23:03:34,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:34,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:34,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:34,564 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 110 transitions. [2023-08-30 23:03:34,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 91 flow [2023-08-30 23:03:34,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 89 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:34,565 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 61 flow [2023-08-30 23:03:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-30 23:03:34,566 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2023-08-30 23:03:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 61 flow [2023-08-30 23:03:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:34,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:34,567 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 23:03:34,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:03:34,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:34,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash -543476183, now seen corresponding path program 1 times [2023-08-30 23:03:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:34,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966119152] [2023-08-30 23:03:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:34,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:34,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:34,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:34,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:34,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:03:34,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:03:34,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:03:34,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:03:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:03:34,593 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:03:34,593 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:34,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:03:34,601 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:34,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,609 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 23:03:34,609 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:03:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 83 events. 4/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 67. Up to 8 conditions per place. [2023-08-30 23:03:34,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:34,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 23:03:34,626 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 23:03:34,626 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:03:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 83 events. 4/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 67. Up to 8 conditions per place. [2023-08-30 23:03:34,627 INFO L119 LiptonReduction]: Number of co-enabled transitions 882 [2023-08-30 23:03:35,250 INFO L134 LiptonReduction]: Checked pairs total: 1796 [2023-08-30 23:03:35,250 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-30 23:03:35,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:35,252 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:35,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:03:35,253 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:35,253 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:35,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:35,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:35,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:35,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 9784402, now seen corresponding path program 1 times [2023-08-30 23:03:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480221852] [2023-08-30 23:03:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480221852] [2023-08-30 23:03:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480221852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092238578] [2023-08-30 23:03:35,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:35,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-08-30 23:03:35,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:35,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-08-30 23:03:35,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:35,387 INFO L130 PetriNetUnfolder]: 162/314 cut-off events. [2023-08-30 23:03:35,387 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 23:03:35,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 314 events. 162/314 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1405 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 139. Up to 226 conditions per place. [2023-08-30 23:03:35,392 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-30 23:03:35,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 137 flow [2023-08-30 23:03:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-08-30 23:03:35,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2023-08-30 23:03:35,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-08-30 23:03:35,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-08-30 23:03:35,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:35,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-08-30 23:03:35,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,396 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 63 flow. Second operand 3 states and 130 transitions. [2023-08-30 23:03:35,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 137 flow [2023-08-30 23:03:35,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 129 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:35,397 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 85 flow [2023-08-30 23:03:35,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-30 23:03:35,398 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-30 23:03:35,398 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 85 flow [2023-08-30 23:03:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:35,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:03:35,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:35,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash -53509643, now seen corresponding path program 1 times [2023-08-30 23:03:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:35,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739458433] [2023-08-30 23:03:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739458433] [2023-08-30 23:03:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739458433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:35,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961680250] [2023-08-30 23:03:35,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:35,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:35,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-08-30 23:03:35,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:35,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-08-30 23:03:35,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:35,479 INFO L130 PetriNetUnfolder]: 279/467 cut-off events. [2023-08-30 23:03:35,479 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 23:03:35,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 467 events. 279/467 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2047 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 820. Up to 392 conditions per place. [2023-08-30 23:03:35,481 INFO L137 encePairwiseOnDemand]: 75/81 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-08-30 23:03:35,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 153 flow [2023-08-30 23:03:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-30 23:03:35,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267489711934157 [2023-08-30 23:03:35,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-30 23:03:35,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-30 23:03:35,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:35,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-30 23:03:35,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,483 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 85 flow. Second operand 3 states and 128 transitions. [2023-08-30 23:03:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 153 flow [2023-08-30 23:03:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:35,484 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 90 flow [2023-08-30 23:03:35,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-30 23:03:35,485 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-08-30 23:03:35,485 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 90 flow [2023-08-30 23:03:35,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:35,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:35,485 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 23:03:35,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:03:35,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:35,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash 234322574, now seen corresponding path program 1 times [2023-08-30 23:03:35,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:35,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324218743] [2023-08-30 23:03:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:35,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:35,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:35,513 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:35,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:35,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:03:35,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:03:35,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 23:03:35,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:03:35,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:03:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:03:35,515 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:35,515 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:35,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:03:35,522 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,533 INFO L130 PetriNetUnfolder]: 5/103 cut-off events. [2023-08-30 23:03:35,533 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 103 events. 5/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 91. Up to 10 conditions per place. [2023-08-30 23:03:35,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,534 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:35,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 23:03:35,543 INFO L130 PetriNetUnfolder]: 5/103 cut-off events. [2023-08-30 23:03:35,543 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:35,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 103 events. 5/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 91. Up to 10 conditions per place. [2023-08-30 23:03:35,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-08-30 23:03:36,214 INFO L134 LiptonReduction]: Checked pairs total: 3359 [2023-08-30 23:03:36,215 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-08-30 23:03:36,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:36,216 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:36,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:03:36,217 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:36,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:36,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:36,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:36,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:36,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash 12889583, now seen corresponding path program 1 times [2023-08-30 23:03:36,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:36,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149076268] [2023-08-30 23:03:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:36,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:36,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149076268] [2023-08-30 23:03:36,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149076268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:36,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981317544] [2023-08-30 23:03:36,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:36,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-08-30 23:03:36,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:36,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-08-30 23:03:36,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:36,346 INFO L130 PetriNetUnfolder]: 1032/1602 cut-off events. [2023-08-30 23:03:36,346 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2023-08-30 23:03:36,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1602 events. 1032/1602 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8292 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 682. Up to 1390 conditions per place. [2023-08-30 23:03:36,353 INFO L137 encePairwiseOnDemand]: 83/93 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-08-30 23:03:36,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 187 flow [2023-08-30 23:03:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-08-30 23:03:36,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2023-08-30 23:03:36,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-08-30 23:03:36,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-08-30 23:03:36,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:36,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-08-30 23:03:36,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,357 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 3 states and 150 transitions. [2023-08-30 23:03:36,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 187 flow [2023-08-30 23:03:36,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:36,358 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 109 flow [2023-08-30 23:03:36,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-30 23:03:36,359 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 23:03:36,359 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 109 flow [2023-08-30 23:03:36,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:36,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:03:36,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:36,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 285277102, now seen corresponding path program 1 times [2023-08-30 23:03:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687950069] [2023-08-30 23:03:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:36,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:36,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687950069] [2023-08-30 23:03:36,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687950069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:36,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:36,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121783484] [2023-08-30 23:03:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:36,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-08-30 23:03:36,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:36,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-08-30 23:03:36,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:36,512 INFO L130 PetriNetUnfolder]: 1623/2343 cut-off events. [2023-08-30 23:03:36,512 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-30 23:03:36,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2343 events. 1623/2343 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11353 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 4274. Up to 2160 conditions per place. [2023-08-30 23:03:36,521 INFO L137 encePairwiseOnDemand]: 85/93 looper letters, 30 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-30 23:03:36,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 200 flow [2023-08-30 23:03:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-08-30 23:03:36,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2023-08-30 23:03:36,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-08-30 23:03:36,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-08-30 23:03:36,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:36,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-08-30 23:03:36,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,524 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 109 flow. Second operand 3 states and 148 transitions. [2023-08-30 23:03:36,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 200 flow [2023-08-30 23:03:36,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:36,526 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 116 flow [2023-08-30 23:03:36,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-30 23:03:36,526 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-30 23:03:36,526 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 116 flow [2023-08-30 23:03:36,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:36,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:36,527 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:03:36,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:36,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1317652234, now seen corresponding path program 1 times [2023-08-30 23:03:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093463074] [2023-08-30 23:03:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:36,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:36,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:36,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:36,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:03:36,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:03:36,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:03:36,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:03:36,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:03:36,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:03:36,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:03:36,545 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:36,546 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:36,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 23:03:36,555 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:36,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,561 INFO L130 PetriNetUnfolder]: 6/123 cut-off events. [2023-08-30 23:03:36,561 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:36,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 6/123 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2023-08-30 23:03:36,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,562 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:36,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,563 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 23:03:36,568 INFO L130 PetriNetUnfolder]: 6/123 cut-off events. [2023-08-30 23:03:36,568 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:36,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 6/123 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2023-08-30 23:03:36,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 2030 [2023-08-30 23:03:37,310 INFO L134 LiptonReduction]: Checked pairs total: 5350 [2023-08-30 23:03:37,310 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-08-30 23:03:37,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:37,311 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:37,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:03:37,312 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:37,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:37,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:37,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:37,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:37,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 16370893, now seen corresponding path program 1 times [2023-08-30 23:03:37,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:37,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142531202] [2023-08-30 23:03:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:37,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:37,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:37,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142531202] [2023-08-30 23:03:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142531202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:37,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:37,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226571707] [2023-08-30 23:03:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:37,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-08-30 23:03:37,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:37,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-08-30 23:03:37,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:37,841 INFO L130 PetriNetUnfolder]: 5980/8248 cut-off events. [2023-08-30 23:03:37,841 INFO L131 PetriNetUnfolder]: For 3486/3486 co-relation queries the response was YES. [2023-08-30 23:03:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17869 conditions, 8248 events. 5980/8248 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45221 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 3516. Up to 7756 conditions per place. [2023-08-30 23:03:37,893 INFO L137 encePairwiseOnDemand]: 93/105 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-08-30 23:03:37,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 241 flow [2023-08-30 23:03:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-08-30 23:03:37,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-08-30 23:03:37,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-08-30 23:03:37,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-08-30 23:03:37,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:37,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-08-30 23:03:37,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,898 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 107 flow. Second operand 3 states and 170 transitions. [2023-08-30 23:03:37,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 241 flow [2023-08-30 23:03:37,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 209 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:37,902 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 133 flow [2023-08-30 23:03:37,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-30 23:03:37,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-30 23:03:37,903 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 133 flow [2023-08-30 23:03:37,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:37,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 23:03:37,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:37,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1366666922, now seen corresponding path program 1 times [2023-08-30 23:03:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:37,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572795510] [2023-08-30 23:03:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572795510] [2023-08-30 23:03:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572795510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:37,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57005833] [2023-08-30 23:03:37,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:37,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-08-30 23:03:37,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:37,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:37,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-08-30 23:03:37,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:38,590 INFO L130 PetriNetUnfolder]: 8535/11343 cut-off events. [2023-08-30 23:03:38,591 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2023-08-30 23:03:38,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27936 conditions, 11343 events. 8535/11343 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57498 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20700. Up to 10912 conditions per place. [2023-08-30 23:03:38,635 INFO L137 encePairwiseOnDemand]: 95/105 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-08-30 23:03:38,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 247 flow [2023-08-30 23:03:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-30 23:03:38,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-30 23:03:38,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-30 23:03:38,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-30 23:03:38,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:38,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-30 23:03:38,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:38,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:38,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:38,638 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 133 flow. Second operand 3 states and 168 transitions. [2023-08-30 23:03:38,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 247 flow [2023-08-30 23:03:38,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:38,641 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 142 flow [2023-08-30 23:03:38,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-30 23:03:38,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 23:03:38,642 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 142 flow [2023-08-30 23:03:38,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:38,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:38,642 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 23:03:38,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:38,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1817445209, now seen corresponding path program 1 times [2023-08-30 23:03:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:38,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906219319] [2023-08-30 23:03:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:38,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:38,683 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:38,684 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:38,684 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 23:03:38,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 23:03:38,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 23:03:38,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 23:03:38,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 23:03:38,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 23:03:38,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 23:03:38,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 23:03:38,685 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:38,686 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:38,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 23:03:38,701 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:38,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,711 INFO L130 PetriNetUnfolder]: 7/143 cut-off events. [2023-08-30 23:03:38,712 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 143 events. 7/143 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 14 conditions per place. [2023-08-30 23:03:38,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:38,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 23:03:38,723 INFO L130 PetriNetUnfolder]: 7/143 cut-off events. [2023-08-30 23:03:38,723 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:38,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 143 events. 7/143 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 14 conditions per place. [2023-08-30 23:03:38,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772 [2023-08-30 23:03:39,516 INFO L134 LiptonReduction]: Checked pairs total: 7378 [2023-08-30 23:03:39,516 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 23:03:39,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:39,545 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:39,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 23:03:39,546 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:39,546 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:39,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:39,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:39,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:39,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash 20213923, now seen corresponding path program 1 times [2023-08-30 23:03:39,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:39,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587367666] [2023-08-30 23:03:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:39,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:39,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:39,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587367666] [2023-08-30 23:03:39,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587367666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:39,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:39,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400628377] [2023-08-30 23:03:39,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:39,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:39,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:39,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-08-30 23:03:39,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:39,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:39,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-08-30 23:03:39,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:41,966 INFO L130 PetriNetUnfolder]: 32246/41520 cut-off events. [2023-08-30 23:03:41,967 INFO L131 PetriNetUnfolder]: For 20783/20783 co-relation queries the response was YES. [2023-08-30 23:03:42,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90073 conditions, 41520 events. 32246/41520 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 232333 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 18129. Up to 40404 conditions per place. [2023-08-30 23:03:42,244 INFO L137 encePairwiseOnDemand]: 103/117 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-30 23:03:42,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 299 flow [2023-08-30 23:03:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-30 23:03:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-08-30 23:03:42,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-30 23:03:42,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-30 23:03:42,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:42,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-30 23:03:42,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:42,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:42,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:42,247 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 132 flow. Second operand 3 states and 190 transitions. [2023-08-30 23:03:42,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 299 flow [2023-08-30 23:03:42,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 249 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:42,258 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 157 flow [2023-08-30 23:03:42,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-30 23:03:42,259 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-30 23:03:42,259 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 157 flow [2023-08-30 23:03:42,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:42,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:42,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 23:03:42,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:42,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1813634434, now seen corresponding path program 1 times [2023-08-30 23:03:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:42,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953056402] [2023-08-30 23:03:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:42,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953056402] [2023-08-30 23:03:42,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953056402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:42,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:42,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304629928] [2023-08-30 23:03:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:42,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:42,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:42,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-08-30 23:03:42,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:42,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:42,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-08-30 23:03:42,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:45,143 INFO L130 PetriNetUnfolder]: 42327/53407 cut-off events. [2023-08-30 23:03:45,144 INFO L131 PetriNetUnfolder]: For 13148/13148 co-relation queries the response was YES. [2023-08-30 23:03:45,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130277 conditions, 53407 events. 42327/53407 cut-off events. For 13148/13148 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 279678 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96838. Up to 52416 conditions per place. [2023-08-30 23:03:45,588 INFO L137 encePairwiseOnDemand]: 105/117 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-08-30 23:03:45,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 294 flow [2023-08-30 23:03:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-30 23:03:45,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356125356125356 [2023-08-30 23:03:45,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-30 23:03:45,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-30 23:03:45,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:45,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-30 23:03:45,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:45,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:45,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:45,591 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 157 flow. Second operand 3 states and 188 transitions. [2023-08-30 23:03:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 294 flow [2023-08-30 23:03:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:45,597 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 168 flow [2023-08-30 23:03:45,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-30 23:03:45,598 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-30 23:03:45,598 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 168 flow [2023-08-30 23:03:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:45,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:45,599 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 23:03:45,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:45,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2137383609, now seen corresponding path program 1 times [2023-08-30 23:03:45,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:45,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525957510] [2023-08-30 23:03:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:45,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:45,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:45,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:45,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 23:03:45,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 23:03:45,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 23:03:45,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 23:03:45,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 23:03:45,632 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:45,633 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:45,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 23:03:45,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:45,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,658 INFO L130 PetriNetUnfolder]: 8/163 cut-off events. [2023-08-30 23:03:45,658 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:03:45,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 163 events. 8/163 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 249 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 173. Up to 16 conditions per place. [2023-08-30 23:03:45,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,660 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:45,660 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,660 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 23:03:45,668 INFO L130 PetriNetUnfolder]: 8/163 cut-off events. [2023-08-30 23:03:45,668 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:03:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 163 events. 8/163 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 249 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 173. Up to 16 conditions per place. [2023-08-30 23:03:45,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 3626 [2023-08-30 23:03:46,513 INFO L134 LiptonReduction]: Checked pairs total: 9627 [2023-08-30 23:03:46,513 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-08-30 23:03:46,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:46,514 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:46,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 23:03:46,515 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:46,515 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:46,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:03:46,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 24431177, now seen corresponding path program 1 times [2023-08-30 23:03:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620152153] [2023-08-30 23:03:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620152153] [2023-08-30 23:03:46,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620152153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:46,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:46,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918551420] [2023-08-30 23:03:46,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:46,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:46,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:46,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-08-30 23:03:46,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:46,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:46,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-08-30 23:03:46,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:57,798 INFO L130 PetriNetUnfolder]: 164558/202770 cut-off events. [2023-08-30 23:03:57,798 INFO L131 PetriNetUnfolder]: For 117491/117491 co-relation queries the response was YES. [2023-08-30 23:03:58,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439990 conditions, 202770 events. 164558/202770 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1153629 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 91161. Up to 200278 conditions per place. [2023-08-30 23:03:59,219 INFO L137 encePairwiseOnDemand]: 113/129 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-08-30 23:03:59,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 361 flow [2023-08-30 23:03:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-08-30 23:03:59,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2023-08-30 23:03:59,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-08-30 23:03:59,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-08-30 23:03:59,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:59,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-08-30 23:03:59,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:59,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:59,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:59,223 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 159 flow. Second operand 3 states and 210 transitions. [2023-08-30 23:03:59,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 361 flow [2023-08-30 23:03:59,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 289 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:59,251 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 181 flow [2023-08-30 23:03:59,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-30 23:03:59,252 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-30 23:03:59,252 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 181 flow [2023-08-30 23:03:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:59,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:59,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 23:03:59,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:03:59,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -938990020, now seen corresponding path program 1 times [2023-08-30 23:03:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:59,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114324093] [2023-08-30 23:03:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:59,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:59,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114324093] [2023-08-30 23:03:59,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114324093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:59,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:59,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578770077] [2023-08-30 23:03:59,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:59,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:59,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-08-30 23:03:59,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:59,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:59,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-08-30 23:03:59,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:12,045 INFO L130 PetriNetUnfolder]: 202071/246079 cut-off events. [2023-08-30 23:04:12,046 INFO L131 PetriNetUnfolder]: For 64830/64830 co-relation queries the response was YES. [2023-08-30 23:04:12,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595332 conditions, 246079 events. 202071/246079 cut-off events. For 64830/64830 co-relation queries the response was YES. Maximal size of possible extension queue 8505. Compared 1323879 event pairs, 60901 based on Foata normal form. 58602/304353 useless extension candidates. Maximal degree in co-relation 443168. Up to 243840 conditions per place. [2023-08-30 23:04:13,380 INFO L137 encePairwiseOnDemand]: 115/129 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-08-30 23:04:13,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 341 flow [2023-08-30 23:04:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-30 23:04:13,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537467700258398 [2023-08-30 23:04:13,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-30 23:04:13,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-30 23:04:13,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:13,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-30 23:04:13,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:13,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:13,383 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 181 flow. Second operand 3 states and 208 transitions. [2023-08-30 23:04:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 341 flow [2023-08-30 23:04:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:04:13,424 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 194 flow [2023-08-30 23:04:13,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-30 23:04:13,425 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-30 23:04:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 194 flow [2023-08-30 23:04:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:13,425 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 23:04:13,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:04:13,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1774382960, now seen corresponding path program 1 times [2023-08-30 23:04:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106021063] [2023-08-30 23:04:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:13,435 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:04:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:13,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:04:13,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:04:13,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 23:04:13,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 23:04:13,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 23:04:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 23:04:13,445 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:04:13,445 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:04:13,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-30 23:04:13,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:04:13,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,469 INFO L130 PetriNetUnfolder]: 9/183 cut-off events. [2023-08-30 23:04:13,469 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 23:04:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 183 events. 9/183 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 203. Up to 18 conditions per place. [2023-08-30 23:04:13,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,470 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:04:13,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 23:04:13,478 INFO L130 PetriNetUnfolder]: 9/183 cut-off events. [2023-08-30 23:04:13,478 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 23:04:13,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 183 events. 9/183 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 203. Up to 18 conditions per place. [2023-08-30 23:04:13,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-30 23:04:14,396 INFO L134 LiptonReduction]: Checked pairs total: 10908 [2023-08-30 23:04:14,396 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-08-30 23:04:14,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:04:14,397 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:04:14,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 23:04:14,398 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:04:14,398 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:04:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:04:14,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 23:04:14,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash 29018812, now seen corresponding path program 1 times [2023-08-30 23:04:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498447156] [2023-08-30 23:04:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:04:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498447156] [2023-08-30 23:04:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498447156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:14,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:04:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406328521] [2023-08-30 23:04:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:14,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:14,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-08-30 23:04:14,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:14,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:14,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-08-30 23:04:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:17,230 INFO L130 PetriNetUnfolder]: 805204/962454 cut-off events. [2023-08-30 23:05:17,230 INFO L131 PetriNetUnfolder]: For 634919/634919 co-relation queries the response was YES. [2023-08-30 23:05:19,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088284 conditions, 962454 events. 805204/962454 cut-off events. For 634919/634919 co-relation queries the response was YES. Maximal size of possible extension queue 40190. Compared 5520133 event pairs, 317473 based on Foata normal form. 0/676445 useless extension candidates. Maximal degree in co-relation 444540. Up to 956954 conditions per place. [2023-08-30 23:05:24,132 INFO L137 encePairwiseOnDemand]: 123/141 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2023-08-30 23:05:24,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 427 flow [2023-08-30 23:05:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 23:05:24,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2023-08-30 23:05:24,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 23:05:24,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 23:05:24,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:24,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 23:05:24,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:24,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:24,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:24,135 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 188 flow. Second operand 3 states and 230 transitions. [2023-08-30 23:05:24,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 427 flow [2023-08-30 23:05:24,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 329 flow, removed 49 selfloop flow, removed 0 redundant places. [2023-08-30 23:05:24,706 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 205 flow [2023-08-30 23:05:24,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-30 23:05:24,707 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-30 23:05:24,707 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 205 flow [2023-08-30 23:05:24,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:24,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:24,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:24,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 23:05:24,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 23:05:24,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -359689833, now seen corresponding path program 1 times [2023-08-30 23:05:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:24,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113121612] [2023-08-30 23:05:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:05:24,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:24,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113121612] [2023-08-30 23:05:24,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113121612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:05:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491454880] [2023-08-30 23:05:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:05:24,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:05:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:05:24,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-08-30 23:05:24,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:24,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:24,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-08-30 23:05:24,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:06:25,558 INFO L130 PetriNetUnfolder]: 939351/1114751 cut-off events. [2023-08-30 23:06:25,559 INFO L131 PetriNetUnfolder]: For 309390/309390 co-relation queries the response was YES. [2023-08-30 23:06:29,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678709 conditions, 1114751 events. 939351/1114751 cut-off events. For 309390/309390 co-relation queries the response was YES. Maximal size of possible extension queue 32749. Compared 6095195 event pairs, 310359 based on Foata normal form. 285754/1399728 useless extension candidates. Maximal degree in co-relation 1995954. Up to 1109760 conditions per place. [2023-08-30 23:06:33,459 INFO L137 encePairwiseOnDemand]: 125/141 looper letters, 58 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2023-08-30 23:06:33,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 388 flow [2023-08-30 23:06:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:06:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:06:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-30 23:06:33,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2023-08-30 23:06:33,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-30 23:06:33,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-30 23:06:33,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:06:33,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-30 23:06:33,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:33,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:33,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:33,482 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 205 flow. Second operand 3 states and 228 transitions. [2023-08-30 23:06:33,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 388 flow [2023-08-30 23:06:34,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:06:34,025 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 220 flow [2023-08-30 23:06:34,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-08-30 23:06:34,031 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -4 predicate places. [2023-08-30 23:06:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 220 flow [2023-08-30 23:06:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:06:34,032 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:06:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 23:06:34,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 23:06:34,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:06:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414655, now seen corresponding path program 1 times [2023-08-30 23:06:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:06:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14941853] [2023-08-30 23:06:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:06:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:06:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:06:34,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:06:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:06:34,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:06:34,070 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-08-30 23:06:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-08-30 23:06:34,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 23:06:34,071 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:06:34,072 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:06:34,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-30 23:06:34,102 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:06:34,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,127 INFO L130 PetriNetUnfolder]: 10/203 cut-off events. [2023-08-30 23:06:34,127 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 23:06:34,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 203 events. 10/203 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 234. Up to 20 conditions per place. [2023-08-30 23:06:34,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,128 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:06:34,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 23:06:34,140 INFO L130 PetriNetUnfolder]: 10/203 cut-off events. [2023-08-30 23:06:34,140 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 23:06:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 203 events. 10/203 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 234. Up to 20 conditions per place. [2023-08-30 23:06:34,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 5670 [2023-08-30 23:06:35,329 INFO L134 LiptonReduction]: Checked pairs total: 14090 [2023-08-30 23:06:35,329 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 23:06:35,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:06:35,331 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;@6916d98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:06:35,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 23:06:35,332 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 23:06:35,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:06:35,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:06:35,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:06:35,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 23:06:35,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:06:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 33977751, now seen corresponding path program 1 times [2023-08-30 23:06:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:06:35,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568807717] [2023-08-30 23:06:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:06:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:06:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:06:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:06:35,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:06:35,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568807717] [2023-08-30 23:06:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568807717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:06:35,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:06:35,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:06:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678772018] [2023-08-30 23:06:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:06:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:06:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:06:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:06:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:06:35,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 153 [2023-08-30 23:06:35,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:35,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:06:35,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 153 [2023-08-30 23:06:35,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand