./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.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 --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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:29:49,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:29:50,013 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:29:50,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:29:50,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:29:50,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:29:50,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:29:50,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:29:50,057 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:29:50,058 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:29:50,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:29:50,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:29:50,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:29:50,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:29:50,062 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:29:50,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:29:50,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:29:50,063 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:29:50,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:29:50,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:29:50,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:29:50,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:29:50,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:29:50,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:29:50,065 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:29:50,066 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:29:50,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:29:50,066 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:29:50,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:29:50,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:29:50,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:29:50,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:29:50,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:29:50,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:29:50,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:29:50,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:29:50,070 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:29:50,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:29:50,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:29:50,071 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:29:50,071 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:29:50,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:29:50,071 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2024-11-20 09:29:50,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:29:50,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:29:50,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:29:50,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:29:50,344 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:29:50,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-11-20 09:29:51,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:29:52,048 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:29:52,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-11-20 09:29:52,068 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bbb02375/1109f76268f842cab08c229c98e0e0a1/FLAG20ae71612 [2024-11-20 09:29:52,357 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bbb02375/1109f76268f842cab08c229c98e0e0a1 [2024-11-20 09:29:52,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:29:52,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:29:52,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:29:52,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:29:52,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:29:52,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:52" (1/1) ... [2024-11-20 09:29:52,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477dfd57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:52, skipping insertion in model container [2024-11-20 09:29:52,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:52" (1/1) ... [2024-11-20 09:29:52,428 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:29:52,617 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-11-20 09:29:52,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:29:52,934 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:29:52,944 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-11-20 09:29:53,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:29:53,116 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:29:53,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53 WrapperNode [2024-11-20 09:29:53,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:29:53,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:29:53,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:29:53,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:29:53,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,187 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-20 09:29:53,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:29:53,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:29:53,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:29:53,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:29:53,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,225 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-11-20 09:29:53,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,225 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:29:53,253 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:29:53,253 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:29:53,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:29:53,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (1/1) ... [2024-11-20 09:29:53,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:29:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:53,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 09:29:53,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 09:29:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 09:29:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 09:29:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:29:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2024-11-20 09:29:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2024-11-20 09:29:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:29:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:29:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:29:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:29:53,351 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:29:53,469 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:29:53,471 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:29:53,638 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:29:53,639 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:29:53,777 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:29:53,778 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 09:29:53,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:53 BoogieIcfgContainer [2024-11-20 09:29:53,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:29:53,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:29:53,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:29:53,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:29:53,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:29:52" (1/3) ... [2024-11-20 09:29:53,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5116fd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:53, skipping insertion in model container [2024-11-20 09:29:53,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:53" (2/3) ... [2024-11-20 09:29:53,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5116fd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:53, skipping insertion in model container [2024-11-20 09:29:53,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:53" (3/3) ... [2024-11-20 09:29:53,790 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2024-11-20 09:29:53,808 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:29:53,808 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:29:53,810 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:29:53,849 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-20 09:29:53,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2024-11-20 09:29:53,912 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-11-20 09:29:53,914 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:29:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-20 09:29:53,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2024-11-20 09:29:53,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2024-11-20 09:29:53,931 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:29:53,939 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67d5b3a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:29:53,940 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-20 09:29:53,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:29:53,949 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-20 09:29:53,949 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:29:53,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:53,951 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:53,951 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:53,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 314256426, now seen corresponding path program 1 times [2024-11-20 09:29:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:53,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656183452] [2024-11-20 09:29:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:54,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:54,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656183452] [2024-11-20 09:29:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656183452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:29:54,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:29:54,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:29:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275962968] [2024-11-20 09:29:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:29:54,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:29:54,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:29:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:29:54,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-11-20 09:29:54,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:54,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-11-20 09:29:54,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:54,380 INFO L124 PetriNetUnfolderBase]: 61/134 cut-off events. [2024-11-20 09:29:54,380 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:29:54,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 134 events. 61/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 409 event pairs, 27 based on Foata normal form. 6/139 useless extension candidates. Maximal degree in co-relation 248. Up to 77 conditions per place. [2024-11-20 09:29:54,385 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-20 09:29:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2024-11-20 09:29:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:29:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:29:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-11-20 09:29:54,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 09:29:54,399 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2024-11-20 09:29:54,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2024-11-20 09:29:54,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:29:54,404 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2024-11-20 09:29:54,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2024-11-20 09:29:54,411 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2024-11-20 09:29:54,411 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2024-11-20 09:29:54,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:54,412 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:54,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:29:54,413 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:54,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1946104689, now seen corresponding path program 1 times [2024-11-20 09:29:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700331520] [2024-11-20 09:29:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700331520] [2024-11-20 09:29:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700331520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:29:54,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:29:54,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:29:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765907223] [2024-11-20 09:29:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:29:54,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:29:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:29:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:29:54,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-11-20 09:29:54,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:54,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-11-20 09:29:54,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:54,615 INFO L124 PetriNetUnfolderBase]: 101/220 cut-off events. [2024-11-20 09:29:54,616 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-20 09:29:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 220 events. 101/220 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 762 event pairs, 53 based on Foata normal form. 10/230 useless extension candidates. Maximal degree in co-relation 144. Up to 125 conditions per place. [2024-11-20 09:29:54,618 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-11-20 09:29:54,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2024-11-20 09:29:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:29:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:29:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-11-20 09:29:54,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 09:29:54,620 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-11-20 09:29:54,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2024-11-20 09:29:54,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:29:54,622 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2024-11-20 09:29:54,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-11-20 09:29:54,623 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-11-20 09:29:54,623 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2024-11-20 09:29:54,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:54,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:54,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:29:54,624 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:54,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151760, now seen corresponding path program 1 times [2024-11-20 09:29:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997206282] [2024-11-20 09:29:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:54,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997206282] [2024-11-20 09:29:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997206282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:29:54,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:29:54,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:29:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597651614] [2024-11-20 09:29:54,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:29:54,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:29:54,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:29:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:29:54,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-11-20 09:29:54,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:54,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-11-20 09:29:54,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:54,880 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2024-11-20 09:29:54,880 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 09:29:54,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 532 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 132. Up to 80 conditions per place. [2024-11-20 09:29:54,882 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-11-20 09:29:54,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2024-11-20 09:29:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:29:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:29:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-11-20 09:29:54,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-20 09:29:54,886 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-11-20 09:29:54,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2024-11-20 09:29:54,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:29:54,888 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2024-11-20 09:29:54,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-11-20 09:29:54,890 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2024-11-20 09:29:54,890 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2024-11-20 09:29:54,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:54,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:54,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:54,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:29:54,891 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:54,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1080335954, now seen corresponding path program 2 times [2024-11-20 09:29:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106184598] [2024-11-20 09:29:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:54,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106184598] [2024-11-20 09:29:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106184598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:29:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985441029] [2024-11-20 09:29:54,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:29:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:54,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:29:54,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:29:55,046 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:29:55,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:29:55,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 09:29:55,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:29:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:55,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:29:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:29:55,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985441029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:29:55,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:29:55,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 09:29:55,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871531235] [2024-11-20 09:29:55,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:29:55,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:29:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:29:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:29:55,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:29:55,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:55,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:55,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:29:55,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:55,305 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2024-11-20 09:29:55,309 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-11-20 09:29:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1288 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2024-11-20 09:29:55,313 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-11-20 09:29:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2024-11-20 09:29:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:29:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:29:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-20 09:29:55,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 09:29:55,315 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2024-11-20 09:29:55,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2024-11-20 09:29:55,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:29:55,324 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2024-11-20 09:29:55,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2024-11-20 09:29:55,325 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2024-11-20 09:29:55,326 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2024-11-20 09:29:55,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:55,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:55,327 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:55,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:29:55,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:55,528 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:55,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1211202341, now seen corresponding path program 3 times [2024-11-20 09:29:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:55,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139448213] [2024-11-20 09:29:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:55,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:29:55,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:55,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139448213] [2024-11-20 09:29:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139448213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:29:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982202830] [2024-11-20 09:29:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:29:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:55,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:29:55,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:29:55,770 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:29:55,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:29:55,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 09:29:55,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:29:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:29:55,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:29:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:29:55,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982202830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:29:55,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:29:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 09:29:55,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137129336] [2024-11-20 09:29:55,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:29:55,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:29:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:29:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:29:55,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:29:55,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:55,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:55,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:29:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:56,013 INFO L124 PetriNetUnfolderBase]: 289/674 cut-off events. [2024-11-20 09:29:56,014 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2024-11-20 09:29:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 674 events. 289/674 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2894 event pairs, 28 based on Foata normal form. 57/731 useless extension candidates. Maximal degree in co-relation 1212. Up to 156 conditions per place. [2024-11-20 09:29:56,020 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-11-20 09:29:56,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2024-11-20 09:29:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:29:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:29:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-20 09:29:56,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 09:29:56,022 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2024-11-20 09:29:56,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2024-11-20 09:29:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-20 09:29:56,026 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2024-11-20 09:29:56,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-11-20 09:29:56,027 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-11-20 09:29:56,027 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2024-11-20 09:29:56,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:56,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:56,028 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:56,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:29:56,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:56,232 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:56,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 855375968, now seen corresponding path program 4 times [2024-11-20 09:29:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:56,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153606301] [2024-11-20 09:29:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 09:29:56,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153606301] [2024-11-20 09:29:56,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153606301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:29:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801299620] [2024-11-20 09:29:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:29:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:56,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:29:56,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:29:56,560 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:29:56,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:29:56,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:29:56,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:29:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 09:29:56,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:29:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 09:29:56,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801299620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:29:56,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:29:56,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-20 09:29:56,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731172661] [2024-11-20 09:29:56,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:29:56,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:29:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:29:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:29:56,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:29:56,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:56,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:56,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:29:56,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:57,135 INFO L124 PetriNetUnfolderBase]: 642/1516 cut-off events. [2024-11-20 09:29:57,136 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-11-20 09:29:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 1516 events. 642/1516 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 6900 event pairs, 51 based on Foata normal form. 114/1630 useless extension candidates. Maximal degree in co-relation 3154. Up to 265 conditions per place. [2024-11-20 09:29:57,147 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 144 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2024-11-20 09:29:57,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 160 transitions, 1098 flow [2024-11-20 09:29:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:29:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:29:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-11-20 09:29:57,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-20 09:29:57,151 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 12 states and 189 transitions. [2024-11-20 09:29:57,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 160 transitions, 1098 flow [2024-11-20 09:29:57,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 160 transitions, 1078 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-20 09:29:57,165 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 226 flow [2024-11-20 09:29:57,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2024-11-20 09:29:57,167 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2024-11-20 09:29:57,168 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 226 flow [2024-11-20 09:29:57,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:57,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:57,168 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:57,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:29:57,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:57,373 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:57,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1064182416, now seen corresponding path program 5 times [2024-11-20 09:29:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:57,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732834335] [2024-11-20 09:29:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-20 09:29:57,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732834335] [2024-11-20 09:29:57,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732834335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:29:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356777113] [2024-11-20 09:29:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:29:57,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:57,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:29:57,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:29:57,723 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-20 09:29:57,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:29:57,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:29:57,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:29:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-20 09:29:57,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:29:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-20 09:29:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356777113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:29:57,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:29:57,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-20 09:29:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400125192] [2024-11-20 09:29:57,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:29:57,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:29:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:29:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:29:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:29:58,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:29:58,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 226 flow. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:58,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:29:58,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:29:58,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:29:58,634 INFO L124 PetriNetUnfolderBase]: 1434/3383 cut-off events. [2024-11-20 09:29:58,634 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-11-20 09:29:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11992 conditions, 3383 events. 1434/3383 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18782 event pairs, 117 based on Foata normal form. 258/3641 useless extension candidates. Maximal degree in co-relation 9580. Up to 583 conditions per place. [2024-11-20 09:29:58,661 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 210 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-11-20 09:29:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 227 transitions, 2146 flow [2024-11-20 09:29:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:29:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:29:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-11-20 09:29:58,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-20 09:29:58,667 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 226 flow. Second operand 12 states and 189 transitions. [2024-11-20 09:29:58,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 227 transitions, 2146 flow [2024-11-20 09:29:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 227 transitions, 2080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 09:29:58,686 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 316 flow [2024-11-20 09:29:58,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=316, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2024-11-20 09:29:58,688 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 52 predicate places. [2024-11-20 09:29:58,688 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 316 flow [2024-11-20 09:29:58,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:29:58,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:29:58,690 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:29:58,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:29:58,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:58,891 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:29:58,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:29:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1757091020, now seen corresponding path program 6 times [2024-11-20 09:29:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:29:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188941357] [2024-11-20 09:29:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:29:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:29:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:29:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-20 09:29:59,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:29:59,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188941357] [2024-11-20 09:29:59,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188941357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:29:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214027039] [2024-11-20 09:29:59,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:29:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:29:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:29:59,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:29:59,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:29:59,539 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-20 09:29:59,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:29:59,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 09:29:59,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:29:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-20 09:29:59,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:30:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-20 09:30:00,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214027039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:30:00,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:30:00,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-11-20 09:30:00,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268431800] [2024-11-20 09:30:00,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:30:00,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 09:30:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:30:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 09:30:00,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 09:30:00,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:30:00,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 316 flow. Second operand has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:30:00,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:30:00,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:30:00,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:30:09,958 INFO L124 PetriNetUnfolderBase]: 3231/7540 cut-off events. [2024-11-20 09:30:09,959 INFO L125 PetriNetUnfolderBase]: For 47002/47002 co-relation queries the response was YES. [2024-11-20 09:30:09,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30035 conditions, 7540 events. 3231/7540 cut-off events. For 47002/47002 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 45055 event pairs, 10 based on Foata normal form. 603/8143 useless extension candidates. Maximal degree in co-relation 20856. Up to 1339 conditions per place. [2024-11-20 09:30:10,036 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1774 selfloop transitions, 516 changer transitions 0/2295 dead transitions. [2024-11-20 09:30:10,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2295 transitions, 16226 flow [2024-11-20 09:30:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-11-20 09:30:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2024-11-20 09:30:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 3696 transitions. [2024-11-20 09:30:10,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-11-20 09:30:10,048 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 316 flow. Second operand 253 states and 3696 transitions. [2024-11-20 09:30:10,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2295 transitions, 16226 flow [2024-11-20 09:30:10,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2295 transitions, 16154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 09:30:10,112 INFO L231 Difference]: Finished difference. Result has 465 places, 557 transitions, 6998 flow [2024-11-20 09:30:10,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=6998, PETRI_PLACES=465, PETRI_TRANSITIONS=557} [2024-11-20 09:30:10,113 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2024-11-20 09:30:10,113 INFO L471 AbstractCegarLoop]: Abstraction has has 465 places, 557 transitions, 6998 flow [2024-11-20 09:30:10,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:30:10,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:30:10,114 INFO L204 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:30:10,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:30:10,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:30:10,318 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:30:10,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:30:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -14787069, now seen corresponding path program 7 times [2024-11-20 09:30:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:30:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784267330] [2024-11-20 09:30:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:30:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:30:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:30:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-20 09:30:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:30:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784267330] [2024-11-20 09:30:10,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784267330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:30:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613143351] [2024-11-20 09:30:10,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:30:10,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:30:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:30:10,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:30:10,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:30:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:30:11,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-20 09:30:11,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:30:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-20 09:30:11,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:30:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-20 09:30:11,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613143351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:30:11,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:30:11,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-11-20 09:30:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003648064] [2024-11-20 09:30:11,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:30:11,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:30:11,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:30:11,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:30:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:30:11,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-20 09:30:11,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 557 transitions, 6998 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:30:11,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:30:11,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-20 09:30:11,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:30:16,285 INFO L124 PetriNetUnfolderBase]: 5333/12525 cut-off events. [2024-11-20 09:30:16,285 INFO L125 PetriNetUnfolderBase]: For 1304784/1304784 co-relation queries the response was YES. [2024-11-20 09:30:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71347 conditions, 12525 events. 5333/12525 cut-off events. For 1304784/1304784 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 82568 event pairs, 306 based on Foata normal form. 747/13254 useless extension candidates. Maximal degree in co-relation 66323. Up to 2163 conditions per place. [2024-11-20 09:30:16,519 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1069 dead transitions. [2024-11-20 09:30:16,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1069 transitions, 19162 flow [2024-11-20 09:30:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:30:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:30:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 352 transitions. [2024-11-20 09:30:16,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-20 09:30:16,521 INFO L175 Difference]: Start difference. First operand has 465 places, 557 transitions, 6998 flow. Second operand 22 states and 352 transitions. [2024-11-20 09:30:16,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1069 transitions, 19162 flow [2024-11-20 09:30:19,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1069 transitions, 18406 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-11-20 09:30:19,613 INFO L231 Difference]: Finished difference. Result has 478 places, 726 transitions, 9756 flow [2024-11-20 09:30:19,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9756, PETRI_PLACES=478, PETRI_TRANSITIONS=726} [2024-11-20 09:30:19,614 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 456 predicate places. [2024-11-20 09:30:19,614 INFO L471 AbstractCegarLoop]: Abstraction has has 478 places, 726 transitions, 9756 flow [2024-11-20 09:30:19,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:30:19,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:30:19,615 INFO L204 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:30:19,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 09:30:19,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:30:19,817 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:30:19,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:30:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1208228154, now seen corresponding path program 8 times [2024-11-20 09:30:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:30:19,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832572729] [2024-11-20 09:30:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:30:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:30:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:30:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:30:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:30:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832572729] [2024-11-20 09:30:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832572729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:30:22,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862201363] [2024-11-20 09:30:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:30:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:30:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:30:22,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:30:22,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:30:23,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:30:23,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:30:23,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-20 09:30:23,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:30:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:30:23,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:30:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:30:23,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862201363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:30:23,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:30:23,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2024-11-20 09:30:23,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639469306] [2024-11-20 09:30:23,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:30:23,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-20 09:30:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:30:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-20 09:30:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2024-11-20 09:30:23,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-20 09:30:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 726 transitions, 9756 flow. Second operand has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:30:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:30:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-20 09:30:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:30:42,608 INFO L124 PetriNetUnfolderBase]: 9445/25453 cut-off events. [2024-11-20 09:30:42,609 INFO L125 PetriNetUnfolderBase]: For 9243126/9243126 co-relation queries the response was YES. [2024-11-20 09:30:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280445 conditions, 25453 events. 9445/25453 cut-off events. For 9243126/9243126 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 212100 event pairs, 1275 based on Foata normal form. 1/25379 useless extension candidates. Maximal degree in co-relation 228414. Up to 4324 conditions per place. [2024-11-20 09:30:43,687 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2887 selfloop transitions, 83 changer transitions 2/2992 dead transitions. [2024-11-20 09:30:43,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2992 transitions, 49655 flow [2024-11-20 09:30:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-20 09:30:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-20 09:30:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2024-11-20 09:30:43,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-11-20 09:30:43,691 INFO L175 Difference]: Start difference. First operand has 478 places, 726 transitions, 9756 flow. Second operand 44 states and 644 transitions. [2024-11-20 09:30:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2992 transitions, 49655 flow