./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/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-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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-dev-84cfde4 [2024-10-11 14:21:21,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:21:21,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:21:21,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:21:21,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:21:21,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:21:21,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:21:21,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:21:21,978 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:21:21,980 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:21:21,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:21:21,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:21:21,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:21:21,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:21:21,982 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:21:21,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:21:21,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:21:21,984 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:21:21,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:21:21,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:21:21,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:21:21,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:21:21,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:21:21,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:21:21,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:21:21,986 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:21:21,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:21:21,986 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:21:21,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:21:21,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:21:21,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:21:21,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:21:21,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:21:21,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:21:21,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:21:21,988 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:21:21,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:21:21,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:21:21,989 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:21:21,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:21:21,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:21:21,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:21:21,990 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2024-10-11 14:21:22,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:21:22,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:21:22,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:21:22,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:21:22,211 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:21:22,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-10-11 14:21:23,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:21:23,606 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:21:23,607 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-10-11 14:21:23,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bd77ea74/f762ce5077c94ffcaee48d84e47b712b/FLAG04140bf5e [2024-10-11 14:21:23,955 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bd77ea74/f762ce5077c94ffcaee48d84e47b712b [2024-10-11 14:21:23,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:21:23,961 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:21:23,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:21:23,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:21:23,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:21:23,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:23" (1/1) ... [2024-10-11 14:21:23,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62369729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:23, skipping insertion in model container [2024-10-11 14:21:23,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:23" (1/1) ... [2024-10-11 14:21:24,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:21:24,184 WARN L248 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] [2024-10-11 14:21:24,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:21:24,394 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:21:24,402 WARN L248 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] [2024-10-11 14:21:24,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:21:24,483 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:21:24,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24 WrapperNode [2024-10-11 14:21:24,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:21:24,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:21:24,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:21:24,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:21:24,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,534 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-10-11 14:21:24,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:21:24,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:21:24,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:21:24,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:21:24,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,566 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]. [2024-10-11 14:21:24,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:21:24,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:21:24,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:21:24,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:21:24,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2024-10-11 14:21:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:21:24,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:24,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:21:24,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:21:24,651 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2024-10-11 14:21:24,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:21:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:21:24,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:21:24,654 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:21:24,745 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:21:24,747 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:21:24,874 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:21:24,874 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:21:24,970 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:21:24,970 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:21:24,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:24 BoogieIcfgContainer [2024-10-11 14:21:24,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:21:24,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:21:24,973 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:21:24,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:21:24,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:23" (1/3) ... [2024-10-11 14:21:24,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f22d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:24, skipping insertion in model container [2024-10-11 14:21:24,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (2/3) ... [2024-10-11 14:21:24,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f22d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:24, skipping insertion in model container [2024-10-11 14:21:24,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:24" (3/3) ... [2024-10-11 14:21:24,978 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2024-10-11 14:21:24,990 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:21:24,991 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:21:24,992 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:21:25,023 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 14:21:25,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2024-10-11 14:21:25,066 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-10-11 14:21:25,066 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:21:25,068 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. [2024-10-11 14:21:25,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2024-10-11 14:21:25,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2024-10-11 14:21:25,077 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:21:25,082 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;@b914aac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:21:25,082 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-11 14:21:25,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:21:25,087 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-11 14:21:25,087 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:21:25,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:25,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:21:25,088 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:25,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 314256426, now seen corresponding path program 1 times [2024-10-11 14:21:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:25,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014961763] [2024-10-11 14:21:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:25,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:25,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014961763] [2024-10-11 14:21:25,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014961763] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:21:25,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:21:25,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:21:25,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974853872] [2024-10-11 14:21:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:21:25,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:21:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:21:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:21:25,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-11 14:21:25,376 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) [2024-10-11 14:21:25,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:25,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-11 14:21:25,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:25,453 INFO L124 PetriNetUnfolderBase]: 61/134 cut-off events. [2024-10-11 14:21:25,453 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:21:25,454 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. [2024-10-11 14:21:25,456 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-11 14:21:25,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2024-10-11 14:21:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:21:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:21:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-10-11 14:21:25,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 14:21:25,468 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2024-10-11 14:21:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2024-10-11 14:21:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:21:25,473 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2024-10-11 14:21:25,474 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} [2024-10-11 14:21:25,478 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2024-10-11 14:21:25,478 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2024-10-11 14:21:25,479 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) [2024-10-11 14:21:25,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:25,480 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:21:25,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:21:25,481 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:25,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1946104689, now seen corresponding path program 1 times [2024-10-11 14:21:25,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:25,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68024795] [2024-10-11 14:21:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:25,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:25,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:25,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68024795] [2024-10-11 14:21:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68024795] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:21:25,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:21:25,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:21:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918421525] [2024-10-11 14:21:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:21:25,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:21:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:21:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:21:25,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-11 14:21:25,586 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) [2024-10-11 14:21:25,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:25,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-11 14:21:25,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:25,657 INFO L124 PetriNetUnfolderBase]: 101/220 cut-off events. [2024-10-11 14:21:25,657 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-10-11 14:21:25,658 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. [2024-10-11 14:21:25,660 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-10-11 14:21:25,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2024-10-11 14:21:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:21:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:21:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-10-11 14:21:25,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 14:21:25,664 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-10-11 14:21:25,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2024-10-11 14:21:25,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:21:25,665 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2024-10-11 14:21:25,665 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} [2024-10-11 14:21:25,666 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-10-11 14:21:25,666 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2024-10-11 14:21:25,668 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) [2024-10-11 14:21:25,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:25,669 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] [2024-10-11 14:21:25,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:21:25,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:25,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151760, now seen corresponding path program 1 times [2024-10-11 14:21:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:25,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831808855] [2024-10-11 14:21:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:25,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:25,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831808855] [2024-10-11 14:21:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831808855] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:21:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:21:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:21:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713258274] [2024-10-11 14:21:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:21:25,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:21:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:21:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:21:25,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-11 14:21:25,791 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) [2024-10-11 14:21:25,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:25,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-11 14:21:25,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:25,862 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2024-10-11 14:21:25,863 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-11 14:21:25,864 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. [2024-10-11 14:21:25,865 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-10-11 14:21:25,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2024-10-11 14:21:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:21:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:21:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-11 14:21:25,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-11 14:21:25,868 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-10-11 14:21:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2024-10-11 14:21:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:21:25,869 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2024-10-11 14:21:25,869 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} [2024-10-11 14:21:25,871 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2024-10-11 14:21:25,872 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2024-10-11 14:21:25,872 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) [2024-10-11 14:21:25,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:25,872 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] [2024-10-11 14:21:25,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:21:25,872 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:25,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1080335954, now seen corresponding path program 2 times [2024-10-11 14:21:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:25,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699158836] [2024-10-11 14:21:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699158836] [2024-10-11 14:21:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699158836] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460012162] [2024-10-11 14:21:25,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:21:25,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:25,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:25,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:21:26,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:21:26,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:26,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:21:26,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:26,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460012162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:26,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:26,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-11 14:21:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738727755] [2024-10-11 14:21:26,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:26,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:21:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:21:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:21:26,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:26,112 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) [2024-10-11 14:21:26,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:26,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:26,236 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2024-10-11 14:21:26,236 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-10-11 14:21:26,237 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. [2024-10-11 14:21:26,240 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-10-11 14:21:26,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2024-10-11 14:21:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:21:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:21:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-11 14:21:26,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 14:21:26,242 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2024-10-11 14:21:26,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2024-10-11 14:21:26,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:21:26,245 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2024-10-11 14:21:26,246 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} [2024-10-11 14:21:26,246 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2024-10-11 14:21:26,247 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2024-10-11 14:21:26,247 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) [2024-10-11 14:21:26,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:26,247 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] [2024-10-11 14:21:26,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:21:26,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:26,448 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:26,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1211202341, now seen corresponding path program 3 times [2024-10-11 14:21:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544292620] [2024-10-11 14:21:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:26,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 14:21:26,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:26,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544292620] [2024-10-11 14:21:26,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544292620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:26,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170182072] [2024-10-11 14:21:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:21:26,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:26,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:26,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:21:26,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:21:26,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:26,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:21:26,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 14:21:26,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-11 14:21:26,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170182072] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:26,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:26,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-11 14:21:26,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219903466] [2024-10-11 14:21:26,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:26,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:21:26,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:21:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:21:26,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:26,663 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) [2024-10-11 14:21:26,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:26,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:26,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:26,775 INFO L124 PetriNetUnfolderBase]: 289/674 cut-off events. [2024-10-11 14:21:26,775 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2024-10-11 14:21:26,777 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. [2024-10-11 14:21:26,779 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-10-11 14:21:26,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2024-10-11 14:21:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:21:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:21:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-11 14:21:26,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 14:21:26,781 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2024-10-11 14:21:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2024-10-11 14:21:26,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-10-11 14:21:26,784 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2024-10-11 14:21:26,784 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} [2024-10-11 14:21:26,784 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-10-11 14:21:26,784 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2024-10-11 14:21:26,785 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) [2024-10-11 14:21:26,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:26,785 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] [2024-10-11 14:21:26,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:21:26,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:26,986 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:26,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 855375968, now seen corresponding path program 4 times [2024-10-11 14:21:26,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:26,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641168301] [2024-10-11 14:21:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:21:27,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641168301] [2024-10-11 14:21:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641168301] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13164395] [2024-10-11 14:21:27,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:21:27,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:27,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:27,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:21:27,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:21:27,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:27,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:21:27,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:21:27,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:21:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13164395] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:27,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 14:21:27,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143343893] [2024-10-11 14:21:27,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:27,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:21:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:21:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:21:27,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:27,323 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) [2024-10-11 14:21:27,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:27,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:27,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:27,565 INFO L124 PetriNetUnfolderBase]: 642/1516 cut-off events. [2024-10-11 14:21:27,566 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-10-11 14:21:27,569 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. [2024-10-11 14:21:27,574 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 144 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2024-10-11 14:21:27,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 160 transitions, 1098 flow [2024-10-11 14:21:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:21:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:21:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-10-11 14:21:27,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-11 14:21:27,576 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 12 states and 189 transitions. [2024-10-11 14:21:27,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 160 transitions, 1098 flow [2024-10-11 14:21:27,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 160 transitions, 1078 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-11 14:21:27,582 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 226 flow [2024-10-11 14:21:27,582 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} [2024-10-11 14:21:27,582 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2024-10-11 14:21:27,583 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 226 flow [2024-10-11 14:21:27,583 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) [2024-10-11 14:21:27,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:27,583 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] [2024-10-11 14:21:27,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:21:27,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:27,785 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:27,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1064182416, now seen corresponding path program 5 times [2024-10-11 14:21:27,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:27,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227137784] [2024-10-11 14:21:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-11 14:21:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227137784] [2024-10-11 14:21:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227137784] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309607885] [2024-10-11 14:21:27,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:21:27,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:27,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:27,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:21:28,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-10-11 14:21:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:28,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:21:28,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-11 14:21:28,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-11 14:21:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309607885] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:28,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 14:21:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351203627] [2024-10-11 14:21:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:28,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:21:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:21:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:21:28,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:28,254 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) [2024-10-11 14:21:28,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:28,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:28,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:28,672 INFO L124 PetriNetUnfolderBase]: 1434/3383 cut-off events. [2024-10-11 14:21:28,672 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-10-11 14:21:28,678 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. [2024-10-11 14:21:28,690 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 210 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-10-11 14:21:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 227 transitions, 2146 flow [2024-10-11 14:21:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:21:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:21:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-10-11 14:21:28,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-11 14:21:28,692 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 226 flow. Second operand 12 states and 189 transitions. [2024-10-11 14:21:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 227 transitions, 2146 flow [2024-10-11 14:21:28,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 227 transitions, 2080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:21:28,702 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 316 flow [2024-10-11 14:21:28,703 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} [2024-10-11 14:21:28,703 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 52 predicate places. [2024-10-11 14:21:28,703 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 316 flow [2024-10-11 14:21:28,704 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) [2024-10-11 14:21:28,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:28,704 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] [2024-10-11 14:21:28,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:21:28,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 14:21:28,905 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:28,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1757091020, now seen corresponding path program 6 times [2024-10-11 14:21:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191169896] [2024-10-11 14:21:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-11 14:21:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191169896] [2024-10-11 14:21:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191169896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:29,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516894879] [2024-10-11 14:21:29,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:21:29,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:29,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:29,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:29,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:21:29,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-10-11 14:21:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:29,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:21:29,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-10-11 14:21:29,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-10-11 14:21:29,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516894879] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:29,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:29,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-10-11 14:21:29,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474606686] [2024-10-11 14:21:29,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:29,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:21:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:21:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 14:21:29,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:29,903 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) [2024-10-11 14:21:29,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:29,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:29,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:37,436 INFO L124 PetriNetUnfolderBase]: 3231/7540 cut-off events. [2024-10-11 14:21:37,436 INFO L125 PetriNetUnfolderBase]: For 47002/47002 co-relation queries the response was YES. [2024-10-11 14:21:37,453 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. [2024-10-11 14:21:37,513 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1774 selfloop transitions, 516 changer transitions 0/2295 dead transitions. [2024-10-11 14:21:37,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2295 transitions, 16226 flow [2024-10-11 14:21:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-10-11 14:21:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2024-10-11 14:21:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 3696 transitions. [2024-10-11 14:21:37,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-10-11 14:21:37,525 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 316 flow. Second operand 253 states and 3696 transitions. [2024-10-11 14:21:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2295 transitions, 16226 flow [2024-10-11 14:21:37,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2295 transitions, 16154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:21:37,570 INFO L231 Difference]: Finished difference. Result has 465 places, 557 transitions, 6998 flow [2024-10-11 14:21:37,574 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} [2024-10-11 14:21:37,574 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2024-10-11 14:21:37,575 INFO L471 AbstractCegarLoop]: Abstraction has has 465 places, 557 transitions, 6998 flow [2024-10-11 14:21:37,575 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) [2024-10-11 14:21:37,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:37,575 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] [2024-10-11 14:21:37,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:21:37,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:37,776 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:37,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash -14787069, now seen corresponding path program 7 times [2024-10-11 14:21:37,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:37,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523975509] [2024-10-11 14:21:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:37,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-11 14:21:38,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523975509] [2024-10-11 14:21:38,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523975509] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479263085] [2024-10-11 14:21:38,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:21:38,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:38,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:38,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:21:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:38,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:21:38,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-11 14:21:38,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-11 14:21:38,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479263085] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:38,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:38,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-10-11 14:21:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885792463] [2024-10-11 14:21:38,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:38,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:21:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:21:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:21:38,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:21:38,743 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) [2024-10-11 14:21:38,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:38,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:21:38,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:21:42,791 INFO L124 PetriNetUnfolderBase]: 5333/12525 cut-off events. [2024-10-11 14:21:42,791 INFO L125 PetriNetUnfolderBase]: For 1304784/1304784 co-relation queries the response was YES. [2024-10-11 14:21:42,889 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. [2024-10-11 14:21:42,929 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1069 dead transitions. [2024-10-11 14:21:42,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1069 transitions, 19162 flow [2024-10-11 14:21:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:21:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:21:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 352 transitions. [2024-10-11 14:21:42,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-11 14:21:42,930 INFO L175 Difference]: Start difference. First operand has 465 places, 557 transitions, 6998 flow. Second operand 22 states and 352 transitions. [2024-10-11 14:21:42,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1069 transitions, 19162 flow [2024-10-11 14:21:45,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1069 transitions, 18406 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-10-11 14:21:45,696 INFO L231 Difference]: Finished difference. Result has 478 places, 726 transitions, 9756 flow [2024-10-11 14:21:45,697 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} [2024-10-11 14:21:45,698 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 456 predicate places. [2024-10-11 14:21:45,698 INFO L471 AbstractCegarLoop]: Abstraction has has 478 places, 726 transitions, 9756 flow [2024-10-11 14:21:45,698 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) [2024-10-11 14:21:45,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:21:45,698 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] [2024-10-11 14:21:45,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:21:45,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 14:21:45,899 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:21:45,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:21:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1208228154, now seen corresponding path program 8 times [2024-10-11 14:21:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:21:45,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957530642] [2024-10-11 14:21:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:21:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:21:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:21:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:48,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:21:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957530642] [2024-10-11 14:21:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957530642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:21:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875747627] [2024-10-11 14:21:48,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:21:48,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:21:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:21:48,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:21:48,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:21:48,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:21:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:21:48,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-10-11 14:21:48,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:21:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:48,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:21:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:21:48,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875747627] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:21:48,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:21:48,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2024-10-11 14:21:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745802041] [2024-10-11 14:21:48,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:21:48,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-11 14:21:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:21:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-11 14:21:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 14:21:48,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-10-11 14:21:48,932 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) [2024-10-11 14:21:48,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:21:48,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-10-11 14:21:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:22:03,979 INFO L124 PetriNetUnfolderBase]: 9445/25453 cut-off events. [2024-10-11 14:22:03,980 INFO L125 PetriNetUnfolderBase]: For 9243126/9243126 co-relation queries the response was YES. [2024-10-11 14:22:04,251 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. [2024-10-11 14:22:04,558 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2887 selfloop transitions, 83 changer transitions 2/2992 dead transitions. [2024-10-11 14:22:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2992 transitions, 49655 flow [2024-10-11 14:22:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-11 14:22:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-11 14:22:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2024-10-11 14:22:04,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-10-11 14:22:04,560 INFO L175 Difference]: Start difference. First operand has 478 places, 726 transitions, 9756 flow. Second operand 44 states and 644 transitions. [2024-10-11 14:22:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2992 transitions, 49655 flow [2024-10-11 14:22:41,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 2992 transitions, 48049 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-11 14:22:41,783 INFO L231 Difference]: Finished difference. Result has 512 places, 808 transitions, 9636 flow [2024-10-11 14:22:41,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9636, PETRI_PLACES=512, PETRI_TRANSITIONS=808} [2024-10-11 14:22:41,785 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 490 predicate places. [2024-10-11 14:22:41,785 INFO L471 AbstractCegarLoop]: Abstraction has has 512 places, 808 transitions, 9636 flow [2024-10-11 14:22:41,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-10-11 14:22:41,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:41,785 INFO L204 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:22:41,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:22:41,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:22:41,986 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:41,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash -560963671, now seen corresponding path program 9 times [2024-10-11 14:22:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412213095] [2024-10-11 14:22:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 96 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-10-11 14:22:42,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:22:42,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412213095] [2024-10-11 14:22:42,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412213095] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:22:42,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237614656] [2024-10-11 14:22:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:22:42,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:22:42,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:22:42,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:22:42,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:22:42,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-10-11 14:22:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:22:42,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:22:42,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:22:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-10-11 14:22:43,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:22:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237614656] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:22:43,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:22:43,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-10-11 14:22:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823270578] [2024-10-11 14:22:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:22:43,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:22:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:22:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:22:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:22:43,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-11 14:22:43,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 808 transitions, 9636 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:22:43,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:22:43,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-11 14:22:43,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:22:51,534 INFO L124 PetriNetUnfolderBase]: 9411/21653 cut-off events. [2024-10-11 14:22:51,535 INFO L125 PetriNetUnfolderBase]: For 10685898/10685898 co-relation queries the response was YES. [2024-10-11 14:22:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261489 conditions, 21653 events. 9411/21653 cut-off events. For 10685898/10685898 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 160212 event pairs, 271 based on Foata normal form. 89/21480 useless extension candidates. Maximal degree in co-relation 261304. Up to 4121 conditions per place. [2024-10-11 14:22:51,817 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 1957 selfloop transitions, 441 changer transitions 0/2415 dead transitions. [2024-10-11 14:22:51,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 2415 transitions, 27940 flow [2024-10-11 14:22:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:22:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:22:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 354 transitions. [2024-10-11 14:22:51,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-10-11 14:22:51,818 INFO L175 Difference]: Start difference. First operand has 512 places, 808 transitions, 9636 flow. Second operand 23 states and 354 transitions. [2024-10-11 14:22:51,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 2415 transitions, 27940 flow