./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/48_ticket_lock_low_contention_vs-pthread.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 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:22:02,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:22:02,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:22:02,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:22:02,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:22:02,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:22:02,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:22:02,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:22:02,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:22:02,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:22:02,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:22:02,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:22:02,477 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:22:02,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:22:02,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:22:02,478 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 [2025-03-17 06:22:02,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:22:02,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:22:02,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:22:02,728 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:22:02,728 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:22:02,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2025-03-17 06:22:03,897 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1a280c2/5255003afb0447dfafd71bab8f36d99d/FLAG78656666c [2025-03-17 06:22:04,204 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:22:04,205 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2025-03-17 06:22:04,220 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1a280c2/5255003afb0447dfafd71bab8f36d99d/FLAG78656666c [2025-03-17 06:22:04,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1a280c2/5255003afb0447dfafd71bab8f36d99d [2025-03-17 06:22:04,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:22:04,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:22:04,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:22:04,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:22:04,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:22:04,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc827a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04, skipping insertion in model container [2025-03-17 06:22:04,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,513 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:22:04,768 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2025-03-17 06:22:04,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:22:04,791 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:22:04,832 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2025-03-17 06:22:04,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:22:04,866 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:22:04,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04 WrapperNode [2025-03-17 06:22:04,868 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:22:04,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:22:04,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:22:04,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:22:04,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,904 INFO L138 Inliner]: procedures = 164, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2025-03-17 06:22:04,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:22:04,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:22:04,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:22:04,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:22:04,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,912 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,921 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2025-03-17 06:22:04,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,927 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,928 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:22:04,933 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:22:04,933 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:22:04,933 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:22:04,934 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (1/1) ... [2025-03-17 06:22:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:22:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:22:04,959 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) [2025-03-17 06:22:04,962 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 [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-17 06:22:04,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 06:22:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:22:04,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:22:04,980 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:22:05,066 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:22:05,068 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:22:05,195 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:22:05,196 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:22:05,266 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:22:05,266 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:22:05,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:22:05 BoogieIcfgContainer [2025-03-17 06:22:05,266 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:22:05,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:22:05,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:22:05,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:22:05,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:22:04" (1/3) ... [2025-03-17 06:22:05,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e838b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:22:05, skipping insertion in model container [2025-03-17 06:22:05,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:22:04" (2/3) ... [2025-03-17 06:22:05,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e838b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:22:05, skipping insertion in model container [2025-03-17 06:22:05,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:22:05" (3/3) ... [2025-03-17 06:22:05,276 INFO L128 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2025-03-17 06:22:05,289 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:22:05,290 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 48_ticket_lock_low_contention_vs-pthread.i that has 2 procedures, 24 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2025-03-17 06:22:05,290 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:22:05,324 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:22:05,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 27 transitions, 58 flow [2025-03-17 06:22:05,390 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2025-03-17 06:22:05,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:22:05,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2025-03-17 06:22:05,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 27 transitions, 58 flow [2025-03-17 06:22:05,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 27 transitions, 58 flow [2025-03-17 06:22:05,402 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:22:05,412 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;@17e73efc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:22:05,412 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:22:05,422 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:22:05,423 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-03-17 06:22:05,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:22:05,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:05,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:05,424 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:22:05,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash -967834820, now seen corresponding path program 1 times [2025-03-17 06:22:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230579503] [2025-03-17 06:22:05,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:05,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:05,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:05,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:05,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:05,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:05,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230579503] [2025-03-17 06:22:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230579503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:22:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367809064] [2025-03-17 06:22:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:05,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:22:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:05,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:22:05,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:22:05,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2025-03-17 06:22:05,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 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) [2025-03-17 06:22:05,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:05,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2025-03-17 06:22:05,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:05,654 INFO L124 PetriNetUnfolderBase]: 32/133 cut-off events. [2025-03-17 06:22:05,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:22:05,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 133 events. 32/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 564 event pairs, 32 based on Foata normal form. 14/127 useless extension candidates. Maximal degree in co-relation 193. Up to 87 conditions per place. [2025-03-17 06:22:05,659 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 14 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2025-03-17 06:22:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 80 flow [2025-03-17 06:22:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:22:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:22:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2025-03-17 06:22:05,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2025-03-17 06:22:05,669 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 2 states and 37 transitions. [2025-03-17 06:22:05,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 80 flow [2025-03-17 06:22:05,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:05,676 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 52 flow [2025-03-17 06:22:05,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2025-03-17 06:22:05,680 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2025-03-17 06:22:05,680 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 52 flow [2025-03-17 06:22:05,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 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) [2025-03-17 06:22:05,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:05,681 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-03-17 06:22:05,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:22:05,681 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:22:05,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash -959510951, now seen corresponding path program 1 times [2025-03-17 06:22:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:05,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674786910] [2025-03-17 06:22:05,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:05,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:05,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:05,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:05,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:05,707 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:22:05,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:05,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:05,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:05,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:05,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:22:05,757 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:22:05,758 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-03-17 06:22:05,759 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-03-17 06:22:05,759 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-03-17 06:22:05,759 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-17 06:22:05,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:22:05,760 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-17 06:22:05,762 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:22:05,762 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-17 06:22:05,778 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:22:05,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 86 flow [2025-03-17 06:22:05,795 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2025-03-17 06:22:05,796 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:22:05,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 8/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 210 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2025-03-17 06:22:05,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 86 flow [2025-03-17 06:22:05,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 86 flow [2025-03-17 06:22:05,801 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:22:05,801 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;@17e73efc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:22:05,801 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-17 06:22:05,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:22:05,806 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-03-17 06:22:05,806 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:22:05,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:05,806 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:05,806 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:22:05,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -478261982, now seen corresponding path program 1 times [2025-03-17 06:22:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189392312] [2025-03-17 06:22:05,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:05,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:05,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:05,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:05,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:05,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:05,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189392312] [2025-03-17 06:22:05,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189392312] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:05,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:05,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:22:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840074230] [2025-03-17 06:22:05,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:05,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:22:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:05,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:22:05,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:22:05,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2025-03-17 06:22:05,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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) [2025-03-17 06:22:05,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:05,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2025-03-17 06:22:05,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:05,985 INFO L124 PetriNetUnfolderBase]: 372/910 cut-off events. [2025-03-17 06:22:05,986 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-17 06:22:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 910 events. 372/910 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5900 event pairs, 372 based on Foata normal form. 123/905 useless extension candidates. Maximal degree in co-relation 1047. Up to 652 conditions per place. [2025-03-17 06:22:05,995 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 19 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2025-03-17 06:22:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 116 flow [2025-03-17 06:22:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:22:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:22:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 53 transitions. [2025-03-17 06:22:05,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6973684210526315 [2025-03-17 06:22:05,998 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 86 flow. Second operand 2 states and 53 transitions. [2025-03-17 06:22:05,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 116 flow [2025-03-17 06:22:05,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:06,000 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 78 flow [2025-03-17 06:22:06,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2025-03-17 06:22:06,001 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2025-03-17 06:22:06,001 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 78 flow [2025-03-17 06:22:06,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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) [2025-03-17 06:22:06,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:06,002 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:06,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:22:06,002 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:22:06,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1665959040, now seen corresponding path program 1 times [2025-03-17 06:22:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:06,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374184291] [2025-03-17 06:22:06,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:06,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 06:22:06,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 06:22:06,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:06,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:06,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374184291] [2025-03-17 06:22:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374184291] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:06,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:22:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474565317] [2025-03-17 06:22:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:06,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:22:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:06,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:22:06,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:22:06,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2025-03-17 06:22:06,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:22:06,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:06,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2025-03-17 06:22:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:06,328 INFO L124 PetriNetUnfolderBase]: 967/1933 cut-off events. [2025-03-17 06:22:06,329 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-17 06:22:06,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1933 events. 967/1933 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12538 event pairs, 612 based on Foata normal form. 191/2066 useless extension candidates. Maximal degree in co-relation 3590. Up to 1239 conditions per place. [2025-03-17 06:22:06,341 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 39 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2025-03-17 06:22:06,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 213 flow [2025-03-17 06:22:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:22:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:22:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2025-03-17 06:22:06,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2025-03-17 06:22:06,342 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 78 flow. Second operand 3 states and 75 transitions. [2025-03-17 06:22:06,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 213 flow [2025-03-17 06:22:06,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:06,345 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 132 flow [2025-03-17 06:22:06,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, 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=44, PETRI_TRANSITIONS=40} [2025-03-17 06:22:06,348 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2025-03-17 06:22:06,348 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 132 flow [2025-03-17 06:22:06,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:22:06,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:06,349 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2025-03-17 06:22:06,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:22:06,349 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:22:06,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1952695612, now seen corresponding path program 1 times [2025-03-17 06:22:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310477421] [2025-03-17 06:22:06,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:06,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 06:22:06,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 06:22:06,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:06,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:06,371 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:22:06,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 06:22:06,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 06:22:06,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:06,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:06,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:22:06,396 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:22:06,396 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-03-17 06:22:06,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-03-17 06:22:06,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-03-17 06:22:06,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-03-17 06:22:06,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-03-17 06:22:06,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:22:06,397 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-03-17 06:22:06,398 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:22:06,398 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-17 06:22:06,415 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:22:06,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 116 flow [2025-03-17 06:22:06,422 INFO L124 PetriNetUnfolderBase]: 11/91 cut-off events. [2025-03-17 06:22:06,423 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-17 06:22:06,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 11/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 329 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 72. Up to 8 conditions per place. [2025-03-17 06:22:06,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 116 flow [2025-03-17 06:22:06,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 49 transitions, 116 flow [2025-03-17 06:22:06,425 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:22:06,425 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;@17e73efc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:22:06,425 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-17 06:22:06,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:22:06,427 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-03-17 06:22:06,427 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:22:06,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:06,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:06,427 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-03-17 06:22:06,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1509334771, now seen corresponding path program 1 times [2025-03-17 06:22:06,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476136102] [2025-03-17 06:22:06,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:06,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:06,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:06,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:06,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:06,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476136102] [2025-03-17 06:22:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476136102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:06,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:22:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436527026] [2025-03-17 06:22:06,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:06,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:22:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:06,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:22:06,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:22:06,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2025-03-17 06:22:06,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2025-03-17 06:22:06,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:06,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2025-03-17 06:22:06,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:06,871 INFO L124 PetriNetUnfolderBase]: 2972/5695 cut-off events. [2025-03-17 06:22:06,871 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2025-03-17 06:22:06,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 5695 events. 2972/5695 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 43918 event pairs, 2972 based on Foata normal form. 915/5954 useless extension candidates. Maximal degree in co-relation 2405. Up to 4377 conditions per place. [2025-03-17 06:22:06,908 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 24 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2025-03-17 06:22:06,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 154 flow [2025-03-17 06:22:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:22:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:22:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2025-03-17 06:22:06,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2025-03-17 06:22:06,912 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 116 flow. Second operand 2 states and 69 transitions. [2025-03-17 06:22:06,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 154 flow [2025-03-17 06:22:06,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 152 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:06,914 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 104 flow [2025-03-17 06:22:06,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2025-03-17 06:22:06,915 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2025-03-17 06:22:06,916 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 104 flow [2025-03-17 06:22:06,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2025-03-17 06:22:06,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:06,916 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:06,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:22:06,916 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-03-17 06:22:06,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -180001792, now seen corresponding path program 1 times [2025-03-17 06:22:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140700629] [2025-03-17 06:22:06,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:06,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:06,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 06:22:06,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 06:22:06,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:06,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:06,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:06,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140700629] [2025-03-17 06:22:06,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140700629] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:06,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:06,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:22:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739900473] [2025-03-17 06:22:06,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:06,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:22:06,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:06,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:22:06,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:22:07,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2025-03-17 06:22:07,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2025-03-17 06:22:07,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:07,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2025-03-17 06:22:07,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:08,251 INFO L124 PetriNetUnfolderBase]: 12179/20345 cut-off events. [2025-03-17 06:22:08,251 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-03-17 06:22:08,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38104 conditions, 20345 events. 12179/20345 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 162553 event pairs, 7347 based on Foata normal form. 1919/21798 useless extension candidates. Maximal degree in co-relation 38098. Up to 12688 conditions per place. [2025-03-17 06:22:08,359 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 50 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2025-03-17 06:22:08,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 282 flow [2025-03-17 06:22:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:22:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:22:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2025-03-17 06:22:08,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 06:22:08,363 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 104 flow. Second operand 3 states and 98 transitions. [2025-03-17 06:22:08,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 282 flow [2025-03-17 06:22:08,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:08,365 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 176 flow [2025-03-17 06:22:08,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2025-03-17 06:22:08,365 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2025-03-17 06:22:08,365 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 176 flow [2025-03-17 06:22:08,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2025-03-17 06:22:08,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:08,366 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2025-03-17 06:22:08,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:22:08,366 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-03-17 06:22:08,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:08,366 INFO L85 PathProgramCache]: Analyzing trace with hash 501194287, now seen corresponding path program 1 times [2025-03-17 06:22:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:08,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791517567] [2025-03-17 06:22:08,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:08,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 06:22:08,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 06:22:08,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:08,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:08,382 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:22:08,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 06:22:08,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 06:22:08,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:08,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:08,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:22:08,390 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:22:08,390 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-17 06:22:08,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-03-17 06:22:08,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-17 06:22:08,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-17 06:22:08,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-17 06:22:08,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-17 06:22:08,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:22:08,391 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-03-17 06:22:08,391 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:22:08,391 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-03-17 06:22:08,414 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:22:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 60 transitions, 148 flow [2025-03-17 06:22:08,421 INFO L124 PetriNetUnfolderBase]: 14/116 cut-off events. [2025-03-17 06:22:08,421 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-17 06:22:08,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 116 events. 14/116 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 437 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2025-03-17 06:22:08,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 60 transitions, 148 flow [2025-03-17 06:22:08,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 148 flow [2025-03-17 06:22:08,423 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:22:08,424 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;@17e73efc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:22:08,424 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-17 06:22:08,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:22:08,425 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-03-17 06:22:08,425 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:22:08,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:08,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:08,426 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:22:08,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash 699988143, now seen corresponding path program 1 times [2025-03-17 06:22:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:08,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412137681] [2025-03-17 06:22:08,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:08,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:08,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:08,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:08,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:08,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:08,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412137681] [2025-03-17 06:22:08,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412137681] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:08,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:08,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:22:08,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938309155] [2025-03-17 06:22:08,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:08,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:22:08,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:08,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:22:08,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:22:08,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-03-17 06:22:08,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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) [2025-03-17 06:22:08,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:08,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-03-17 06:22:08,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:10,394 INFO L124 PetriNetUnfolderBase]: 20472/34284 cut-off events. [2025-03-17 06:22:10,394 INFO L125 PetriNetUnfolderBase]: For 1815/1815 co-relation queries the response was YES. [2025-03-17 06:22:10,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62533 conditions, 34284 events. 20472/34284 cut-off events. For 1815/1815 co-relation queries the response was YES. Maximal size of possible extension queue 1478. Compared 295918 event pairs, 20472 based on Foata normal form. 6040/37032 useless extension candidates. Maximal degree in co-relation 10265. Up to 27502 conditions per place. [2025-03-17 06:22:10,582 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2025-03-17 06:22:10,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 194 flow [2025-03-17 06:22:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:22:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:22:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 85 transitions. [2025-03-17 06:22:10,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-03-17 06:22:10,583 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 148 flow. Second operand 2 states and 85 transitions. [2025-03-17 06:22:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 194 flow [2025-03-17 06:22:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 188 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:10,586 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 130 flow [2025-03-17 06:22:10,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2025-03-17 06:22:10,587 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2025-03-17 06:22:10,587 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 130 flow [2025-03-17 06:22:10,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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) [2025-03-17 06:22:10,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:10,587 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:10,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:22:10,588 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:22:10,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 500056576, now seen corresponding path program 1 times [2025-03-17 06:22:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:10,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344092808] [2025-03-17 06:22:10,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:10,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 06:22:10,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 06:22:10,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:10,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:10,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:10,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344092808] [2025-03-17 06:22:10,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344092808] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:10,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:10,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:22:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47279254] [2025-03-17 06:22:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:10,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:22:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:10,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:22:10,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:22:10,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2025-03-17 06:22:10,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2025-03-17 06:22:10,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:10,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2025-03-17 06:22:10,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:19,845 INFO L124 PetriNetUnfolderBase]: 129035/194871 cut-off events. [2025-03-17 06:22:19,846 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2025-03-17 06:22:20,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367575 conditions, 194871 events. 129035/194871 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 7233. Compared 1741885 event pairs, 75131 based on Foata normal form. 17945/209104 useless extension candidates. Maximal degree in co-relation 367568. Up to 118406 conditions per place. [2025-03-17 06:22:21,238 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 61 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2025-03-17 06:22:21,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 351 flow [2025-03-17 06:22:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:22:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:22:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2025-03-17 06:22:21,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2025-03-17 06:22:21,240 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 130 flow. Second operand 3 states and 121 transitions. [2025-03-17 06:22:21,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 351 flow [2025-03-17 06:22:21,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 351 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:21,247 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 220 flow [2025-03-17 06:22:21,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2025-03-17 06:22:21,247 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2025-03-17 06:22:21,247 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 220 flow [2025-03-17 06:22:21,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2025-03-17 06:22:21,248 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:21,248 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:21,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:22:21,248 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:22:21,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash -134119313, now seen corresponding path program 1 times [2025-03-17 06:22:21,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44236849] [2025-03-17 06:22:21,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:21,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 06:22:21,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 06:22:21,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:21,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:21,259 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:22:21,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 06:22:21,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 06:22:21,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:21,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:22:21,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:22:21,279 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-03-17 06:22:21,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-03-17 06:22:21,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 06:22:21,279 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-03-17 06:22:21,280 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:22:21,280 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-03-17 06:22:21,303 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:22:21,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 71 transitions, 182 flow [2025-03-17 06:22:21,313 INFO L124 PetriNetUnfolderBase]: 17/141 cut-off events. [2025-03-17 06:22:21,313 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-17 06:22:21,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 141 events. 17/141 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 556 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2025-03-17 06:22:21,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 71 transitions, 182 flow [2025-03-17 06:22:21,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 71 transitions, 182 flow [2025-03-17 06:22:21,316 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:22:21,317 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;@17e73efc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:22:21,317 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 06:22:21,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:22:21,320 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-03-17 06:22:21,320 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:22:21,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:21,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:21,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 06:22:21,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1388665430, now seen corresponding path program 1 times [2025-03-17 06:22:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:21,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385739632] [2025-03-17 06:22:21,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:21,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:22:21,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:22:21,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:21,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385739632] [2025-03-17 06:22:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385739632] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:21,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:21,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:22:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401211014] [2025-03-17 06:22:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:21,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:22:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:21,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:22:21,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:22:21,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 71 [2025-03-17 06:22:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:22:21,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:21,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 71 [2025-03-17 06:22:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:22:32,196 INFO L124 PetriNetUnfolderBase]: 130472/199729 cut-off events. [2025-03-17 06:22:32,196 INFO L125 PetriNetUnfolderBase]: For 14310/14310 co-relation queries the response was YES. [2025-03-17 06:22:32,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369854 conditions, 199729 events. 130472/199729 cut-off events. For 14310/14310 co-relation queries the response was YES. Maximal size of possible extension queue 7107. Compared 1842840 event pairs, 130472 based on Foata normal form. 37290/220547 useless extension candidates. Maximal degree in co-relation 62729. Up to 165627 conditions per place. [2025-03-17 06:22:33,492 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 34 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2025-03-17 06:22:33,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 236 flow [2025-03-17 06:22:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:22:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:22:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2025-03-17 06:22:33,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7112676056338029 [2025-03-17 06:22:33,497 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 182 flow. Second operand 2 states and 101 transitions. [2025-03-17 06:22:33,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 236 flow [2025-03-17 06:22:33,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 224 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-03-17 06:22:33,507 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 156 flow [2025-03-17 06:22:33,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2025-03-17 06:22:33,508 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2025-03-17 06:22:33,510 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 156 flow [2025-03-17 06:22:33,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:22:33,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:22:33,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:22:33,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 06:22:33,511 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 06:22:33,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:22:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 374216064, now seen corresponding path program 1 times [2025-03-17 06:22:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:22:33,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719003629] [2025-03-17 06:22:33,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:22:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:22:33,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 06:22:33,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 06:22:33,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:22:33,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:22:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:22:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:22:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719003629] [2025-03-17 06:22:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719003629] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:22:33,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:22:33,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:22:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333165491] [2025-03-17 06:22:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:22:33,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:22:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:22:33,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:22:33,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:22:33,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 71 [2025-03-17 06:22:33,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2025-03-17 06:22:33,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:22:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 71 [2025-03-17 06:22:33,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand