./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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_safe-12.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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 01:59:16,455 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 01:59:16,520 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 01:59:16,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 01:59:16,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 01:59:16,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 01:59:16,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 01:59:16,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 01:59:16,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 01:59:16,547 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 01:59:16,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 01:59:16,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 01:59:16,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 01:59:16,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 01:59:16,553 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:16,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 01:59:16,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 01:59:16,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 01:59:16,554 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 -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2025-03-04 01:59:16,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 01:59:16,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 01:59:16,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 01:59:16,893 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 01:59:16,894 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 01:59:16,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-12.i [2025-03-04 01:59:18,291 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b654aa8/ece3d7fe54104705bf3bdfa6494443ad/FLAG04d27ce8b [2025-03-04 01:59:18,629 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 01:59:18,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-12.i [2025-03-04 01:59:18,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b654aa8/ece3d7fe54104705bf3bdfa6494443ad/FLAG04d27ce8b [2025-03-04 01:59:18,855 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b654aa8/ece3d7fe54104705bf3bdfa6494443ad [2025-03-04 01:59:18,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 01:59:18,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 01:59:18,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:18,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 01:59:18,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 01:59:18,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:18" (1/1) ... [2025-03-04 01:59:18,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ac541f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:18, skipping insertion in model container [2025-03-04 01:59:18,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:18" (1/1) ... [2025-03-04 01:59:18,915 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 01:59:19,160 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_safe-12.i[30241,30254] [2025-03-04 01:59:19,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:19,190 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 01:59:19,218 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_safe-12.i[30241,30254] [2025-03-04 01:59:19,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:19,249 INFO L204 MainTranslator]: Completed translation [2025-03-04 01:59:19,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19 WrapperNode [2025-03-04 01:59:19,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:19,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:19,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 01:59:19,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 01:59:19,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,278 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-04 01:59:19,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:19,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 01:59:19,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 01:59:19,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 01:59:19,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,299 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]. [2025-03-04 01:59:19,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,303 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 01:59:19,308 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 01:59:19,308 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 01:59:19,308 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 01:59:19,309 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (1/1) ... [2025-03-04 01:59:19,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:19,348 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) [2025-03-04 01:59:19,355 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 [2025-03-04 01:59:19,376 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-04 01:59:19,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-04 01:59:19,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 01:59:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 01:59:19,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 01:59:19,378 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 01:59:19,474 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 01:59:19,475 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 01:59:19,607 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 01:59:19,607 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 01:59:19,677 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 01:59:19,677 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 01:59:19,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:19 BoogieIcfgContainer [2025-03-04 01:59:19,678 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 01:59:19,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 01:59:19,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 01:59:19,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 01:59:19,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 01:59:18" (1/3) ... [2025-03-04 01:59:19,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:19, skipping insertion in model container [2025-03-04 01:59:19,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:19" (2/3) ... [2025-03-04 01:59:19,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:19, skipping insertion in model container [2025-03-04 01:59:19,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:19" (3/3) ... [2025-03-04 01:59:19,691 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2025-03-04 01:59:19,703 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 01:59:19,704 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-04 01:59:19,705 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 01:59:19,745 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 01:59:19,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:19,798 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-04 01:59:19,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:19,806 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. [2025-03-04 01:59:19,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:19,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-04 01:59:19,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 01:59:19,828 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;@ee188ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 01:59:19,831 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 01:59:19,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 01:59:19,844 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-04 01:59:19,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:19,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:19,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:19,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:19,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -412560026, now seen corresponding path program 1 times [2025-03-04 01:59:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:19,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813271217] [2025-03-04 01:59:19,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:19,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 01:59:19,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 01:59:19,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:19,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813271217] [2025-03-04 01:59:20,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813271217] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 01:59:20,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 01:59:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 01:59:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371274664] [2025-03-04 01:59:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 01:59:20,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 01:59:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:20,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 01:59:20,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 01:59:20,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:20,142 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) [2025-03-04 01:59:20,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:20,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:20,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:20,275 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-04 01:59:20,275 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 01:59:20,276 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 1576 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. [2025-03-04 01:59:20,279 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-04 01:59:20,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 01:59:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 01:59:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-04 01:59:20,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-04 01:59:20,292 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-04 01:59:20,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:20,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 01:59:20,299 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:20,301 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} [2025-03-04 01:59:20,304 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-04 01:59:20,304 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:20,304 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) [2025-03-04 01:59:20,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:20,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:20,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 01:59:20,305 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:20,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 103279624, now seen corresponding path program 1 times [2025-03-04 01:59:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:20,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707951873] [2025-03-04 01:59:20,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:20,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:20,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:20,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:20,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707951873] [2025-03-04 01:59:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707951873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135404198] [2025-03-04 01:59:20,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:20,454 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) [2025-03-04 01:59:20,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 01:59:20,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:20,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:20,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:20,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:20,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 01:59:20,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:20,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135404198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:20,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-04 01:59:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078758048] [2025-03-04 01:59:20,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:20,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 01:59:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:20,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 01:59:20,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-04 01:59:20,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:20,621 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) [2025-03-04 01:59:20,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:20,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:20,803 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-04 01:59:20,803 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 01:59:20,805 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 1880 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. [2025-03-04 01:59:20,807 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-04 01:59:20,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 01:59:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 01:59:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-04 01:59:20,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-04 01:59:20,810 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-04 01:59:20,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:20,811 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:20,811 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} [2025-03-04 01:59:20,812 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-04 01:59:20,812 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:20,812 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) [2025-03-04 01:59:20,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:20,812 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:20,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 01:59:21,018 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 [2025-03-04 01:59:21,019 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:21,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 701132262, now seen corresponding path program 2 times [2025-03-04 01:59:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353443019] [2025-03-04 01:59:21,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:21,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:21,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:21,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:21,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353443019] [2025-03-04 01:59:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353443019] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676507073] [2025-03-04 01:59:21,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:21,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:21,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:21,187 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) [2025-03-04 01:59:21,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 01:59:21,253 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:21,280 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:21,281 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:21,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:21,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 01:59:21,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:21,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:21,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676507073] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:21,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:21,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-04 01:59:21,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152881202] [2025-03-04 01:59:21,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:21,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 01:59:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:21,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 01:59:21,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-04 01:59:21,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:21,390 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) [2025-03-04 01:59:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:21,651 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-04 01:59:21,652 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-04 01:59:21,654 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 2900 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. [2025-03-04 01:59:21,657 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-04 01:59:21,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 01:59:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 01:59:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-04 01:59:21,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-04 01:59:21,660 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-04 01:59:21,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:21,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:21,664 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:21,664 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} [2025-03-04 01:59:21,665 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-04 01:59:21,665 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:21,665 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) [2025-03-04 01:59:21,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:21,665 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:21,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 01:59:21,865 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 [2025-03-04 01:59:21,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:21,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1268144806, now seen corresponding path program 3 times [2025-03-04 01:59:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:21,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089021934] [2025-03-04 01:59:21,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:21,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:21,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:21,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:21,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089021934] [2025-03-04 01:59:22,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089021934] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898243784] [2025-03-04 01:59:22,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:22,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:22,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:22,103 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) [2025-03-04 01:59:22,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 01:59:22,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:22,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:22,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:22,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:22,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 01:59:22,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:22,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898243784] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:22,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:22,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-04 01:59:22,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075272505] [2025-03-04 01:59:22,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:22,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-04 01:59:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:22,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-04 01:59:22,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-04 01:59:22,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:22,920 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-04 01:59:22,920 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-04 01:59:22,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 1370 events. 873/1370 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4946 event pairs, 39 based on Foata normal form. 192/1541 useless extension candidates. Maximal degree in co-relation 3997. Up to 337 conditions per place. [2025-03-04 01:59:22,937 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-04 01:59:22,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 01:59:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 01:59:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-04 01:59:22,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-04 01:59:22,942 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-04 01:59:22,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:22,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-04 01:59:22,962 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:22,962 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=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-03-04 01:59:22,963 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-04 01:59:22,963 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:22,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:22,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:22,967 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:22,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 01:59:23,167 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 [2025-03-04 01:59:23,168 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:23,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash 167543846, now seen corresponding path program 4 times [2025-03-04 01:59:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:23,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529120291] [2025-03-04 01:59:23,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:23,184 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:23,212 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:23,212 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:23,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529120291] [2025-03-04 01:59:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529120291] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582719460] [2025-03-04 01:59:23,727 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:23,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:23,731 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) [2025-03-04 01:59:23,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 01:59:23,775 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:23,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:23,804 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:23,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:23,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-04 01:59:23,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:23,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:24,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582719460] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:24,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:24,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-03-04 01:59:24,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979504470] [2025-03-04 01:59:24,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:24,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-04 01:59:24,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:24,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-04 01:59:24,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-03-04 01:59:24,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:24,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-04 01:59:24,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:24,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:24,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:24,638 INFO L124 PetriNetUnfolderBase]: 1001/1562 cut-off events. [2025-03-04 01:59:24,638 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-03-04 01:59:24,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 1562 events. 1001/1562 cut-off events. For 16588/16588 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5694 event pairs, 39 based on Foata normal form. 64/1605 useless extension candidates. Maximal degree in co-relation 4765. Up to 305 conditions per place. [2025-03-04 01:59:24,656 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-03-04 01:59:24,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-03-04 01:59:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-04 01:59:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-04 01:59:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-03-04 01:59:24,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-03-04 01:59:24,660 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-03-04 01:59:24,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-03-04 01:59:24,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-04 01:59:24,685 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-03-04 01:59:24,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2025-03-04 01:59:24,686 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-03-04 01:59:24,686 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-03-04 01:59:24,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-04 01:59:24,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:24,687 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:24,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 01:59:24,887 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 [2025-03-04 01:59:24,888 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:24,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1768471718, now seen corresponding path program 5 times [2025-03-04 01:59:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696563736] [2025-03-04 01:59:24,889 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:24,900 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-04 01:59:25,034 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-04 01:59:25,034 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-04 01:59:25,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:26,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696563736] [2025-03-04 01:59:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696563736] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160188307] [2025-03-04 01:59:26,840 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:26,845 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) [2025-03-04 01:59:26,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 01:59:26,911 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-04 01:59:26,956 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-04 01:59:26,956 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-04 01:59:26,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:26,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-04 01:59:26,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:28,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160188307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:30,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:30,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 95 [2025-03-04 01:59:30,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772561807] [2025-03-04 01:59:30,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:30,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-04 01:59:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:30,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-04 01:59:30,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=7781, Unknown=0, NotChecked=0, Total=9120 [2025-03-04 01:59:31,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-04 01:59:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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) [2025-03-04 01:59:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-04 01:59:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:00:22,966 INFO L124 PetriNetUnfolderBase]: 41836/68765 cut-off events. [2025-03-04 02:00:22,967 INFO L125 PetriNetUnfolderBase]: For 264312/264312 co-relation queries the response was YES. [2025-03-04 02:00:23,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185804 conditions, 68765 events. 41836/68765 cut-off events. For 264312/264312 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 477836 event pairs, 711 based on Foata normal form. 0/68185 useless extension candidates. Maximal degree in co-relation 185760. Up to 8823 conditions per place. [2025-03-04 02:00:23,676 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 813 selfloop transitions, 1600 changer transitions 1229/3645 dead transitions. [2025-03-04 02:00:23,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3645 transitions, 24931 flow [2025-03-04 02:00:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-03-04 02:00:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-03-04 02:00:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3518 transitions. [2025-03-04 02:00:23,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4701951349906442 [2025-03-04 02:00:23,691 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3518 transitions. [2025-03-04 02:00:23,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3645 transitions, 24931 flow [2025-03-04 02:00:24,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3645 transitions, 20893 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-03-04 02:00:24,040 INFO L231 Difference]: Finished difference. Result has 455 places, 1752 transitions, 10812 flow [2025-03-04 02:00:24,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=10812, PETRI_PLACES=455, PETRI_TRANSITIONS=1752} [2025-03-04 02:00:24,041 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-03-04 02:00:24,041 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1752 transitions, 10812 flow [2025-03-04 02:00:24,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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) [2025-03-04 02:00:24,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:00:24,042 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:00:24,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 02:00:24,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:00:24,242 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:00:24,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:00:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 771720804, now seen corresponding path program 1 times [2025-03-04 02:00:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:00:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399685831] [2025-03-04 02:00:24,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:00:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:00:24,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-04 02:00:24,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-04 02:00:24,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:00:24,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:00:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:00:26,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:00:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399685831] [2025-03-04 02:00:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399685831] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:00:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832872779] [2025-03-04 02:00:26,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:00:26,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:00:26,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:00:26,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:00:26,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 02:00:26,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-04 02:00:26,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-04 02:00:26,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:00:26,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:00:26,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-04 02:00:26,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:00:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:00:27,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:00:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:00:29,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832872779] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:00:29,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:00:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 101 [2025-03-04 02:00:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430894051] [2025-03-04 02:00:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:00:29,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-03-04 02:00:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:00:29,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-03-04 02:00:29,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=8867, Unknown=0, NotChecked=0, Total=10302 [2025-03-04 02:00:30,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-04 02:00:30,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1752 transitions, 10812 flow. Second operand has 102 states, 102 states have (on average 6.215686274509804) internal successors, (634), 102 states have internal predecessors, (634), 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) [2025-03-04 02:00:30,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:00:30,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-04 02:00:30,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand