./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.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/triangular-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:19:34,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:19:34,638 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:19:34,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:19:34,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:19:34,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:19:34,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:19:34,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:19:34,667 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:19:34,667 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:19:34,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:19:34,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:19:34,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:19:34,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:19:34,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:19:34,669 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:19:34,672 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:34,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:19:34,672 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:19:34,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:19:34,673 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 -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2025-03-17 06:19:34,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:19:34,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:19:34,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:19:34,902 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:19:34,902 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:19:34,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2025-03-17 06:19:36,126 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643757bb9/818920295cf143a6b18bc1541e1ec099/FLAG99cb8a8fb [2025-03-17 06:19:36,456 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:19:36,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2025-03-17 06:19:36,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643757bb9/818920295cf143a6b18bc1541e1ec099/FLAG99cb8a8fb [2025-03-17 06:19:36,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643757bb9/818920295cf143a6b18bc1541e1ec099 [2025-03-17 06:19:36,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:19:36,491 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:19:36,493 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:36,493 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:19:36,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:19:36,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cd8bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36, skipping insertion in model container [2025-03-17 06:19:36,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,528 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:19:36,785 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/triangular-1.i[30950,30963] [2025-03-17 06:19:36,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:36,798 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:19:36,831 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/triangular-1.i[30950,30963] [2025-03-17 06:19:36,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:36,860 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:19:36,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36 WrapperNode [2025-03-17 06:19:36,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:36,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:36,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:19:36,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:19:36,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,888 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,902 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-17 06:19:36,903 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:36,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:19:36,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:19:36,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:19:36,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,935 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 06:19:36,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,941 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,943 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,944 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:19:36,945 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:19:36,945 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:19:36,945 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:19:36,946 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (1/1) ... [2025-03-17 06:19:36,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:36,985 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 06:19:36,988 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 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 06:19:37,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 06:19:37,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:19:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:19:37,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:19:37,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:19:37,006 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 06:19:37,135 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:19:37,137 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:19:37,264 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:19:37,264 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:19:37,328 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:19:37,328 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:19:37,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:37 BoogieIcfgContainer [2025-03-17 06:19:37,328 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:19:37,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:19:37,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:19:37,333 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:19:37,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:19:36" (1/3) ... [2025-03-17 06:19:37,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402c00ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:37, skipping insertion in model container [2025-03-17 06:19:37,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:36" (2/3) ... [2025-03-17 06:19:37,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402c00ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:37, skipping insertion in model container [2025-03-17 06:19:37,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:37" (3/3) ... [2025-03-17 06:19:37,335 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2025-03-17 06:19:37,348 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:19:37,349 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG triangular-1.i that has 3 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-17 06:19:37,349 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:19:37,390 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:19:37,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2025-03-17 06:19:37,442 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-17 06:19:37,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:19:37,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-03-17 06:19:37,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2025-03-17 06:19:37,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2025-03-17 06:19:37,468 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:19:37,484 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;@530c8099, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:19:37,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:19:37,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:19:37,497 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-17 06:19:37,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:19:37,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:37,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:37,498 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:37,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:37,507 INFO L85 PathProgramCache]: Analyzing trace with hash 355335699, now seen corresponding path program 1 times [2025-03-17 06:19:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:37,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737308787] [2025-03-17 06:19:37,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:37,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 06:19:37,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 06:19:37,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:37,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:37,852 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 06:19:37,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:37,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737308787] [2025-03-17 06:19:37,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737308787] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:37,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:37,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:19:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657397000] [2025-03-17 06:19:37,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:37,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:19:37,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:37,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:19:37,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:19:37,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:37,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 06:19:37,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:37,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:37,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:38,148 INFO L124 PetriNetUnfolderBase]: 321/540 cut-off events. [2025-03-17 06:19:38,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:19:38,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 540 events. 321/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2120 event pairs, 62 based on Foata normal form. 12/535 useless extension candidates. Maximal degree in co-relation 1042. Up to 221 conditions per place. [2025-03-17 06:19:38,153 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2025-03-17 06:19:38,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2025-03-17 06:19:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:19:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:19:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2025-03-17 06:19:38,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 06:19:38,165 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2025-03-17 06:19:38,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2025-03-17 06:19:38,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:38,173 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2025-03-17 06:19:38,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2025-03-17 06:19:38,178 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-03-17 06:19:38,179 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2025-03-17 06:19:38,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 06:19:38,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:38,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:38,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:19:38,180 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:38,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash 964778290, now seen corresponding path program 1 times [2025-03-17 06:19:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962198504] [2025-03-17 06:19:38,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:38,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 06:19:38,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 06:19:38,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:38,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:38,331 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 06:19:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:38,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962198504] [2025-03-17 06:19:38,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962198504] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:38,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:38,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:19:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339174076] [2025-03-17 06:19:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:38,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:19:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:38,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:19:38,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:19:38,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:38,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:38,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:38,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:38,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:38,580 INFO L124 PetriNetUnfolderBase]: 382/687 cut-off events. [2025-03-17 06:19:38,580 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2025-03-17 06:19:38,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 687 events. 382/687 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2905 event pairs, 65 based on Foata normal form. 27/710 useless extension candidates. Maximal degree in co-relation 1570. Up to 246 conditions per place. [2025-03-17 06:19:38,586 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2025-03-17 06:19:38,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2025-03-17 06:19:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:19:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:19:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2025-03-17 06:19:38,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 06:19:38,588 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2025-03-17 06:19:38,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2025-03-17 06:19:38,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:38,591 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2025-03-17 06:19:38,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2025-03-17 06:19:38,591 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2025-03-17 06:19:38,591 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2025-03-17 06:19:38,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:38,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:38,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:38,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:19:38,592 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:38,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1319887630, now seen corresponding path program 2 times [2025-03-17 06:19:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:38,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109407212] [2025-03-17 06:19:38,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:38,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:38,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 1 equivalence classes. [2025-03-17 06:19:38,612 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 06:19:38,612 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:38,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:38,709 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 06:19:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109407212] [2025-03-17 06:19:38,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109407212] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:38,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:38,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:19:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133004561] [2025-03-17 06:19:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:38,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:19:38,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:38,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:19:38,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:19:38,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:38,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:38,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:38,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:38,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:38,902 INFO L124 PetriNetUnfolderBase]: 328/603 cut-off events. [2025-03-17 06:19:38,902 INFO L125 PetriNetUnfolderBase]: For 971/971 co-relation queries the response was YES. [2025-03-17 06:19:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 603 events. 328/603 cut-off events. For 971/971 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2509 event pairs, 65 based on Foata normal form. 45/644 useless extension candidates. Maximal degree in co-relation 1711. Up to 234 conditions per place. [2025-03-17 06:19:38,909 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2025-03-17 06:19:38,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2025-03-17 06:19:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:19:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:19:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-17 06:19:38,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2025-03-17 06:19:38,912 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2025-03-17 06:19:38,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2025-03-17 06:19:38,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:38,918 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2025-03-17 06:19:38,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-03-17 06:19:38,919 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2025-03-17 06:19:38,919 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2025-03-17 06:19:38,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:38,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:38,919 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:38,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:19:38,919 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:38,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -443489336, now seen corresponding path program 1 times [2025-03-17 06:19:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957397614] [2025-03-17 06:19:38,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:38,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:19:38,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:19:38,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:38,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:39,069 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 06:19:39,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957397614] [2025-03-17 06:19:39,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957397614] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:39,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:39,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:19:39,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411652019] [2025-03-17 06:19:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:39,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:19:39,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:39,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:19:39,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:19:39,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:39,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:39,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:39,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:39,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:39,294 INFO L124 PetriNetUnfolderBase]: 337/612 cut-off events. [2025-03-17 06:19:39,294 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2025-03-17 06:19:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 612 events. 337/612 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2541 event pairs, 74 based on Foata normal form. 18/626 useless extension candidates. Maximal degree in co-relation 1911. Up to 237 conditions per place. [2025-03-17 06:19:39,298 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2025-03-17 06:19:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2025-03-17 06:19:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:19:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:19:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2025-03-17 06:19:39,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2025-03-17 06:19:39,299 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2025-03-17 06:19:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2025-03-17 06:19:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-03-17 06:19:39,308 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2025-03-17 06:19:39,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2025-03-17 06:19:39,308 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2025-03-17 06:19:39,308 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2025-03-17 06:19:39,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:39,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:39,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:39,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:19:39,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:39,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1513461300, now seen corresponding path program 2 times [2025-03-17 06:19:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:39,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403700891] [2025-03-17 06:19:39,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:39,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:39,314 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:19:39,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:19:39,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:39,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:39,407 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 06:19:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403700891] [2025-03-17 06:19:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403700891] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:39,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:19:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630937135] [2025-03-17 06:19:39,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:39,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:19:39,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:39,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:19:39,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:19:39,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:39,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:39,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:39,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:39,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:39,608 INFO L124 PetriNetUnfolderBase]: 409/742 cut-off events. [2025-03-17 06:19:39,608 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2025-03-17 06:19:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 742 events. 409/742 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3153 event pairs, 71 based on Foata normal form. 27/764 useless extension candidates. Maximal degree in co-relation 2412. Up to 220 conditions per place. [2025-03-17 06:19:39,611 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 43 selfloop transitions, 18 changer transitions 28/92 dead transitions. [2025-03-17 06:19:39,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 685 flow [2025-03-17 06:19:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:19:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:19:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2025-03-17 06:19:39,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-03-17 06:19:39,613 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 10 states and 125 transitions. [2025-03-17 06:19:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 685 flow [2025-03-17 06:19:39,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 633 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-03-17 06:19:39,618 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 347 flow [2025-03-17 06:19:39,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2025-03-17 06:19:39,618 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-03-17 06:19:39,618 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 347 flow [2025-03-17 06:19:39,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:39,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:39,619 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:39,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:19:39,619 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:39,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1437571864, now seen corresponding path program 1 times [2025-03-17 06:19:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126435571] [2025-03-17 06:19:39,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:39,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:39,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:39,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:39,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:39,709 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 06:19:39,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126435571] [2025-03-17 06:19:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126435571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662088377] [2025-03-17 06:19:39,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:39,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:39,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:39,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:39,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:39,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:39,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:39,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:39,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:39,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:39,901 INFO L124 PetriNetUnfolderBase]: 436/793 cut-off events. [2025-03-17 06:19:39,901 INFO L125 PetriNetUnfolderBase]: For 3583/3583 co-relation queries the response was YES. [2025-03-17 06:19:39,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 793 events. 436/793 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3439 event pairs, 59 based on Foata normal form. 18/806 useless extension candidates. Maximal degree in co-relation 2878. Up to 154 conditions per place. [2025-03-17 06:19:39,916 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 44 selfloop transitions, 24 changer transitions 23/94 dead transitions. [2025-03-17 06:19:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 795 flow [2025-03-17 06:19:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:19:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:19:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2025-03-17 06:19:39,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-03-17 06:19:39,918 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 347 flow. Second operand 10 states and 125 transitions. [2025-03-17 06:19:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 795 flow [2025-03-17 06:19:39,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 751 flow, removed 14 selfloop flow, removed 5 redundant places. [2025-03-17 06:19:39,927 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 435 flow [2025-03-17 06:19:39,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=435, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2025-03-17 06:19:39,928 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2025-03-17 06:19:39,928 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 435 flow [2025-03-17 06:19:39,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:39,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:39,928 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:39,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:19:39,928 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:39,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -245987901, now seen corresponding path program 1 times [2025-03-17 06:19:39,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:39,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321786432] [2025-03-17 06:19:39,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:39,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:39,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:39,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:39,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:40,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321786432] [2025-03-17 06:19:40,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321786432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:40,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642642886] [2025-03-17 06:19:40,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:40,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:40,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:40,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:19:40,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:40,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:40,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:40,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:40,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 06:19:40,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:40,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:40,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642642886] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:40,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:40,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-17 06:19:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266795055] [2025-03-17 06:19:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:40,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 06:19:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:40,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 06:19:40,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:19:40,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:40,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 435 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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 06:19:40,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:40,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:40,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:40,813 INFO L124 PetriNetUnfolderBase]: 580/1068 cut-off events. [2025-03-17 06:19:40,814 INFO L125 PetriNetUnfolderBase]: For 8203/8203 co-relation queries the response was YES. [2025-03-17 06:19:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 1068 events. 580/1068 cut-off events. For 8203/8203 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4469 event pairs, 149 based on Foata normal form. 63/1127 useless extension candidates. Maximal degree in co-relation 4377. Up to 504 conditions per place. [2025-03-17 06:19:40,821 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 65 selfloop transitions, 17 changer transitions 67/152 dead transitions. [2025-03-17 06:19:40,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 152 transitions, 1435 flow [2025-03-17 06:19:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:19:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:19:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2025-03-17 06:19:40,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2025-03-17 06:19:40,823 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 435 flow. Second operand 19 states and 231 transitions. [2025-03-17 06:19:40,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 152 transitions, 1435 flow [2025-03-17 06:19:40,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 152 transitions, 1343 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-03-17 06:19:40,836 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 559 flow [2025-03-17 06:19:40,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=559, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2025-03-17 06:19:40,836 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2025-03-17 06:19:40,837 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 559 flow [2025-03-17 06:19:40,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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 06:19:40,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:40,837 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:40,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:19:41,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:41,041 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:41,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1752855453, now seen corresponding path program 2 times [2025-03-17 06:19:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145184371] [2025-03-17 06:19:41,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:41,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:41,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:41,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:41,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:41,221 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 06:19:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145184371] [2025-03-17 06:19:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145184371] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:41,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:41,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:41,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510377359] [2025-03-17 06:19:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:41,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:41,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:41,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:41,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:41,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 559 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:41,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:41,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:42,322 INFO L124 PetriNetUnfolderBase]: 661/1235 cut-off events. [2025-03-17 06:19:42,322 INFO L125 PetriNetUnfolderBase]: For 21079/21079 co-relation queries the response was YES. [2025-03-17 06:19:42,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1235 events. 661/1235 cut-off events. For 21079/21079 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5748 event pairs, 144 based on Foata normal form. 27/1258 useless extension candidates. Maximal degree in co-relation 6313. Up to 501 conditions per place. [2025-03-17 06:19:42,330 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 77 selfloop transitions, 23 changer transitions 31/134 dead transitions. [2025-03-17 06:19:42,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1579 flow [2025-03-17 06:19:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:19:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:19:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 187 transitions. [2025-03-17 06:19:42,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2025-03-17 06:19:42,332 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 559 flow. Second operand 15 states and 187 transitions. [2025-03-17 06:19:42,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1579 flow [2025-03-17 06:19:42,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 134 transitions, 1247 flow, removed 155 selfloop flow, removed 12 redundant places. [2025-03-17 06:19:42,351 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 617 flow [2025-03-17 06:19:42,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=617, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2025-03-17 06:19:42,353 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2025-03-17 06:19:42,354 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 617 flow [2025-03-17 06:19:42,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:42,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:42,355 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:42,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:19:42,355 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:42,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash 419544819, now seen corresponding path program 3 times [2025-03-17 06:19:42,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:42,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586561612] [2025-03-17 06:19:42,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:42,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:42,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:42,437 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:19:42,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:42,772 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 06:19:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586561612] [2025-03-17 06:19:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586561612] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:42,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752905] [2025-03-17 06:19:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:42,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:42,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:42,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:42,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:42,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:42,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:42,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:42,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:43,094 INFO L124 PetriNetUnfolderBase]: 598/1127 cut-off events. [2025-03-17 06:19:43,095 INFO L125 PetriNetUnfolderBase]: For 15552/15552 co-relation queries the response was YES. [2025-03-17 06:19:43,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5381 conditions, 1127 events. 598/1127 cut-off events. For 15552/15552 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5166 event pairs, 150 based on Foata normal form. 45/1168 useless extension candidates. Maximal degree in co-relation 5337. Up to 471 conditions per place. [2025-03-17 06:19:43,106 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 65 selfloop transitions, 24 changer transitions 39/131 dead transitions. [2025-03-17 06:19:43,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 1473 flow [2025-03-17 06:19:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:19:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:19:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2025-03-17 06:19:43,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2025-03-17 06:19:43,107 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 617 flow. Second operand 14 states and 173 transitions. [2025-03-17 06:19:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 1473 flow [2025-03-17 06:19:43,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1293 flow, removed 74 selfloop flow, removed 10 redundant places. [2025-03-17 06:19:43,133 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 614 flow [2025-03-17 06:19:43,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=614, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2025-03-17 06:19:43,134 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2025-03-17 06:19:43,134 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 614 flow [2025-03-17 06:19:43,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:43,135 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:43,135 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:43,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:19:43,135 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:43,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash 286114721, now seen corresponding path program 1 times [2025-03-17 06:19:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:43,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23624267] [2025-03-17 06:19:43,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:43,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:19:43,144 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:19:43,144 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:43,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:43,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23624267] [2025-03-17 06:19:43,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23624267] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064164597] [2025-03-17 06:19:43,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:43,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:43,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:43,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:43,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:19:43,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:19:43,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:19:43,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:43,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:43,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:19:43,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:43,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064164597] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:43,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-17 06:19:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752709449] [2025-03-17 06:19:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:43,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:19:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:43,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:19:43,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:19:43,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:43,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 614 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 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 06:19:43,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:43,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:43,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:44,049 INFO L124 PetriNetUnfolderBase]: 841/1575 cut-off events. [2025-03-17 06:19:44,049 INFO L125 PetriNetUnfolderBase]: For 27476/27476 co-relation queries the response was YES. [2025-03-17 06:19:44,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 1575 events. 841/1575 cut-off events. For 27476/27476 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7782 event pairs, 36 based on Foata normal form. 72/1643 useless extension candidates. Maximal degree in co-relation 8138. Up to 255 conditions per place. [2025-03-17 06:19:44,059 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 55 changer transitions 88/225 dead transitions. [2025-03-17 06:19:44,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 225 transitions, 2634 flow [2025-03-17 06:19:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 06:19:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 06:19:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 341 transitions. [2025-03-17 06:19:44,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5074404761904762 [2025-03-17 06:19:44,061 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 614 flow. Second operand 28 states and 341 transitions. [2025-03-17 06:19:44,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 225 transitions, 2634 flow [2025-03-17 06:19:44,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 225 transitions, 2456 flow, removed 67 selfloop flow, removed 12 redundant places. [2025-03-17 06:19:44,090 INFO L231 Difference]: Finished difference. Result has 127 places, 76 transitions, 1102 flow [2025-03-17 06:19:44,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1102, PETRI_PLACES=127, PETRI_TRANSITIONS=76} [2025-03-17 06:19:44,092 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 101 predicate places. [2025-03-17 06:19:44,092 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 76 transitions, 1102 flow [2025-03-17 06:19:44,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 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 06:19:44,092 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:44,092 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:44,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:19:44,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 06:19:44,293 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:44,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1629126176, now seen corresponding path program 2 times [2025-03-17 06:19:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267004906] [2025-03-17 06:19:44,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:44,300 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:19:44,307 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:19:44,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:44,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267004906] [2025-03-17 06:19:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267004906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462903555] [2025-03-17 06:19:44,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:44,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:44,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:44,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:19:44,436 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:19:44,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:19:44,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:44,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:19:44,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462903555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:44,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:44,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-17 06:19:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242720759] [2025-03-17 06:19:44,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:44,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:19:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:44,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:19:44,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:19:44,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:44,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 76 transitions, 1102 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 06:19:44,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:44,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:44,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:45,426 INFO L124 PetriNetUnfolderBase]: 1417/2670 cut-off events. [2025-03-17 06:19:45,426 INFO L125 PetriNetUnfolderBase]: For 116610/116610 co-relation queries the response was YES. [2025-03-17 06:19:45,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19112 conditions, 2670 events. 1417/2670 cut-off events. For 116610/116610 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 14779 event pairs, 54 based on Foata normal form. 90/2756 useless extension candidates. Maximal degree in co-relation 19051. Up to 534 conditions per place. [2025-03-17 06:19:45,446 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 120 selfloop transitions, 91 changer transitions 110/324 dead transitions. [2025-03-17 06:19:45,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 324 transitions, 5645 flow [2025-03-17 06:19:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-17 06:19:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-17 06:19:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 456 transitions. [2025-03-17 06:19:45,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2025-03-17 06:19:45,448 INFO L175 Difference]: Start difference. First operand has 127 places, 76 transitions, 1102 flow. Second operand 37 states and 456 transitions. [2025-03-17 06:19:45,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 324 transitions, 5645 flow [2025-03-17 06:19:45,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 324 transitions, 4418 flow, removed 583 selfloop flow, removed 17 redundant places. [2025-03-17 06:19:45,525 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 1998 flow [2025-03-17 06:19:45,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1998, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2025-03-17 06:19:45,526 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 137 predicate places. [2025-03-17 06:19:45,526 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 1998 flow [2025-03-17 06:19:45,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 06:19:45,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:45,526 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:45,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:19:45,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:45,727 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:45,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash 728336222, now seen corresponding path program 3 times [2025-03-17 06:19:45,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:45,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299874532] [2025-03-17 06:19:45,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:45,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:45,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-17 06:19:45,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:19:45,757 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:19:45,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299874532] [2025-03-17 06:19:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299874532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272200172] [2025-03-17 06:19:45,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:45,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:45,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:45,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:19:45,945 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-17 06:19:45,956 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:19:45,956 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:19:45,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:45,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:19:45,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272200172] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:46,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2025-03-17 06:19:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657358553] [2025-03-17 06:19:46,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:46,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:19:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:46,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:19:46,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:19:46,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:46,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 1998 flow. Second operand has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:46,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:46,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:46,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:47,066 INFO L124 PetriNetUnfolderBase]: 1660/3200 cut-off events. [2025-03-17 06:19:47,066 INFO L125 PetriNetUnfolderBase]: For 244879/244879 co-relation queries the response was YES. [2025-03-17 06:19:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25777 conditions, 3200 events. 1660/3200 cut-off events. For 244879/244879 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 17648 event pairs, 44 based on Foata normal form. 108/3304 useless extension candidates. Maximal degree in co-relation 25700. Up to 645 conditions per place. [2025-03-17 06:19:47,095 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 115 selfloop transitions, 118 changer transitions 103/339 dead transitions. [2025-03-17 06:19:47,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 339 transitions, 6969 flow [2025-03-17 06:19:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-17 06:19:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-17 06:19:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 417 transitions. [2025-03-17 06:19:47,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5110294117647058 [2025-03-17 06:19:47,097 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 1998 flow. Second operand 34 states and 417 transitions. [2025-03-17 06:19:47,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 339 transitions, 6969 flow [2025-03-17 06:19:47,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 339 transitions, 5145 flow, removed 888 selfloop flow, removed 22 redundant places. [2025-03-17 06:19:47,339 INFO L231 Difference]: Finished difference. Result has 181 places, 143 transitions, 2450 flow [2025-03-17 06:19:47,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2450, PETRI_PLACES=181, PETRI_TRANSITIONS=143} [2025-03-17 06:19:47,340 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2025-03-17 06:19:47,340 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 143 transitions, 2450 flow [2025-03-17 06:19:47,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:47,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:47,340 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:47,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:19:47,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:47,545 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:47,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash 998932156, now seen corresponding path program 4 times [2025-03-17 06:19:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:47,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778711864] [2025-03-17 06:19:47,546 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:47,551 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-03-17 06:19:47,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 39 of 42 statements. [2025-03-17 06:19:47,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:19:47,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:19:47,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:47,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778711864] [2025-03-17 06:19:47,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778711864] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:47,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:47,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:19:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330403358] [2025-03-17 06:19:47,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:47,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:47,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:47,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:47,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:47,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:19:47,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 143 transitions, 2450 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 06:19:47,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:47,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:19:47,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:48,624 INFO L124 PetriNetUnfolderBase]: 4617/8013 cut-off events. [2025-03-17 06:19:48,624 INFO L125 PetriNetUnfolderBase]: For 361446/361446 co-relation queries the response was YES. [2025-03-17 06:19:48,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47921 conditions, 8013 events. 4617/8013 cut-off events. For 361446/361446 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 51874 event pairs, 160 based on Foata normal form. 0/7289 useless extension candidates. Maximal degree in co-relation 47848. Up to 2055 conditions per place. [2025-03-17 06:19:48,662 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 546/546 dead transitions. [2025-03-17 06:19:48,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 546 transitions, 9476 flow [2025-03-17 06:19:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:19:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:19:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2025-03-17 06:19:48,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.671875 [2025-03-17 06:19:48,663 INFO L175 Difference]: Start difference. First operand has 181 places, 143 transitions, 2450 flow. Second operand 8 states and 129 transitions. [2025-03-17 06:19:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 546 transitions, 9476 flow [2025-03-17 06:19:48,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 546 transitions, 8000 flow, removed 593 selfloop flow, removed 20 redundant places. [2025-03-17 06:19:48,985 INFO L231 Difference]: Finished difference. Result has 157 places, 0 transitions, 0 flow [2025-03-17 06:19:48,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=157, PETRI_TRANSITIONS=0} [2025-03-17 06:19:48,985 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 131 predicate places. [2025-03-17 06:19:48,985 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 0 transitions, 0 flow [2025-03-17 06:19:48,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 06:19:48,987 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-03-17 06:19:48,987 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-03-17 06:19:48,987 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-03-17 06:19:48,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:19:48,988 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 1, 1] [2025-03-17 06:19:48,990 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-17 06:19:48,990 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-17 06:19:48,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:19:48 BasicIcfg [2025-03-17 06:19:48,993 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-17 06:19:48,994 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-17 06:19:48,994 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-17 06:19:48,994 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-17 06:19:48,994 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:37" (3/4) ... [2025-03-17 06:19:48,996 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-17 06:19:48,998 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t1 [2025-03-17 06:19:48,998 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t2 [2025-03-17 06:19:48,999 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2025-03-17 06:19:49,000 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2025-03-17 06:19:49,000 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-03-17 06:19:49,000 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-03-17 06:19:49,000 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-17 06:19:49,051 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-17 06:19:49,052 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-17 06:19:49,052 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-17 06:19:49,053 INFO L158 Benchmark]: Toolchain (without parser) took 12561.33ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 108.0MB in the beginning and 198.0MB in the end (delta: -90.0MB). Peak memory consumption was 160.2MB. Max. memory is 16.1GB. [2025-03-17 06:19:49,053 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 127.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:49,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.14ms. Allocated memory is still 142.6MB. Free memory was 108.0MB in the beginning and 89.2MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 06:19:49,054 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.35ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 86.9MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-17 06:19:49,055 INFO L158 Benchmark]: Boogie Preprocessor took 41.31ms. Allocated memory is still 142.6MB. Free memory was 86.9MB in the beginning and 85.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:49,055 INFO L158 Benchmark]: IcfgBuilder took 383.34ms. Allocated memory is still 142.6MB. Free memory was 85.8MB in the beginning and 67.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 06:19:49,056 INFO L158 Benchmark]: TraceAbstraction took 11663.22ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 66.8MB in the beginning and 202.8MB in the end (delta: -135.9MB). Peak memory consumption was 314.1MB. Max. memory is 16.1GB. [2025-03-17 06:19:49,056 INFO L158 Benchmark]: Witness Printer took 58.37ms. Allocated memory is still 394.3MB. Free memory was 202.8MB in the beginning and 198.0MB in the end (delta: 4.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:49,057 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 127.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.14ms. Allocated memory is still 142.6MB. Free memory was 108.0MB in the beginning and 89.2MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.35ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 86.9MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.31ms. Allocated memory is still 142.6MB. Free memory was 86.9MB in the beginning and 85.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 383.34ms. Allocated memory is still 142.6MB. Free memory was 85.8MB in the beginning and 67.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 11663.22ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 66.8MB in the beginning and 202.8MB in the end (delta: -135.9MB). Peak memory consumption was 314.1MB. Max. memory is 16.1GB. * Witness Printer took 58.37ms. Allocated memory is still 394.3MB. Free memory was 202.8MB in the beginning and 198.0MB in the end (delta: 4.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 36 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.6s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2023 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2017 mSDsluCounter, 67 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3331 IncrementalHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 3 mSDtfsCounter, 3331 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 404 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2450occurred in iteration=12, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 339 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 1593 SizeOfPredicates, 22 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 21 InterpolantComputations, 9 PerfectInterpolantSequences, 52/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-17 06:19:49,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE