./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:08:22,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:08:22,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:08:22,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:08:22,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:08:22,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:08:22,230 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:08:22,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:08:22,231 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:08:22,234 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:08:22,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:08:22,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:08:22,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:08:22,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:08:22,235 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:08:22,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:08:22,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:08:22,236 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:08:22,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:08:22,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:08:22,236 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:08:22,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:08:22,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:08:22,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:08:22,239 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:08:22,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:08:22,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:08:22,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:08:22,240 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:08:22,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:08:22,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:08:22,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:08:22,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:08:22,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:08:22,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:08:22,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:08:22,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:08:22,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:08:22,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:08:22,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:08:22,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:08:22,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:08:22,244 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2024-11-16 19:08:22,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:08:22,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:08:22,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:08:22,480 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:08:22,481 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:08:22,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2024-11-16 19:08:23,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:08:23,854 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:08:23,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2024-11-16 19:08:23,865 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcc97bae/93f6ba38eb57401e8903b94d5ebec12f/FLAG3cf85e3eb [2024-11-16 19:08:24,238 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcc97bae/93f6ba38eb57401e8903b94d5ebec12f [2024-11-16 19:08:24,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:08:24,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:08:24,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:08:24,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:08:24,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:08:24,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbcc0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24, skipping insertion in model container [2024-11-16 19:08:24,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,281 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:08:24,524 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2024-11-16 19:08:24,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:08:24,538 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:08:24,580 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2024-11-16 19:08:24,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:08:24,608 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:08:24,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24 WrapperNode [2024-11-16 19:08:24,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:08:24,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:08:24,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:08:24,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:08:24,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,641 INFO L138 Inliner]: procedures = 168, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-11-16 19:08:24,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:08:24,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:08:24,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:08:24,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:08:24,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,651 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,666 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 19:08:24,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,669 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:08:24,677 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:08:24,679 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:08:24,679 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:08:24,680 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (1/1) ... [2024-11-16 19:08:24,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:08:24,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:08:24,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:08:24,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:08:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-16 19:08:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-16 19:08:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:08:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:08:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:08:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:08:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:08:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:08:24,760 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:08:24,854 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:08:24,856 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:08:24,913 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:08:24,913 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:08:24,971 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:08:24,971 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:08:24,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:08:24 BoogieIcfgContainer [2024-11-16 19:08:24,971 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:08:24,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:08:24,973 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:08:24,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:08:24,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:08:24" (1/3) ... [2024-11-16 19:08:24,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df407e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:08:24, skipping insertion in model container [2024-11-16 19:08:24,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:08:24" (2/3) ... [2024-11-16 19:08:24,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df407e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:08:24, skipping insertion in model container [2024-11-16 19:08:24,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:08:24" (3/3) ... [2024-11-16 19:08:24,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2024-11-16 19:08:24,988 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:08:24,988 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:08:24,988 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:08:25,010 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:25,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 32 flow [2024-11-16 19:08:25,057 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-16 19:08:25,057 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:08:25,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 19 events. 2/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 4 conditions per place. [2024-11-16 19:08:25,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 14 transitions, 32 flow [2024-11-16 19:08:25,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 14 transitions, 32 flow [2024-11-16 19:08:25,072 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:25,078 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:25,078 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:08:25,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:25,087 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-11-16 19:08:25,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:08:25,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:25,088 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 19:08:25,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1512912147, now seen corresponding path program 1 times [2024-11-16 19:08:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073766161] [2024-11-16 19:08:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073766161] [2024-11-16 19:08:25,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073766161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:25,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:25,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127937507] [2024-11-16 19:08:25,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:25,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:25,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 14 [2024-11-16 19:08:25,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:25,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 14 [2024-11-16 19:08:25,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:25,392 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-11-16 19:08:25,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:08:25,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 20 events. 