./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-5.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/fib_unsafe-5.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 e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:17:48,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:17:48,519 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:17:48,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:17:48,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:17:48,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:17:48,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:17:48,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:17:48,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:17:48,550 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:17:48,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:17:48,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:17:48,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:17:48,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:17:48,551 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:17:48,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:17:48,552 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:17:48,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:17:48,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:17:48,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:17:48,553 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 -> e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 [2025-03-17 06:17:48,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:17:48,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:17:48,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:17:48,772 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:17:48,772 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:17:48,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-5.i [2025-03-17 06:17:49,893 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5b9086ec/5285b227c8b64ced92a0e26de5611748/FLAGac861976d [2025-03-17 06:17:50,212 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:17:50,212 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-5.i [2025-03-17 06:17:50,225 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5b9086ec/5285b227c8b64ced92a0e26de5611748/FLAGac861976d [2025-03-17 06:17:50,239 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5b9086ec/5285b227c8b64ced92a0e26de5611748 [2025-03-17 06:17:50,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:17:50,245 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:17:50,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:17:50,246 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:17:50,248 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:17:50,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,252 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aadf523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50, skipping insertion in model container [2025-03-17 06:17:50,252 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:17:50,499 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/fib_unsafe-5.i[30243,30256] [2025-03-17 06:17:50,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:17:50,530 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:17:50,560 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/fib_unsafe-5.i[30243,30256] [2025-03-17 06:17:50,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:17:50,595 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:17:50,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50 WrapperNode [2025-03-17 06:17:50,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:17:50,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:17:50,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:17:50,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:17:50,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,632 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-17 06:17:50,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:17:50,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:17:50,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:17:50,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:17:50,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,651 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 06:17:50,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,654 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:17:50,664 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:17:50,664 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:17:50,664 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:17:50,665 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (1/1) ... [2025-03-17 06:17:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:17:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:17:50,693 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 06:17:50,698 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 06:17:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 06:17:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 06:17:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:17:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:17:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:17:50,715 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 06:17:50,808 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:17:50,810 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:17:50,945 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:17:50,945 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:17:51,025 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:17:51,026 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:17:51,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:17:51 BoogieIcfgContainer [2025-03-17 06:17:51,026 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:17:51,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:17:51,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:17:51,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:17:51,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:17:50" (1/3) ... [2025-03-17 06:17:51,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edc8e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:17:51, skipping insertion in model container [2025-03-17 06:17:51,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:17:50" (2/3) ... [2025-03-17 06:17:51,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edc8e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:17:51, skipping insertion in model container [2025-03-17 06:17:51,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:17:51" (3/3) ... [2025-03-17 06:17:51,036 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2025-03-17 06:17:51,047 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:17:51,048 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-5.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-17 06:17:51,048 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:17:51,087 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:17:51,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-17 06:17:51,133 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-17 06:17:51,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:17:51,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-17 06:17:51,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-17 06:17:51,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-17 06:17:51,150 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:17:51,159 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;@4f3fd7bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:17:51,159 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:17:51,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:17:51,168 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-17 06:17:51,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:17:51,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:17:51,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:17:51,170 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 06:17:51,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:17:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 145593975, now seen corresponding path program 1 times [2025-03-17 06:17:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:17:51,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366324856] [2025-03-17 06:17:51,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:17:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:17:51,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 06:17:51,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 06:17:51,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:17:51,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:51,349 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 06:17:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:17:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366324856] [2025-03-17 06:17:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366324856] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:17:51,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:17:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:17:51,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606938747] [2025-03-17 06:17:51,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:17:51,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:17:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:17:51,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:17:51,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:17:51,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-17 06:17:51,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 06:17:51,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:17:51,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-17 06:17:51,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:17:51,543 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-17 06:17:51,544 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:17:51,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1586 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-17 06:17:51,550 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-17 06:17:51,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-17 06:17:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:17:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:17:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-17 06:17:51,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-17 06:17:51,562 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-17 06:17:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-17 06:17:51,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:17:51,567 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-17 06:17:51,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-03-17 06:17:51,571 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-17 06:17:51,572 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-17 06:17:51,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 06:17:51,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:17:51,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:17:51,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:17:51,573 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 06:17:51,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:17:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash 230211881, now seen corresponding path program 1 times [2025-03-17 06:17:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:17:51,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168859061] [2025-03-17 06:17:51,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:17:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:17:51,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 06:17:51,600 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 06:17:51,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:17:51,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:51,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:17:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168859061] [2025-03-17 06:17:51,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168859061] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:17:51,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650783885] [2025-03-17 06:17:51,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:17:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:17:51,666 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 06:17:51,668 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 06:17:51,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 06:17:51,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 06:17:51,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:17:51,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:51,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 06:17:51,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:17:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:51,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:17:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650783885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:17:51,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:17:51,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-17 06:17:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653311858] [2025-03-17 06:17:51,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:17:51,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:17:51,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:17:51,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:17:51,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:17:51,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-17 06:17:51,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 06:17:51,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:17:51,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-17 06:17:51,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:17:51,900 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-17 06:17:51,901 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:17:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1895 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-17 06:17:51,903 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-17 06:17:51,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-17 06:17:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:17:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:17:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-17 06:17:51,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-17 06:17:51,905 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-17 06:17:51,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-17 06:17:51,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:17:51,906 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-17 06:17:51,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-03-17 06:17:51,907 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-17 06:17:51,907 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-17 06:17:51,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 06:17:51,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:17:51,907 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:17:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:17:52,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:52,111 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 06:17:52,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:17:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2021936393, now seen corresponding path program 2 times [2025-03-17 06:17:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:17:52,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540521680] [2025-03-17 06:17:52,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:17:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:17:52,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-17 06:17:52,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:17:52,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:17:52,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:52,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:17:52,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540521680] [2025-03-17 06:17:52,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540521680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:17:52,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005213516] [2025-03-17 06:17:52,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:17:52,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:52,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:17:52,227 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 06:17:52,228 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 06:17:52,269 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-17 06:17:52,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:17:52,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:17:52,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:52,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:17:52,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:17:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:52,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:17:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005213516] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:17:52,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:17:52,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-17 06:17:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105424423] [2025-03-17 06:17:52,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:17:52,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 06:17:52,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:17:52,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 06:17:52,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:17:52,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-17 06:17:52,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 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 06:17:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:17:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-17 06:17:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:17:52,595 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-17 06:17:52,595 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-17 06:17:52,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2906 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-17 06:17:52,602 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-17 06:17:52,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-17 06:17:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:17:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:17:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-17 06:17:52,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-17 06:17:52,606 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-17 06:17:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-17 06:17:52,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 06:17:52,611 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-17 06:17:52,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-03-17 06:17:52,612 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-17 06:17:52,613 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-17 06:17:52,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 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 06:17:52,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:17:52,613 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:17:52,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:17:52,814 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,SelfDestructingSolverStorable2 [2025-03-17 06:17:52,814 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 06:17:52,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:17:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -72178249, now seen corresponding path program 3 times [2025-03-17 06:17:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:17:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-03-17 06:17:52,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:17:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:17:52,822 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-17 06:17:52,859 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:17:52,859 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 06:17:52,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:53,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:17:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-03-17 06:17:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274927039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:17:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897805888] [2025-03-17 06:17:53,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:17:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:17:53,051 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 06:17:53,051 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 06:17:53,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-17 06:17:53,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:17:53,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 06:17:53,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:53,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:17:53,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:17:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:53,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:17:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897805888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:17:53,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:17:53,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-03-17 06:17:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448999253] [2025-03-17 06:17:53,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:17:53,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:17:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:17:53,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:17:53,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:17:53,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-17 06:17:53,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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 06:17:53,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:17:53,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-17 06:17:53,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:17:53,457 INFO L124 PetriNetUnfolderBase]: 553/890 cut-off events. [2025-03-17 06:17:53,457 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2025-03-17 06:17:53,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 890 events. 553/890 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3282 event pairs, 39 based on Foata normal form. 32/901 useless extension candidates. Maximal degree in co-relation 2557. Up to 209 conditions per place. [2025-03-17 06:17:53,463 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 115 selfloop transitions, 13 changer transitions 0/133 dead transitions. [2025-03-17 06:17:53,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 634 flow [2025-03-17 06:17:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:17:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:17:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2025-03-17 06:17:53,465 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2025-03-17 06:17:53,465 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 14 states and 228 transitions. [2025-03-17 06:17:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 634 flow [2025-03-17 06:17:53,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 133 transitions, 582 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-03-17 06:17:53,475 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 170 flow [2025-03-17 06:17:53,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=170, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2025-03-17 06:17:53,476 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2025-03-17 06:17:53,476 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 170 flow [2025-03-17 06:17:53,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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 06:17:53,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:17:53,477 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:17:53,485 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 06:17:53,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:53,678 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 06:17:53,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:17:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash -267310089, now seen corresponding path program 4 times [2025-03-17 06:17:53,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:17:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992250091] [2025-03-17 06:17:53,679 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:17:53,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:17:53,685 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:17:53,698 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:17:53,699 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:17:53,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:17:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992250091] [2025-03-17 06:17:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992250091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:17:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654916518] [2025-03-17 06:17:54,404 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:17:54,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:17:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:17:54,407 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 06:17:54,408 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 06:17:54,449 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:17:54,474 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:17:54,474 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:17:54,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:17:54,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-17 06:17:54,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:17:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:55,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:17:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:17:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654916518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:17:55,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:17:55,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2025-03-17 06:17:55,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570511439] [2025-03-17 06:17:55,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:17:55,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-17 06:17:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:17:55,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-17 06:17:55,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2685, Unknown=0, NotChecked=0, Total=3080 [2025-03-17 06:17:56,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-17 06:17:56,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 170 flow. Second operand has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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 06:17:56,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:17:56,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-17 06:17:56,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:07,104 INFO L124 PetriNetUnfolderBase]: 12397/20343 cut-off events. [2025-03-17 06:18:07,105 INFO L125 PetriNetUnfolderBase]: For 34421/34421 co-relation queries the response was YES. [2025-03-17 06:18:07,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52303 conditions, 20343 events. 12397/20343 cut-off events. For 34421/34421 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 129512 event pairs, 104 based on Foata normal form. 0/20057 useless extension candidates. Maximal degree in co-relation 52273. Up to 2616 conditions per place. [2025-03-17 06:18:07,208 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 494 selfloop transitions, 444 changer transitions 613/1554 dead transitions. [2025-03-17 06:18:07,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1554 transitions, 8745 flow [2025-03-17 06:18:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2025-03-17 06:18:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2025-03-17 06:18:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 2032 transitions. [2025-03-17 06:18:07,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46098003629764067 [2025-03-17 06:18:07,215 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 170 flow. Second operand 152 states and 2032 transitions. [2025-03-17 06:18:07,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1554 transitions, 8745 flow [2025-03-17 06:18:07,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1554 transitions, 7763 flow, removed 210 selfloop flow, removed 11 redundant places. [2025-03-17 06:18:07,273 INFO L231 Difference]: Finished difference. Result has 265 places, 526 transitions, 3166 flow [2025-03-17 06:18:07,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=152, PETRI_FLOW=3166, PETRI_PLACES=265, PETRI_TRANSITIONS=526} [2025-03-17 06:18:07,274 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2025-03-17 06:18:07,275 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 526 transitions, 3166 flow [2025-03-17 06:18:07,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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 06:18:07,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:07,276 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:07,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:18:07,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:07,476 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 06:18:07,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1233435499, now seen corresponding path program 1 times [2025-03-17 06:18:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824407986] [2025-03-17 06:18:07,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:07,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:18:07,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:18:07,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:07,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824407986] [2025-03-17 06:18:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824407986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847280557] [2025-03-17 06:18:08,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:08,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:08,090 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:08,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:18:08,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:18:08,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:18:08,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:08,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:08,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-17 06:18:08,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:08,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:18:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847280557] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:18:09,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:18:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2025-03-17 06:18:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980326773] [2025-03-17 06:18:09,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:18:09,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-17 06:18:09,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:09,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-17 06:18:09,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3101, Unknown=0, NotChecked=0, Total=3540 [2025-03-17 06:18:09,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-17 06:18:09,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 526 transitions, 3166 flow. Second operand has 60 states, 60 states have (on average 6.366666666666666) internal successors, (382), 60 states have internal predecessors, (382), 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 06:18:09,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:09,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-17 06:18:09,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:06,338 INFO L124 PetriNetUnfolderBase]: 122167/201545 cut-off events. [2025-03-17 06:19:06,339 INFO L125 PetriNetUnfolderBase]: For 9115912/9115912 co-relation queries the response was YES. [2025-03-17 06:19:09,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063105 conditions, 201545 events. 122167/201545 cut-off events. For 9115912/9115912 co-relation queries the response was YES. Maximal size of possible extension queue 3425. Compared 1819678 event pairs, 7276 based on Foata normal form. 4959/206500 useless extension candidates. Maximal degree in co-relation 1063012. Up to 23190 conditions per place. [2025-03-17 06:19:09,961 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1556 selfloop transitions, 4748 changer transitions 2973/9280 dead transitions. [2025-03-17 06:19:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 9280 transitions, 77385 flow [2025-03-17 06:19:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2025-03-17 06:19:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2025-03-17 06:19:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 4659 transitions. [2025-03-17 06:19:09,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4538281706604325 [2025-03-17 06:19:09,971 INFO L175 Difference]: Start difference. First operand has 265 places, 526 transitions, 3166 flow. Second operand 354 states and 4659 transitions. [2025-03-17 06:19:09,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 9280 transitions, 77385 flow