4/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 2 based on Foata normal form. 6/26 useless extension candidates. Maximal degree in co-relation 28. Up to 10 conditions per place. [2024-11-16 19:08:25,393 INFO L140 encePairwiseOnDemand]: 9/14 looper letters, 6 selfloop transitions, 2 changer transitions 0/11 dead transitions. [2024-11-16 19:08:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 11 transitions, 42 flow [2024-11-16 19:08:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 22 transitions. [2024-11-16 19:08:25,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-16 19:08:25,404 INFO L175 Difference]: Start difference. First operand has 16 places, 14 transitions, 32 flow. Second operand 3 states and 22 transitions. [2024-11-16 19:08:25,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 11 transitions, 42 flow [2024-11-16 19:08:25,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:25,407 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 28 flow [2024-11-16 19:08:25,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2024-11-16 19:08:25,411 INFO L277 CegarLoopForPetriNet]: 16 programPoint places, -1 predicate places. [2024-11-16 19:08:25,411 INFO L471 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 28 flow [2024-11-16 19:08:25,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,411 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-16 19:08:25,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:08:25,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 19:08:25,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash 344353086, now seen corresponding path program 1 times [2024-11-16 19:08:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269091107] [2024-11-16 19:08:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:08:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:08:25,455 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:08:25,456 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-16 19:08:25,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-16 19:08:25,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-16 19:08:25,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:08:25,458 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:08:25,460 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:08:25,460 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:08:25,477 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:25,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 52 flow [2024-11-16 19:08:25,486 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2024-11-16 19:08:25,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:08:25,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 31 events. 3/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2024-11-16 19:08:25,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 52 flow [2024-11-16 19:08:25,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 52 flow [2024-11-16 19:08:25,489 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:25,490 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:25,490 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:08:25,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:25,494 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-11-16 19:08:25,494 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:08:25,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,494 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:25,495 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-16 19:08:25,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -891653613, now seen corresponding path program 1 times [2024-11-16 19:08:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794025249] [2024-11-16 19:08:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:25,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794025249] [2024-11-16 19:08:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794025249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:25,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648991928] [2024-11-16 19:08:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:25,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:25,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-16 19:08:25,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:25,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-16 19:08:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:25,634 INFO L124 PetriNetUnfolderBase]: 72/151 cut-off events. [2024-11-16 19:08:25,634 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-16 19:08:25,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 151 events. 72/151 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 565 event pairs, 28 based on Foata normal form. 35/177 useless extension candidates. Maximal degree in co-relation 182. Up to 97 conditions per place. [2024-11-16 19:08:25,636 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-16 19:08:25,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 111 flow [2024-11-16 19:08:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-16 19:08:25,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-16 19:08:25,638 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 52 flow. Second operand 3 states and 40 transitions. [2024-11-16 19:08:25,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 111 flow [2024-11-16 19:08:25,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:25,639 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 67 flow [2024-11-16 19:08:25,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2024-11-16 19:08:25,640 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2024-11-16 19:08:25,641 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 67 flow [2024-11-16 19:08:25,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,642 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-11-16 19:08:25,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:08:25,642 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-16 19:08:25,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -134109488, now seen corresponding path program 1 times [2024-11-16 19:08:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379219715] [2024-11-16 19:08:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,656 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:08:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:08:25,669 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:08:25,669 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-16 19:08:25,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-16 19:08:25,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-16 19:08:25,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:08:25,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:08:25,671 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:08:25,672 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:08:25,672 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:08:25,684 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:25,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 28 transitions, 74 flow [2024-11-16 19:08:25,690 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-11-16 19:08:25,690 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:08:25,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 4/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 37. Up to 8 conditions per place. [2024-11-16 19:08:25,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 28 transitions, 74 flow [2024-11-16 19:08:25,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 28 transitions, 74 flow [2024-11-16 19:08:25,692 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:25,693 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:25,693 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:08:25,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:25,695 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2024-11-16 19:08:25,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:08:25,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:25,695 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:08:25,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash -63311079, now seen corresponding path program 1 times [2024-11-16 19:08:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262990576] [2024-11-16 19:08:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:25,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262990576] [2024-11-16 19:08:25,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262990576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:25,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:25,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128597180] [2024-11-16 19:08:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:25,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:25,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:08:25,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:25,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:08:25,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:25,932 INFO L124 PetriNetUnfolderBase]: 780/1233 cut-off events. [2024-11-16 19:08:25,932 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2024-11-16 19:08:25,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1233 events. 780/1233 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6249 event pairs, 268 based on Foata normal form. 214/1315 useless extension candidates. Maximal degree in co-relation 766. Up to 1019 conditions per place. [2024-11-16 19:08:25,956 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 28 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-16 19:08:25,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 168 flow [2024-11-16 19:08:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-11-16 19:08:25,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-16 19:08:25,958 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 3 states and 54 transitions. [2024-11-16 19:08:25,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 168 flow [2024-11-16 19:08:25,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 164 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:25,962 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 96 flow [2024-11-16 19:08:25,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-11-16 19:08:25,963 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-11-16 19:08:25,964 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 96 flow [2024-11-16 19:08:25,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:25,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:25,964 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-11-16 19:08:25,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:08:25,965 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-16 19:08:25,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1020281486, now seen corresponding path program 1 times [2024-11-16 19:08:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:25,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163455976] [2024-11-16 19:08:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:08:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:25,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:08:25,985 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:08:25,986 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-16 19:08:25,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-16 19:08:25,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-16 19:08:25,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-16 19:08:25,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-16 19:08:25,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:08:25,987 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:08:25,988 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:08:25,988 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:08:26,001 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:26,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 35 transitions, 98 flow [2024-11-16 19:08:26,012 INFO L124 PetriNetUnfolderBase]: 5/55 cut-off events. [2024-11-16 19:08:26,012 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:08:26,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 55 events. 5/55 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 54. Up to 10 conditions per place. [2024-11-16 19:08:26,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 35 transitions, 98 flow [2024-11-16 19:08:26,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 35 transitions, 98 flow [2024-11-16 19:08:26,016 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:26,018 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:26,018 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:08:26,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:26,021 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2024-11-16 19:08:26,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:08:26,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:26,022 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:26,022 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:08:26,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 972115839, now seen corresponding path program 1 times [2024-11-16 19:08:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:26,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872943059] [2024-11-16 19:08:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:26,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872943059] [2024-11-16 19:08:26,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872943059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:26,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:26,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579436371] [2024-11-16 19:08:26,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:26,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:26,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:26,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-11-16 19:08:26,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:26,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:26,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-11-16 19:08:26,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:26,741 INFO L124 PetriNetUnfolderBase]: 7078/9821 cut-off events. [2024-11-16 19:08:26,741 INFO L125 PetriNetUnfolderBase]: For 2055/2055 co-relation queries the response was YES. [2024-11-16 19:08:26,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20603 conditions, 9821 events. 7078/9821 cut-off events. For 2055/2055 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 55485 event pairs, 2414 based on Foata normal form. 1335/9797 useless extension candidates. Maximal degree in co-relation 2918. Up to 9019 conditions per place. [2024-11-16 19:08:26,796 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 37 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-16 19:08:26,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 229 flow [2024-11-16 19:08:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-16 19:08:26,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-11-16 19:08:26,799 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 98 flow. Second operand 3 states and 68 transitions. [2024-11-16 19:08:26,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 229 flow [2024-11-16 19:08:26,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 217 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:26,803 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 125 flow [2024-11-16 19:08:26,803 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-11-16 19:08:26,805 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-16 19:08:26,805 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 125 flow [2024-11-16 19:08:26,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:26,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:26,805 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:08:26,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:08:26,806 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:08:26,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -663749358, now seen corresponding path program 1 times [2024-11-16 19:08:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:26,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48274783] [2024-11-16 19:08:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:08:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:26,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48274783] [2024-11-16 19:08:26,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48274783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:26,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:26,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:08:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113841159] [2024-11-16 19:08:26,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:26,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:26,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-11-16 19:08:26,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:26,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:26,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-11-16 19:08:26,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:27,303 INFO L124 PetriNetUnfolderBase]: 4064/5665 cut-off events. [2024-11-16 19:08:27,304 INFO L125 PetriNetUnfolderBase]: For 1477/1477 co-relation queries the response was YES. [2024-11-16 19:08:27,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13223 conditions, 5665 events. 4064/5665 cut-off events. For 1477/1477 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28699 event pairs, 1321 based on Foata normal form. 888/6547 useless extension candidates. Maximal degree in co-relation 10430. Up to 5481 conditions per place. [2024-11-16 19:08:27,332 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-16 19:08:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 224 flow [2024-11-16 19:08:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-11-16 19:08:27,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-16 19:08:27,335 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 125 flow. Second operand 3 states and 56 transitions. [2024-11-16 19:08:27,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 224 flow [2024-11-16 19:08:27,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:08:27,339 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 132 flow [2024-11-16 19:08:27,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-16 19:08:27,340 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-11-16 19:08:27,340 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 132 flow [2024-11-16 19:08:27,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:27,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:27,341 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-11-16 19:08:27,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:08:27,341 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-16 19:08:27,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -607975941, now seen corresponding path program 1 times [2024-11-16 19:08:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640095260] [2024-11-16 19:08:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:27,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:08:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:27,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:08:27,364 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:08:27,364 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-16 19:08:27,364 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-16 19:08:27,364 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-16 19:08:27,364 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-16 19:08:27,364 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-16 19:08:27,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-16 19:08:27,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:08:27,365 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:08:27,365 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:08:27,365 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-16 19:08:27,381 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:27,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 124 flow [2024-11-16 19:08:27,387 INFO L124 PetriNetUnfolderBase]: 6/67 cut-off events. [2024-11-16 19:08:27,387 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-16 19:08:27,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 67 events. 6/67 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 72. Up to 12 conditions per place. [2024-11-16 19:08:27,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 124 flow [2024-11-16 19:08:27,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 42 transitions, 124 flow [2024-11-16 19:08:27,389 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:27,390 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:27,390 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-16 19:08:27,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:27,391 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-11-16 19:08:27,391 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:08:27,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:27,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:27,392 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-16 19:08:27,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2080340731, now seen corresponding path program 1 times [2024-11-16 19:08:27,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:27,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668399637] [2024-11-16 19:08:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:27,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:27,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668399637] [2024-11-16 19:08:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668399637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:27,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898831935] [2024-11-16 19:08:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:27,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:27,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-16 19:08:27,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:27,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:27,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-16 19:08:27,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:31,178 INFO L124 PetriNetUnfolderBase]: 58194/75071 cut-off events. [2024-11-16 19:08:31,178 INFO L125 PetriNetUnfolderBase]: For 19212/19212 co-relation queries the response was YES. [2024-11-16 19:08:31,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157686 conditions, 75071 events. 58194/75071 cut-off events. For 19212/19212 co-relation queries the response was YES. Maximal size of possible extension queue 3295. Compared 449219 event pairs, 20746 based on Foata normal form. 8330/71599 useless extension candidates. Maximal degree in co-relation 20809. Up to 72181 conditions per place. [2024-11-16 19:08:31,574 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 46 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2024-11-16 19:08:31,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 294 flow [2024-11-16 19:08:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-11-16 19:08:31,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-16 19:08:31,576 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 124 flow. Second operand 3 states and 82 transitions. [2024-11-16 19:08:31,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 294 flow [2024-11-16 19:08:31,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 270 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-11-16 19:08:31,591 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 154 flow [2024-11-16 19:08:31,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-11-16 19:08:31,592 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-16 19:08:31,593 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 154 flow [2024-11-16 19:08:31,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:31,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:31,593 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:08:31,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:08:31,593 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-16 19:08:31,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2029187554, now seen corresponding path program 1 times [2024-11-16 19:08:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872658708] [2024-11-16 19:08:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:08:31,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:31,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872658708] [2024-11-16 19:08:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872658708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:31,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:31,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:08:31,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519799243] [2024-11-16 19:08:31,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:31,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:31,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:31,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-16 19:08:31,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:31,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:31,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-16 19:08:31,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:08:33,350 INFO L124 PetriNetUnfolderBase]: 26564/34455 cut-off events. [2024-11-16 19:08:33,351 INFO L125 PetriNetUnfolderBase]: For 9650/9650 co-relation queries the response was YES. [2024-11-16 19:08:33,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79699 conditions, 34455 events. 26564/34455 cut-off events. For 9650/9650 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 185574 event pairs, 10055 based on Foata normal form. 6328/40760 useless extension candidates. Maximal degree in co-relation 63290. Up to 34023 conditions per place. [2024-11-16 19:08:33,509 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 42 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-16 19:08:33,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 278 flow [2024-11-16 19:08:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:08:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:08:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-16 19:08:33,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-11-16 19:08:33,512 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 154 flow. Second operand 3 states and 68 transitions. [2024-11-16 19:08:33,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 278 flow [2024-11-16 19:08:33,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:08:33,518 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 163 flow [2024-11-16 19:08:33,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-16 19:08:33,519 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-16 19:08:33,520 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 163 flow [2024-11-16 19:08:33,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:33,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:33,520 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:08:33,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-16 19:08:33,520 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-16 19:08:33,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash 134255802, now seen corresponding path program 1 times [2024-11-16 19:08:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137934019] [2024-11-16 19:08:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:33,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:33,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:08:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:08:33,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:08:33,540 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:08:33,540 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-16 19:08:33,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-16 19:08:33,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-16 19:08:33,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-16 19:08:33,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-16 19:08:33,541 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-16 19:08:33,541 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-16 19:08:33,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-16 19:08:33,541 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:08:33,542 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:08:33,542 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-16 19:08:33,562 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:08:33,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 49 transitions, 152 flow [2024-11-16 19:08:33,569 INFO L124 PetriNetUnfolderBase]: 7/79 cut-off events. [2024-11-16 19:08:33,569 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-16 19:08:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 79 events. 7/79 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 175 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 91. Up to 14 conditions per place. [2024-11-16 19:08:33,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 49 transitions, 152 flow [2024-11-16 19:08:33,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 49 transitions, 152 flow [2024-11-16 19:08:33,571 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:08:33,571 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;@f4b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:08:33,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-16 19:08:33,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:08:33,573 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-11-16 19:08:33,573 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:08:33,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:08:33,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-16 19:08:33,573 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-11-16 19:08:33,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:08:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -630745621, now seen corresponding path program 1 times [2024-11-16 19:08:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:08:33,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475726279] [2024-11-16 19:08:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:08:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:08:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:08:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:08:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:08:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475726279] [2024-11-16 19:08:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475726279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:08:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:08:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-16 19:08:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607248423] [2024-11-16 19:08:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:08:33,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:08:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:08:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:08:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:08:33,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 49 [2024-11-16 19:08:33,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:08:33,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:08:33,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 49 [2024-11-16 19:08:33,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand