./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind2-100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 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-theta/unwind2-100.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 7857262d4d8d027aa598d94064d6edf426fece06c8ec09601338aa41711d7f37 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:54:46,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:54:46,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:54:46,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:54:46,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:54:46,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:54:46,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:54:46,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:54:46,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:54:46,515 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:54:46,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:54:46,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:54:46,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:54:46,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:54:46,516 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:54:46,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:54:46,517 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:54:46,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:54:46,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:54:46,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:54:46,518 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 -> 7857262d4d8d027aa598d94064d6edf426fece06c8ec09601338aa41711d7f37 [2025-03-13 21:54:46,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:54:46,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:54:46,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:54:46,749 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:54:46,749 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:54:46,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind2-100.i [2025-03-13 21:54:47,216 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7f73402/e9b9c79591d6446b8e5dd3baf762a507/FLAGbde29f486 [2025-03-13 21:54:48,877 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:54:48,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-100.i [2025-03-13 21:54:48,895 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7f73402/e9b9c79591d6446b8e5dd3baf762a507/FLAGbde29f486 [2025-03-13 21:54:49,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7f73402/e9b9c79591d6446b8e5dd3baf762a507 [2025-03-13 21:54:49,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:54:49,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:54:49,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:54:49,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:54:49,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:54:49,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d81f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49, skipping insertion in model container [2025-03-13 21:54:49,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:54:49,378 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-theta/unwind2-100.i[33026,33039] [2025-03-13 21:54:49,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:54:49,402 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:54:49,426 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-theta/unwind2-100.i[33026,33039] [2025-03-13 21:54:49,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:54:49,453 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:54:49,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49 WrapperNode [2025-03-13 21:54:49,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:54:49,454 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:54:49,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:54:49,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:54:49,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,475 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2025-03-13 21:54:49,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:54:49,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:54:49,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:54:49,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:54:49,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,489 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]. [2025-03-13 21:54:49,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,493 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:54:49,496 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:54:49,496 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:54:49,496 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:54:49,497 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (1/1) ... [2025-03-13 21:54:49,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:54:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:49,522 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) [2025-03-13 21:54:49,526 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 [2025-03-13 21:54:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:54:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-03-13 21:54:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-03-13 21:54:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-03-13 21:54:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-03-13 21:54:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:54:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:54:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:54:49,542 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:54:49,630 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:54:49,632 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:54:49,728 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:54:49,729 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:54:49,729 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:54:49,792 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:54:49,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:54:49 BoogieIcfgContainer [2025-03-13 21:54:49,793 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:54:49,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:54:49,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:54:49,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:54:49,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:54:49" (1/3) ... [2025-03-13 21:54:49,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b4ca26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:54:49, skipping insertion in model container [2025-03-13 21:54:49,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:49" (2/3) ... [2025-03-13 21:54:49,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b4ca26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:54:49, skipping insertion in model container [2025-03-13 21:54:49,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:54:49" (3/3) ... [2025-03-13 21:54:49,799 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind2-100.i [2025-03-13 21:54:49,810 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:54:49,812 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind2-100.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-13 21:54:49,813 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:54:49,849 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:54:49,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2025-03-13 21:54:49,896 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-13 21:54:49,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:54:49,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2025-03-13 21:54:49,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2025-03-13 21:54:49,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2025-03-13 21:54:49,909 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:54:49,919 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;@10632ff4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:54:49,920 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-13 21:54:49,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:54:49,928 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-13 21:54:49,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:54:49,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:49,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:49,933 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:49,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1583119239, now seen corresponding path program 1 times [2025-03-13 21:54:49,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:49,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672050447] [2025-03-13 21:54:49,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:50,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-13 21:54:50,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-13 21:54:50,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:50,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672050447] [2025-03-13 21:54:50,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672050447] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:50,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:50,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:54:50,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005213516] [2025-03-13 21:54:50,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:50,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:50,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:50,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:54:50,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:50,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:54:50,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:50,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:50,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:50,427 INFO L124 PetriNetUnfolderBase]: 211/450 cut-off events. [2025-03-13 21:54:50,427 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-13 21:54:50,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 450 events. 211/450 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2207 event pairs, 26 based on Foata normal form. 48/420 useless extension candidates. Maximal degree in co-relation 780. Up to 153 conditions per place. [2025-03-13 21:54:50,432 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-03-13 21:54:50,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 63 transitions, 261 flow [2025-03-13 21:54:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:54:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:54:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2025-03-13 21:54:50,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2025-03-13 21:54:50,444 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 7 states and 122 transitions. [2025-03-13 21:54:50,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 63 transitions, 261 flow [2025-03-13 21:54:50,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 63 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:50,452 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 101 flow [2025-03-13 21:54:50,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2025-03-13 21:54:50,457 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2025-03-13 21:54:50,458 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 101 flow [2025-03-13 21:54:50,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:54:50,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:50,459 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:50,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:54:50,459 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:50,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1832025527, now seen corresponding path program 1 times [2025-03-13 21:54:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:50,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070714640] [2025-03-13 21:54:50,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:50,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:54:50,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:54:50,480 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:50,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070714640] [2025-03-13 21:54:50,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070714640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044953435] [2025-03-13 21:54:50,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:50,584 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) [2025-03-13 21:54:50,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:54:50,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:54:50,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:54:50,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:50,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:50,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-13 21:54:50,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:50,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:50,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044953435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:50,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:50,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:54:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605936155] [2025-03-13 21:54:50,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:50,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:54:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:50,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:54:50,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:54:50,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:50,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 101 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 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) [2025-03-13 21:54:50,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:50,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:50,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:51,117 INFO L124 PetriNetUnfolderBase]: 307/630 cut-off events. [2025-03-13 21:54:51,117 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2025-03-13 21:54:51,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 630 events. 307/630 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3167 event pairs, 26 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1400. Up to 153 conditions per place. [2025-03-13 21:54:51,123 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 88 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2025-03-13 21:54:51,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 111 transitions, 533 flow [2025-03-13 21:54:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:54:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:54:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2025-03-13 21:54:51,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2025-03-13 21:54:51,126 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 101 flow. Second operand 13 states and 215 transitions. [2025-03-13 21:54:51,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 111 transitions, 533 flow [2025-03-13 21:54:51,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 111 transitions, 519 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:51,130 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 212 flow [2025-03-13 21:54:51,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=212, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2025-03-13 21:54:51,131 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2025-03-13 21:54:51,131 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 212 flow [2025-03-13 21:54:51,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 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) [2025-03-13 21:54:51,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:51,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:51,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:51,332 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 [2025-03-13 21:54:51,333 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:51,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -225954777, now seen corresponding path program 1 times [2025-03-13 21:54:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:51,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752946461] [2025-03-13 21:54:51,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:51,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-13 21:54:51,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-13 21:54:51,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:51,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752946461] [2025-03-13 21:54:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752946461] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:51,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:51,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:54:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912949354] [2025-03-13 21:54:51,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:51,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:51,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:51,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:51,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:54:51,409 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:51,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2025-03-13 21:54:51,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:51,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:51,560 INFO L124 PetriNetUnfolderBase]: 363/760 cut-off events. [2025-03-13 21:54:51,561 INFO L125 PetriNetUnfolderBase]: For 1257/1257 co-relation queries the response was YES. [2025-03-13 21:54:51,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2206 conditions, 760 events. 363/760 cut-off events. For 1257/1257 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3949 event pairs, 86 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 1460. Up to 245 conditions per place. [2025-03-13 21:54:51,565 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 66 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2025-03-13 21:54:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 662 flow [2025-03-13 21:54:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:54:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:54:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2025-03-13 21:54:51,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-03-13 21:54:51,566 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 212 flow. Second operand 7 states and 112 transitions. [2025-03-13 21:54:51,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 662 flow [2025-03-13 21:54:51,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 85 transitions, 542 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-03-13 21:54:51,576 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 231 flow [2025-03-13 21:54:51,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2025-03-13 21:54:51,578 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2025-03-13 21:54:51,578 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 231 flow [2025-03-13 21:54:51,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2025-03-13 21:54:51,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:51,579 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:51,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:54:51,579 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:51,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1585305889, now seen corresponding path program 1 times [2025-03-13 21:54:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889595011] [2025-03-13 21:54:51,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:51,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-13 21:54:51,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-13 21:54:51,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:51,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:51,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889595011] [2025-03-13 21:54:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889595011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:51,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000069995] [2025-03-13 21:54:51,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:51,677 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) [2025-03-13 21:54:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:54:51,713 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-13 21:54:51,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-13 21:54:51,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:51,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:51,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-13 21:54:51,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:51,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:51,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000069995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:51,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:51,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:54:51,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292245851] [2025-03-13 21:54:51,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:51,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:54:51,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:51,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:54:51,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:54:51,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:51,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 231 flow. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 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) [2025-03-13 21:54:51,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:51,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:51,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:52,145 INFO L124 PetriNetUnfolderBase]: 531/1054 cut-off events. [2025-03-13 21:54:52,145 INFO L125 PetriNetUnfolderBase]: For 1926/1926 co-relation queries the response was YES. [2025-03-13 21:54:52,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 1054 events. 531/1054 cut-off events. For 1926/1926 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5569 event pairs, 93 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 2112. Up to 245 conditions per place. [2025-03-13 21:54:52,152 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 129 selfloop transitions, 22 changer transitions 0/157 dead transitions. [2025-03-13 21:54:52,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 157 transitions, 1142 flow [2025-03-13 21:54:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:54:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:54:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2025-03-13 21:54:52,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5435897435897435 [2025-03-13 21:54:52,154 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 231 flow. Second operand 13 states and 212 transitions. [2025-03-13 21:54:52,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 157 transitions, 1142 flow [2025-03-13 21:54:52,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 157 transitions, 1123 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:52,164 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 356 flow [2025-03-13 21:54:52,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2025-03-13 21:54:52,169 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2025-03-13 21:54:52,169 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 356 flow [2025-03-13 21:54:52,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 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) [2025-03-13 21:54:52,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:52,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:52,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:52,369 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,SelfDestructingSolverStorable3 [2025-03-13 21:54:52,370 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:52,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:52,370 INFO L85 PathProgramCache]: Analyzing trace with hash -832600784, now seen corresponding path program 1 times [2025-03-13 21:54:52,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613290745] [2025-03-13 21:54:52,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:52,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:54:52,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:52,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:52,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:52,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613290745] [2025-03-13 21:54:52,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613290745] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:52,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:52,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:54:52,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670563661] [2025-03-13 21:54:52,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:52,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:52,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:52,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:52,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:54:52,446 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:52,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2025-03-13 21:54:52,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:52,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:52,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:52,667 INFO L124 PetriNetUnfolderBase]: 555/1112 cut-off events. [2025-03-13 21:54:52,667 INFO L125 PetriNetUnfolderBase]: For 3881/3881 co-relation queries the response was YES. [2025-03-13 21:54:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 1112 events. 555/1112 cut-off events. For 3881/3881 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6005 event pairs, 121 based on Foata normal form. 16/1068 useless extension candidates. Maximal degree in co-relation 2799. Up to 421 conditions per place. [2025-03-13 21:54:52,678 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 62 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2025-03-13 21:54:52,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 707 flow [2025-03-13 21:54:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:54:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:54:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2025-03-13 21:54:52,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-13 21:54:52,680 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 356 flow. Second operand 6 states and 93 transitions. [2025-03-13 21:54:52,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 707 flow [2025-03-13 21:54:52,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 629 flow, removed 27 selfloop flow, removed 5 redundant places. [2025-03-13 21:54:52,695 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 344 flow [2025-03-13 21:54:52,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2025-03-13 21:54:52,697 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2025-03-13 21:54:52,697 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 344 flow [2025-03-13 21:54:52,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2025-03-13 21:54:52,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:52,697 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:52,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-13 21:54:52,697 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:52,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1489036570, now seen corresponding path program 1 times [2025-03-13 21:54:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727902628] [2025-03-13 21:54:52,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:52,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:54:52,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:52,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:52,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:52,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:52,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727902628] [2025-03-13 21:54:52,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727902628] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:52,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:52,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:54:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699541633] [2025-03-13 21:54:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:52,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:52,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:52,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:54:52,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:52,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2025-03-13 21:54:52,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:52,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:52,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:52,939 INFO L124 PetriNetUnfolderBase]: 580/1166 cut-off events. [2025-03-13 21:54:52,940 INFO L125 PetriNetUnfolderBase]: For 4158/4158 co-relation queries the response was YES. [2025-03-13 21:54:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 1166 events. 580/1166 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6445 event pairs, 117 based on Foata normal form. 17/1117 useless extension candidates. Maximal degree in co-relation 3784. Up to 457 conditions per place. [2025-03-13 21:54:52,948 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 67 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2025-03-13 21:54:52,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 705 flow [2025-03-13 21:54:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:54:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:54:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2025-03-13 21:54:52,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2025-03-13 21:54:52,949 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 344 flow. Second operand 6 states and 97 transitions. [2025-03-13 21:54:52,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 705 flow [2025-03-13 21:54:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 675 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:52,958 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 363 flow [2025-03-13 21:54:52,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2025-03-13 21:54:52,960 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2025-03-13 21:54:52,960 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 363 flow [2025-03-13 21:54:52,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2025-03-13 21:54:52,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:52,960 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:52,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:54:52,960 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:52,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1692632967, now seen corresponding path program 2 times [2025-03-13 21:54:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:52,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827258666] [2025-03-13 21:54:52,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:52,968 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-13 21:54:52,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:52,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:52,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:53,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:53,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827258666] [2025-03-13 21:54:53,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827258666] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:53,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623444234] [2025-03-13 21:54:53,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:53,066 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) [2025-03-13 21:54:53,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:54:53,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-13 21:54:53,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:53,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:53,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:53,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:54:53,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:53,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623444234] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:53,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-13 21:54:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832498494] [2025-03-13 21:54:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:53,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:54:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:53,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:54:53,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:54:53,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:53,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 363 flow. Second operand has 23 states, 23 states have (on average 9.130434782608695) internal successors, (210), 23 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) [2025-03-13 21:54:53,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:53,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:53,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:53,888 INFO L124 PetriNetUnfolderBase]: 934/1778 cut-off events. [2025-03-13 21:54:53,888 INFO L125 PetriNetUnfolderBase]: For 14079/14079 co-relation queries the response was YES. [2025-03-13 21:54:53,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6625 conditions, 1778 events. 934/1778 cut-off events. For 14079/14079 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9544 event pairs, 93 based on Foata normal form. 240/1948 useless extension candidates. Maximal degree in co-relation 6346. Up to 351 conditions per place. [2025-03-13 21:54:53,897 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 270 selfloop transitions, 40 changer transitions 0/316 dead transitions. [2025-03-13 21:54:53,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 316 transitions, 2588 flow [2025-03-13 21:54:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-13 21:54:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-13 21:54:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 413 transitions. [2025-03-13 21:54:53,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5506666666666666 [2025-03-13 21:54:53,901 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 363 flow. Second operand 25 states and 413 transitions. [2025-03-13 21:54:53,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 316 transitions, 2588 flow [2025-03-13 21:54:53,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 316 transitions, 2457 flow, removed 55 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:53,924 INFO L231 Difference]: Finished difference. Result has 106 places, 74 transitions, 650 flow [2025-03-13 21:54:53,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=650, PETRI_PLACES=106, PETRI_TRANSITIONS=74} [2025-03-13 21:54:53,925 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2025-03-13 21:54:53,925 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 74 transitions, 650 flow [2025-03-13 21:54:53,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.130434782608695) internal successors, (210), 23 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) [2025-03-13 21:54:53,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:53,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:53,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:54,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:54,126 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:54,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -171818440, now seen corresponding path program 1 times [2025-03-13 21:54:54,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:54,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845635704] [2025-03-13 21:54:54,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:54,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:54,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:54,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:54,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845635704] [2025-03-13 21:54:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845635704] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826152392] [2025-03-13 21:54:54,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:54,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:54,187 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) [2025-03-13 21:54:54,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:54:54,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:54,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:54,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:54,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:54,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-13 21:54:54,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826152392] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:54,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:54:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067612340] [2025-03-13 21:54:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:54,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:54:54,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:54,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:54:54,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:54:54,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:54,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 74 transitions, 650 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2025-03-13 21:54:54,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:54,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:54,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:54,562 INFO L124 PetriNetUnfolderBase]: 1006/1922 cut-off events. [2025-03-13 21:54:54,562 INFO L125 PetriNetUnfolderBase]: For 22234/22234 co-relation queries the response was YES. [2025-03-13 21:54:54,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8322 conditions, 1922 events. 1006/1922 cut-off events. For 22234/22234 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10724 event pairs, 202 based on Foata normal form. 48/1892 useless extension candidates. Maximal degree in co-relation 7777. Up to 746 conditions per place. [2025-03-13 21:54:54,574 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 108 selfloop transitions, 24 changer transitions 0/138 dead transitions. [2025-03-13 21:54:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 138 transitions, 1426 flow [2025-03-13 21:54:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:54:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:54:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2025-03-13 21:54:54,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2025-03-13 21:54:54,576 INFO L175 Difference]: Start difference. First operand has 106 places, 74 transitions, 650 flow. Second operand 9 states and 137 transitions. [2025-03-13 21:54:54,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 138 transitions, 1426 flow [2025-03-13 21:54:54,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 138 transitions, 1186 flow, removed 84 selfloop flow, removed 12 redundant places. [2025-03-13 21:54:54,612 INFO L231 Difference]: Finished difference. Result has 105 places, 77 transitions, 574 flow [2025-03-13 21:54:54,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=574, PETRI_PLACES=105, PETRI_TRANSITIONS=77} [2025-03-13 21:54:54,613 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2025-03-13 21:54:54,613 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 77 transitions, 574 flow [2025-03-13 21:54:54,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2025-03-13 21:54:54,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:54,613 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:54,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:54,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:54,814 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:54,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1509423180, now seen corresponding path program 1 times [2025-03-13 21:54:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493053176] [2025-03-13 21:54:54,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:54,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:54,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:54,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:54,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493053176] [2025-03-13 21:54:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493053176] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994231956] [2025-03-13 21:54:54,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:54,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:54,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:54,866 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) [2025-03-13 21:54:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:54:54,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:54,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:54,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:54,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:54,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-13 21:54:54,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994231956] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:54,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:54:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041406986] [2025-03-13 21:54:54,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:54,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:54:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:54,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:54:54,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:54:54,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:54,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 77 transitions, 574 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2025-03-13 21:54:54,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:54,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:54,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:55,255 INFO L124 PetriNetUnfolderBase]: 1135/2126 cut-off events. [2025-03-13 21:54:55,255 INFO L125 PetriNetUnfolderBase]: For 19339/19339 co-relation queries the response was YES. [2025-03-13 21:54:55,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8272 conditions, 2126 events. 1135/2126 cut-off events. For 19339/19339 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11857 event pairs, 114 based on Foata normal form. 87/2141 useless extension candidates. Maximal degree in co-relation 7974. Up to 819 conditions per place. [2025-03-13 21:54:55,268 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 136 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2025-03-13 21:54:55,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 166 transitions, 1535 flow [2025-03-13 21:54:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:54:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:54:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2025-03-13 21:54:55,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-03-13 21:54:55,270 INFO L175 Difference]: Start difference. First operand has 105 places, 77 transitions, 574 flow. Second operand 9 states and 144 transitions. [2025-03-13 21:54:55,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 166 transitions, 1535 flow [2025-03-13 21:54:55,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1457 flow, removed 15 selfloop flow, removed 5 redundant places. [2025-03-13 21:54:55,306 INFO L231 Difference]: Finished difference. Result has 111 places, 80 transitions, 594 flow [2025-03-13 21:54:55,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=111, PETRI_TRANSITIONS=80} [2025-03-13 21:54:55,307 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2025-03-13 21:54:55,307 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 80 transitions, 594 flow [2025-03-13 21:54:55,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2025-03-13 21:54:55,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:55,307 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:55,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-13 21:54:55,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:55,512 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:55,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 356950695, now seen corresponding path program 2 times [2025-03-13 21:54:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47282901] [2025-03-13 21:54:55,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:55,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-13 21:54:55,518 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:54:55,518 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:55,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:55,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47282901] [2025-03-13 21:54:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47282901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001586961] [2025-03-13 21:54:55,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:55,594 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) [2025-03-13 21:54:55,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:54:55,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-13 21:54:55,631 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:54:55,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:55,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:55,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:54:55,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:55,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:55,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001586961] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:55,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:55,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-13 21:54:55,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803562024] [2025-03-13 21:54:55,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:55,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:54:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:55,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:54:55,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:54:55,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:55,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 80 transitions, 594 flow. Second operand has 23 states, 23 states have (on average 9.304347826086957) internal successors, (214), 23 states have internal predecessors, (214), 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) [2025-03-13 21:54:55,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:55,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:55,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:56,483 INFO L124 PetriNetUnfolderBase]: 1759/3257 cut-off events. [2025-03-13 21:54:56,483 INFO L125 PetriNetUnfolderBase]: For 55632/55632 co-relation queries the response was YES. [2025-03-13 21:54:56,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13328 conditions, 3257 events. 1759/3257 cut-off events. For 55632/55632 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 18821 event pairs, 279 based on Foata normal form. 420/3574 useless extension candidates. Maximal degree in co-relation 10848. Up to 697 conditions per place. [2025-03-13 21:54:56,501 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 441 selfloop transitions, 46 changer transitions 0/493 dead transitions. [2025-03-13 21:54:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 493 transitions, 4418 flow [2025-03-13 21:54:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-13 21:54:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-13 21:54:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 410 transitions. [2025-03-13 21:54:56,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-03-13 21:54:56,503 INFO L175 Difference]: Start difference. First operand has 111 places, 80 transitions, 594 flow. Second operand 25 states and 410 transitions. [2025-03-13 21:54:56,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 493 transitions, 4418 flow [2025-03-13 21:54:56,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 493 transitions, 4308 flow, removed 15 selfloop flow, removed 5 redundant places. [2025-03-13 21:54:56,565 INFO L231 Difference]: Finished difference. Result has 142 places, 98 transitions, 858 flow [2025-03-13 21:54:56,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=858, PETRI_PLACES=142, PETRI_TRANSITIONS=98} [2025-03-13 21:54:56,566 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2025-03-13 21:54:56,566 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 98 transitions, 858 flow [2025-03-13 21:54:56,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.304347826086957) internal successors, (214), 23 states have internal predecessors, (214), 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) [2025-03-13 21:54:56,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:56,566 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:56,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:56,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:56,770 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:56,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1551395664, now seen corresponding path program 2 times [2025-03-13 21:54:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776126014] [2025-03-13 21:54:56,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:56,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:56,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-13 21:54:56,782 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-13 21:54:56,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:56,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776126014] [2025-03-13 21:54:56,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776126014] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098134860] [2025-03-13 21:54:56,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:56,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:56,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:56,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:54:56,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:54:56,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-13 21:54:56,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-13 21:54:56,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:56,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:56,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:54:56,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:56,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:57,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098134860] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:57,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:57,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-13 21:54:57,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232500214] [2025-03-13 21:54:57,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:57,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:54:57,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:57,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:54:57,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:54:57,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:57,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 98 transitions, 858 flow. Second operand has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2025-03-13 21:54:57,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:57,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:57,505 INFO L124 PetriNetUnfolderBase]: 2011/3641 cut-off events. [2025-03-13 21:54:57,505 INFO L125 PetriNetUnfolderBase]: For 88268/88268 co-relation queries the response was YES. [2025-03-13 21:54:57,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17399 conditions, 3641 events. 2011/3641 cut-off events. For 88268/88268 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 21069 event pairs, 234 based on Foata normal form. 168/3718 useless extension candidates. Maximal degree in co-relation 13509. Up to 1406 conditions per place. [2025-03-13 21:54:57,524 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 237 selfloop transitions, 36 changer transitions 0/279 dead transitions. [2025-03-13 21:54:57,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 279 transitions, 3392 flow [2025-03-13 21:54:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:54:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:54:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 224 transitions. [2025-03-13 21:54:57,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49777777777777776 [2025-03-13 21:54:57,526 INFO L175 Difference]: Start difference. First operand has 142 places, 98 transitions, 858 flow. Second operand 15 states and 224 transitions. [2025-03-13 21:54:57,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 279 transitions, 3392 flow [2025-03-13 21:54:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 279 transitions, 2600 flow, removed 312 selfloop flow, removed 12 redundant places. [2025-03-13 21:54:57,647 INFO L231 Difference]: Finished difference. Result has 150 places, 104 transitions, 836 flow [2025-03-13 21:54:57,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=836, PETRI_PLACES=150, PETRI_TRANSITIONS=104} [2025-03-13 21:54:57,647 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2025-03-13 21:54:57,647 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 104 transitions, 836 flow [2025-03-13 21:54:57,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2025-03-13 21:54:57,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:57,648 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:57,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:57,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:57,848 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:57,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:57,849 INFO L85 PathProgramCache]: Analyzing trace with hash 849220070, now seen corresponding path program 2 times [2025-03-13 21:54:57,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:57,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494471966] [2025-03-13 21:54:57,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:57,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:57,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-13 21:54:57,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-13 21:54:57,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:57,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:57,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494471966] [2025-03-13 21:54:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494471966] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717716113] [2025-03-13 21:54:57,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:57,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:57,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:54:57,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:54:57,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-13 21:54:57,967 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-13 21:54:57,967 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:57,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:57,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:54:57,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:58,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717716113] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:58,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-13 21:54:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085792694] [2025-03-13 21:54:58,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:58,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:54:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:58,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:54:58,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:54:58,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:54:58,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 104 transitions, 836 flow. Second operand has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2025-03-13 21:54:58,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:58,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:54:58,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:58,640 INFO L124 PetriNetUnfolderBase]: 2269/4061 cut-off events. [2025-03-13 21:54:58,640 INFO L125 PetriNetUnfolderBase]: For 104835/104835 co-relation queries the response was YES. [2025-03-13 21:54:58,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17812 conditions, 4061 events. 2269/4061 cut-off events. For 104835/104835 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 23634 event pairs, 275 based on Foata normal form. 174/4150 useless extension candidates. Maximal degree in co-relation 17481. Up to 1821 conditions per place. [2025-03-13 21:54:58,662 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 256 selfloop transitions, 36 changer transitions 0/298 dead transitions. [2025-03-13 21:54:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 2985 flow [2025-03-13 21:54:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:54:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:54:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 237 transitions. [2025-03-13 21:54:58,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2025-03-13 21:54:58,664 INFO L175 Difference]: Start difference. First operand has 150 places, 104 transitions, 836 flow. Second operand 15 states and 237 transitions. [2025-03-13 21:54:58,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 2985 flow [2025-03-13 21:54:58,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 298 transitions, 2845 flow, removed 37 selfloop flow, removed 8 redundant places. [2025-03-13 21:54:58,833 INFO L231 Difference]: Finished difference. Result has 162 places, 110 transitions, 872 flow [2025-03-13 21:54:58,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=872, PETRI_PLACES=162, PETRI_TRANSITIONS=110} [2025-03-13 21:54:58,834 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2025-03-13 21:54:58,834 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 110 transitions, 872 flow [2025-03-13 21:54:58,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2025-03-13 21:54:58,834 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:58,834 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:58,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:59,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-13 21:54:59,035 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:54:59,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1243535751, now seen corresponding path program 3 times [2025-03-13 21:54:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540154756] [2025-03-13 21:54:59,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:54:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:59,038 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 6 equivalence classes. [2025-03-13 21:54:59,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 10 of 18 statements. [2025-03-13 21:54:59,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:54:59,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:54:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540154756] [2025-03-13 21:54:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540154756] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306410323] [2025-03-13 21:54:59,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:54:59,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:59,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:54:59,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:54:59,136 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 6 equivalence classes. [2025-03-13 21:54:59,144 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 10 of 18 statements. [2025-03-13 21:54:59,144 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:54:59,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:59,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:54:59,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:54:59,175 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:54:59,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306410323] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:54:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-03-13 21:54:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616309986] [2025-03-13 21:54:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:59,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:59,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:59,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:54:59,182 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2025-03-13 21:54:59,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 110 transitions, 872 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2025-03-13 21:54:59,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:59,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2025-03-13 21:54:59,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:59,626 INFO L124 PetriNetUnfolderBase]: 2451/4403 cut-off events. [2025-03-13 21:54:59,626 INFO L125 PetriNetUnfolderBase]: For 98102/98102 co-relation queries the response was YES. [2025-03-13 21:54:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19694 conditions, 4403 events. 2451/4403 cut-off events. For 98102/98102 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 25928 event pairs, 650 based on Foata normal form. 82/4432 useless extension candidates. Maximal degree in co-relation 19027. Up to 1557 conditions per place. [2025-03-13 21:54:59,651 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 210 selfloop transitions, 32 changer transitions 7/254 dead transitions. [2025-03-13 21:54:59,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 254 transitions, 2737 flow [2025-03-13 21:54:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:54:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:54:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2025-03-13 21:54:59,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2025-03-13 21:54:59,653 INFO L175 Difference]: Start difference. First operand has 162 places, 110 transitions, 872 flow. Second operand 9 states and 146 transitions. [2025-03-13 21:54:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 254 transitions, 2737 flow [2025-03-13 21:54:59,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 254 transitions, 2347 flow, removed 148 selfloop flow, removed 8 redundant places. [2025-03-13 21:54:59,804 INFO L231 Difference]: Finished difference. Result has 164 places, 116 transitions, 964 flow [2025-03-13 21:54:59,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=164, PETRI_TRANSITIONS=116} [2025-03-13 21:54:59,805 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2025-03-13 21:54:59,805 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 116 transitions, 964 flow [2025-03-13 21:54:59,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2025-03-13 21:54:59,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:59,805 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:59,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:00,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-13 21:55:00,007 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:00,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -622120857, now seen corresponding path program 3 times [2025-03-13 21:55:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875934197] [2025-03-13 21:55:00,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:00,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 6 equivalence classes. [2025-03-13 21:55:00,014 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 20 statements. [2025-03-13 21:55:00,014 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:55:00,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:55:00,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:00,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875934197] [2025-03-13 21:55:00,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875934197] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:00,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533687710] [2025-03-13 21:55:00,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:00,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:00,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:00,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:55:00,121 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 6 equivalence classes. [2025-03-13 21:55:00,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 20 statements. [2025-03-13 21:55:00,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:55:00,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:00,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:55:00,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:55:00,164 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:55:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533687710] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:55:00,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:55:00,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-03-13 21:55:00,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021670127] [2025-03-13 21:55:00,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:55:00,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:55:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:00,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:55:00,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:55:00,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2025-03-13 21:55:00,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 116 transitions, 964 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2025-03-13 21:55:00,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:00,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2025-03-13 21:55:00,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:00,574 INFO L124 PetriNetUnfolderBase]: 2581/4529 cut-off events. [2025-03-13 21:55:00,574 INFO L125 PetriNetUnfolderBase]: For 116732/116732 co-relation queries the response was YES. [2025-03-13 21:55:00,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20556 conditions, 4529 events. 2581/4529 cut-off events. For 116732/116732 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 25933 event pairs, 680 based on Foata normal form. 89/4616 useless extension candidates. Maximal degree in co-relation 19253. Up to 1677 conditions per place. [2025-03-13 21:55:00,592 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 104 selfloop transitions, 7 changer transitions 145/261 dead transitions. [2025-03-13 21:55:00,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 261 transitions, 2776 flow [2025-03-13 21:55:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:55:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:55:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2025-03-13 21:55:00,593 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2025-03-13 21:55:00,593 INFO L175 Difference]: Start difference. First operand has 164 places, 116 transitions, 964 flow. Second operand 9 states and 143 transitions. [2025-03-13 21:55:00,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 261 transitions, 2776 flow [2025-03-13 21:55:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 2322 flow, removed 220 selfloop flow, removed 2 redundant places. [2025-03-13 21:55:00,774 INFO L231 Difference]: Finished difference. Result has 174 places, 72 transitions, 519 flow [2025-03-13 21:55:00,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=519, PETRI_PLACES=174, PETRI_TRANSITIONS=72} [2025-03-13 21:55:00,774 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2025-03-13 21:55:00,775 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 72 transitions, 519 flow [2025-03-13 21:55:00,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2025-03-13 21:55:00,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:00,775 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:00,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:00,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-13 21:55:00,978 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:00,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash 665101296, now seen corresponding path program 3 times [2025-03-13 21:55:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:00,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515414845] [2025-03-13 21:55:00,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:00,981 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-03-13 21:55:00,989 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:55:00,989 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:55:00,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515414845] [2025-03-13 21:55:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515414845] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202581463] [2025-03-13 21:55:01,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:01,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:01,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:55:01,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-03-13 21:55:01,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:55:01,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:55:01,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:01,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-13 21:55:01,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:01,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202581463] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2025-03-13 21:55:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589323574] [2025-03-13 21:55:01,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:01,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-13 21:55:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:01,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-13 21:55:01,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1075, Unknown=0, NotChecked=0, Total=1640 [2025-03-13 21:55:01,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 72 transitions, 519 flow. Second operand has 41 states, 41 states have (on average 9.268292682926829) internal successors, (380), 41 states have internal predecessors, (380), 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) [2025-03-13 21:55:01,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:01,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:01,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:02,176 INFO L124 PetriNetUnfolderBase]: 1771/3205 cut-off events. [2025-03-13 21:55:02,176 INFO L125 PetriNetUnfolderBase]: For 67140/67140 co-relation queries the response was YES. [2025-03-13 21:55:02,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14164 conditions, 3205 events. 1771/3205 cut-off events. For 67140/67140 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16184 event pairs, 421 based on Foata normal form. 336/3541 useless extension candidates. Maximal degree in co-relation 14092. Up to 1020 conditions per place. [2025-03-13 21:55:02,195 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 385 selfloop transitions, 28 changer transitions 15/434 dead transitions. [2025-03-13 21:55:02,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 434 transitions, 4558 flow [2025-03-13 21:55:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:55:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:55:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 395 transitions. [2025-03-13 21:55:02,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2025-03-13 21:55:02,197 INFO L175 Difference]: Start difference. First operand has 174 places, 72 transitions, 519 flow. Second operand 27 states and 395 transitions. [2025-03-13 21:55:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 434 transitions, 4558 flow [2025-03-13 21:55:02,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 434 transitions, 3461 flow, removed 524 selfloop flow, removed 16 redundant places. [2025-03-13 21:55:02,242 INFO L231 Difference]: Finished difference. Result has 171 places, 84 transitions, 644 flow [2025-03-13 21:55:02,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=644, PETRI_PLACES=171, PETRI_TRANSITIONS=84} [2025-03-13 21:55:02,242 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2025-03-13 21:55:02,242 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 84 transitions, 644 flow [2025-03-13 21:55:02,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 9.268292682926829) internal successors, (380), 41 states have internal predecessors, (380), 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) [2025-03-13 21:55:02,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:02,243 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:02,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:02,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-13 21:55:02,443 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:02,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash 861664358, now seen corresponding path program 3 times [2025-03-13 21:55:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:02,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255904970] [2025-03-13 21:55:02,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:02,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:02,446 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-03-13 21:55:02,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:55:02,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:55:02,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:02,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255904970] [2025-03-13 21:55:02,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255904970] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:02,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954317986] [2025-03-13 21:55:02,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:55:02,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:02,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:02,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:55:02,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-03-13 21:55:02,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:55:02,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:55:02,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:02,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-13 21:55:02,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:02,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954317986] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:02,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:02,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2025-03-13 21:55:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821752938] [2025-03-13 21:55:02,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:02,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-13 21:55:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:02,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-13 21:55:02,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1075, Unknown=0, NotChecked=0, Total=1640 [2025-03-13 21:55:02,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:02,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 84 transitions, 644 flow. Second operand has 41 states, 41 states have (on average 9.268292682926829) internal successors, (380), 41 states have internal predecessors, (380), 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) [2025-03-13 21:55:02,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:02,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:02,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:03,714 INFO L124 PetriNetUnfolderBase]: 2287/4074 cut-off events. [2025-03-13 21:55:03,714 INFO L125 PetriNetUnfolderBase]: For 36013/36013 co-relation queries the response was YES. [2025-03-13 21:55:03,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17035 conditions, 4074 events. 2287/4074 cut-off events. For 36013/36013 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 20957 event pairs, 693 based on Foata normal form. 348/4422 useless extension candidates. Maximal degree in co-relation 16965. Up to 1836 conditions per place. [2025-03-13 21:55:03,737 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 423 selfloop transitions, 28 changer transitions 14/471 dead transitions. [2025-03-13 21:55:03,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 471 transitions, 3778 flow [2025-03-13 21:55:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:55:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:55:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 420 transitions. [2025-03-13 21:55:03,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2025-03-13 21:55:03,738 INFO L175 Difference]: Start difference. First operand has 171 places, 84 transitions, 644 flow. Second operand 27 states and 420 transitions. [2025-03-13 21:55:03,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 471 transitions, 3778 flow [2025-03-13 21:55:03,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 471 transitions, 3618 flow, removed 61 selfloop flow, removed 14 redundant places. [2025-03-13 21:55:03,808 INFO L231 Difference]: Finished difference. Result has 195 places, 96 transitions, 716 flow [2025-03-13 21:55:03,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=716, PETRI_PLACES=195, PETRI_TRANSITIONS=96} [2025-03-13 21:55:03,808 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2025-03-13 21:55:03,808 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 96 transitions, 716 flow [2025-03-13 21:55:03,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 9.268292682926829) internal successors, (380), 41 states have internal predecessors, (380), 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) [2025-03-13 21:55:03,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:03,808 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:03,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-13 21:55:04,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-13 21:55:04,010 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:04,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1778728026, now seen corresponding path program 4 times [2025-03-13 21:55:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:04,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382622376] [2025-03-13 21:55:04,010 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:55:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:04,015 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-13 21:55:04,023 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-13 21:55:04,026 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:55:04,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382622376] [2025-03-13 21:55:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382622376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:04,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878537084] [2025-03-13 21:55:04,417 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:55:04,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:04,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:04,419 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:55:04,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-13 21:55:04,459 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-13 21:55:04,460 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:55:04,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:04,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-13 21:55:04,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:04,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878537084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:05,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 76 [2025-03-13 21:55:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443883891] [2025-03-13 21:55:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:05,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2025-03-13 21:55:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:05,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2025-03-13 21:55:05,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2247, Invalid=3605, Unknown=0, NotChecked=0, Total=5852 [2025-03-13 21:55:05,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:05,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 96 transitions, 716 flow. Second operand has 77 states, 77 states have (on average 9.142857142857142) internal successors, (704), 77 states have internal predecessors, (704), 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) [2025-03-13 21:55:05,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:05,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:05,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:07,248 INFO L124 PetriNetUnfolderBase]: 3295/5752 cut-off events. [2025-03-13 21:55:07,248 INFO L125 PetriNetUnfolderBase]: For 187596/187596 co-relation queries the response was YES. [2025-03-13 21:55:07,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23864 conditions, 5752 events. 3295/5752 cut-off events. For 187596/187596 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28377 event pairs, 745 based on Foata normal form. 672/6424 useless extension candidates. Maximal degree in co-relation 23782. Up to 1884 conditions per place. [2025-03-13 21:55:07,285 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 757 selfloop transitions, 52 changer transitions 15/830 dead transitions. [2025-03-13 21:55:07,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 830 transitions, 6813 flow [2025-03-13 21:55:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-13 21:55:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-03-13 21:55:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 743 transitions. [2025-03-13 21:55:07,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48562091503267973 [2025-03-13 21:55:07,288 INFO L175 Difference]: Start difference. First operand has 195 places, 96 transitions, 716 flow. Second operand 51 states and 743 transitions. [2025-03-13 21:55:07,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 830 transitions, 6813 flow [2025-03-13 21:55:07,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 830 transitions, 6653 flow, removed 61 selfloop flow, removed 14 redundant places. [2025-03-13 21:55:07,378 INFO L231 Difference]: Finished difference. Result has 255 places, 120 transitions, 1004 flow [2025-03-13 21:55:07,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1004, PETRI_PLACES=255, PETRI_TRANSITIONS=120} [2025-03-13 21:55:07,378 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 226 predicate places. [2025-03-13 21:55:07,378 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 120 transitions, 1004 flow [2025-03-13 21:55:07,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 9.142857142857142) internal successors, (704), 77 states have internal predecessors, (704), 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) [2025-03-13 21:55:07,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:07,379 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:07,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:07,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-13 21:55:07,579 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:07,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1815213468, now seen corresponding path program 4 times [2025-03-13 21:55:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950427132] [2025-03-13 21:55:07,580 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:55:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:07,583 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-13 21:55:07,587 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-13 21:55:07,587 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:55:07,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:07,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:07,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950427132] [2025-03-13 21:55:07,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950427132] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:07,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147400753] [2025-03-13 21:55:07,976 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:55:07,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:07,978 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:07,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-13 21:55:08,010 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-13 21:55:08,020 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-13 21:55:08,020 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:55:08,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:08,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-13 21:55:08,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:08,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:08,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147400753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:08,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:08,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 77 [2025-03-13 21:55:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497643183] [2025-03-13 21:55:08,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:08,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-03-13 21:55:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:08,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-03-13 21:55:08,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2253, Invalid=3753, Unknown=0, NotChecked=0, Total=6006 [2025-03-13 21:55:08,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:08,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 120 transitions, 1004 flow. Second operand has 78 states, 78 states have (on average 9.166666666666666) internal successors, (715), 78 states have internal predecessors, (715), 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) [2025-03-13 21:55:08,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:08,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:08,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:11,033 INFO L124 PetriNetUnfolderBase]: 4327/7482 cut-off events. [2025-03-13 21:55:11,033 INFO L125 PetriNetUnfolderBase]: For 219479/219479 co-relation queries the response was YES. [2025-03-13 21:55:11,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32071 conditions, 7482 events. 4327/7482 cut-off events. For 219479/219479 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 38123 event pairs, 1317 based on Foata normal form. 696/8178 useless extension candidates. Maximal degree in co-relation 31965. Up to 3516 conditions per place. [2025-03-13 21:55:11,076 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 831 selfloop transitions, 52 changer transitions 14/903 dead transitions. [2025-03-13 21:55:11,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 903 transitions, 7258 flow [2025-03-13 21:55:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-13 21:55:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-03-13 21:55:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 792 transitions. [2025-03-13 21:55:11,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2025-03-13 21:55:11,078 INFO L175 Difference]: Start difference. First operand has 255 places, 120 transitions, 1004 flow. Second operand 51 states and 792 transitions. [2025-03-13 21:55:11,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 903 transitions, 7258 flow [2025-03-13 21:55:11,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 903 transitions, 6954 flow, removed 121 selfloop flow, removed 26 redundant places. [2025-03-13 21:55:11,258 INFO L231 Difference]: Finished difference. Result has 303 places, 144 transitions, 1148 flow [2025-03-13 21:55:11,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1148, PETRI_PLACES=303, PETRI_TRANSITIONS=144} [2025-03-13 21:55:11,258 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 274 predicate places. [2025-03-13 21:55:11,258 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 144 transitions, 1148 flow [2025-03-13 21:55:11,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 9.166666666666666) internal successors, (715), 78 states have internal predecessors, (715), 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) [2025-03-13 21:55:11,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:11,259 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:11,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:11,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:11,460 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:11,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -492020058, now seen corresponding path program 5 times [2025-03-13 21:55:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:11,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7802703] [2025-03-13 21:55:11,460 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:55:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:11,465 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 24 equivalence classes. [2025-03-13 21:55:11,480 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 58 of 58 statements. [2025-03-13 21:55:11,480 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-13 21:55:11,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:12,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7802703] [2025-03-13 21:55:12,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7802703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303699264] [2025-03-13 21:55:12,563 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:55:12,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:12,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:12,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-13 21:55:12,596 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 24 equivalence classes. [2025-03-13 21:55:12,616 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 58 of 58 statements. [2025-03-13 21:55:12,616 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-13 21:55:12,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:12,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-13 21:55:12,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:13,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:15,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303699264] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:15,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:15,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 148 [2025-03-13 21:55:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288720222] [2025-03-13 21:55:15,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:15,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2025-03-13 21:55:15,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:15,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2025-03-13 21:55:15,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9087, Invalid=12965, Unknown=0, NotChecked=0, Total=22052 [2025-03-13 21:55:15,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:15,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 144 transitions, 1148 flow. Second operand has 149 states, 149 states have (on average 9.073825503355705) internal successors, (1352), 149 states have internal predecessors, (1352), 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) [2025-03-13 21:55:15,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:15,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:15,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:22,197 INFO L124 PetriNetUnfolderBase]: 6343/10840 cut-off events. [2025-03-13 21:55:22,198 INFO L125 PetriNetUnfolderBase]: For 1486186/1486186 co-relation queries the response was YES. [2025-03-13 21:55:22,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45728 conditions, 10840 events. 6343/10840 cut-off events. For 1486186/1486186 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 52542 event pairs, 1393 based on Foata normal form. 1344/12184 useless extension candidates. Maximal degree in co-relation 45598. Up to 3612 conditions per place. [2025-03-13 21:55:22,283 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 1501 selfloop transitions, 100 changer transitions 15/1622 dead transitions. [2025-03-13 21:55:22,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1622 transitions, 13341 flow [2025-03-13 21:55:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2025-03-13 21:55:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2025-03-13 21:55:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 1439 transitions. [2025-03-13 21:55:22,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4845117845117845 [2025-03-13 21:55:22,285 INFO L175 Difference]: Start difference. First operand has 303 places, 144 transitions, 1148 flow. Second operand 99 states and 1439 transitions. [2025-03-13 21:55:22,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1622 transitions, 13341 flow [2025-03-13 21:55:22,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1622 transitions, 13037 flow, removed 121 selfloop flow, removed 26 redundant places. [2025-03-13 21:55:22,693 INFO L231 Difference]: Finished difference. Result has 423 places, 192 transitions, 1724 flow [2025-03-13 21:55:22,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=1724, PETRI_PLACES=423, PETRI_TRANSITIONS=192} [2025-03-13 21:55:22,693 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 394 predicate places. [2025-03-13 21:55:22,693 INFO L471 AbstractCegarLoop]: Abstraction has has 423 places, 192 transitions, 1724 flow [2025-03-13 21:55:22,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 9.073825503355705) internal successors, (1352), 149 states have internal predecessors, (1352), 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) [2025-03-13 21:55:22,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:22,694 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:22,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:22,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:22,894 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:22,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1361437542, now seen corresponding path program 5 times [2025-03-13 21:55:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:22,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395695518] [2025-03-13 21:55:22,895 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:55:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:22,899 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 24 equivalence classes. [2025-03-13 21:55:22,913 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 58 of 58 statements. [2025-03-13 21:55:22,913 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-13 21:55:22,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395695518] [2025-03-13 21:55:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395695518] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165099605] [2025-03-13 21:55:23,991 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:55:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:23,992 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:23,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-13 21:55:24,023 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 24 equivalence classes. [2025-03-13 21:55:24,041 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 58 of 58 statements. [2025-03-13 21:55:24,041 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-13 21:55:24,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:24,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-13 21:55:24,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:24,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165099605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:26,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:26,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 148 [2025-03-13 21:55:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438046205] [2025-03-13 21:55:26,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:26,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2025-03-13 21:55:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:26,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2025-03-13 21:55:26,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9087, Invalid=12965, Unknown=0, NotChecked=0, Total=22052 [2025-03-13 21:55:26,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:26,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 192 transitions, 1724 flow. Second operand has 149 states, 149 states have (on average 9.073825503355705) internal successors, (1352), 149 states have internal predecessors, (1352), 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) [2025-03-13 21:55:26,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:26,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:26,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:34,661 INFO L124 PetriNetUnfolderBase]: 8407/14298 cut-off events. [2025-03-13 21:55:34,661 INFO L125 PetriNetUnfolderBase]: For 1637099/1637099 co-relation queries the response was YES. [2025-03-13 21:55:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62143 conditions, 14298 events. 8407/14298 cut-off events. For 1637099/1637099 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 72419 event pairs, 2565 based on Foata normal form. 1392/15690 useless extension candidates. Maximal degree in co-relation 61965. Up to 6876 conditions per place. [2025-03-13 21:55:34,802 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 1647 selfloop transitions, 100 changer transitions 14/1767 dead transitions. [2025-03-13 21:55:34,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1767 transitions, 14218 flow [2025-03-13 21:55:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2025-03-13 21:55:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2025-03-13 21:55:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 1536 transitions. [2025-03-13 21:55:34,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5171717171717172 [2025-03-13 21:55:34,805 INFO L175 Difference]: Start difference. First operand has 423 places, 192 transitions, 1724 flow. Second operand 99 states and 1536 transitions. [2025-03-13 21:55:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1767 transitions, 14218 flow [2025-03-13 21:55:35,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1767 transitions, 13626 flow, removed 241 selfloop flow, removed 50 redundant places. [2025-03-13 21:55:35,865 INFO L231 Difference]: Finished difference. Result has 519 places, 240 transitions, 2012 flow [2025-03-13 21:55:35,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2012, PETRI_PLACES=519, PETRI_TRANSITIONS=240} [2025-03-13 21:55:35,865 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 490 predicate places. [2025-03-13 21:55:35,865 INFO L471 AbstractCegarLoop]: Abstraction has has 519 places, 240 transitions, 2012 flow [2025-03-13 21:55:35,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 9.073825503355705) internal successors, (1352), 149 states have internal predecessors, (1352), 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) [2025-03-13 21:55:35,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:35,866 INFO L206 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:35,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-13 21:55:36,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:36,067 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:36,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1041460058, now seen corresponding path program 6 times [2025-03-13 21:55:36,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:36,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276932676] [2025-03-13 21:55:36,068 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:55:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:36,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 48 equivalence classes. [2025-03-13 21:55:36,099 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 106 of 106 statements. [2025-03-13 21:55:36,100 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-03-13 21:55:36,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:55:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276932676] [2025-03-13 21:55:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276932676] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:55:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335670058] [2025-03-13 21:55:39,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:55:39,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:55:39,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:55:39,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-13 21:55:39,428 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 48 equivalence classes. [2025-03-13 21:55:39,471 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 106 of 106 statements. [2025-03-13 21:55:39,471 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-03-13 21:55:39,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:55:39,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-03-13 21:55:39,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:55:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:42,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:55:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:55:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335670058] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:55:45,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:55:45,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 203 [2025-03-13 21:55:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445899137] [2025-03-13 21:55:45,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:55:45,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2025-03-13 21:55:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:55:45,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2025-03-13 21:55:45,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=26265, Unknown=0, NotChecked=0, Total=41412 [2025-03-13 21:55:45,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:55:45,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 240 transitions, 2012 flow. Second operand has 204 states, 204 states have (on average 9.058823529411764) internal successors, (1848), 204 states have internal predecessors, (1848), 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) [2025-03-13 21:55:45,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:55:45,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:55:45,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:55:56,500 INFO L124 PetriNetUnfolderBase]: 8701/14786 cut-off events. [2025-03-13 21:55:56,500 INFO L125 PetriNetUnfolderBase]: For 1157486/1157486 co-relation queries the response was YES. [2025-03-13 21:55:56,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61866 conditions, 14786 events. 8701/14786 cut-off events. For 1157486/1157486 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 74749 event pairs, 2689 based on Foata normal form. 196/14982 useless extension candidates. Maximal degree in co-relation 61640. Up to 7068 conditions per place. [2025-03-13 21:55:56,670 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 1654 selfloop transitions, 107 changer transitions 15/1782 dead transitions. [2025-03-13 21:55:56,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1782 transitions, 14738 flow [2025-03-13 21:55:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2025-03-13 21:55:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2025-03-13 21:55:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 1496 transitions. [2025-03-13 21:55:56,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47044025157232705 [2025-03-13 21:55:56,673 INFO L175 Difference]: Start difference. First operand has 519 places, 240 transitions, 2012 flow. Second operand 106 states and 1496 transitions. [2025-03-13 21:55:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1782 transitions, 14738 flow [2025-03-13 21:55:58,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1782 transitions, 14146 flow, removed 241 selfloop flow, removed 50 redundant places. [2025-03-13 21:55:58,238 INFO L231 Difference]: Finished difference. Result has 581 places, 247 transitions, 1740 flow [2025-03-13 21:55:58,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=1740, PETRI_PLACES=581, PETRI_TRANSITIONS=247} [2025-03-13 21:55:58,238 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 552 predicate places. [2025-03-13 21:55:58,238 INFO L471 AbstractCegarLoop]: Abstraction has has 581 places, 247 transitions, 1740 flow [2025-03-13 21:55:58,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 9.058823529411764) internal successors, (1848), 204 states have internal predecessors, (1848), 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) [2025-03-13 21:55:58,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:55:58,239 INFO L206 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:55:58,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-13 21:55:58,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:55:58,440 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:55:58,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:55:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash -365987994, now seen corresponding path program 6 times [2025-03-13 21:55:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:55:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612439999] [2025-03-13 21:55:58,441 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:55:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:55:58,448 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 48 equivalence classes. [2025-03-13 21:55:58,478 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 106 of 106 statements. [2025-03-13 21:55:58,478 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-03-13 21:55:58,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:56:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:56:01,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:56:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612439999] [2025-03-13 21:56:01,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612439999] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:56:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914422179] [2025-03-13 21:56:01,844 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:56:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:56:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:56:01,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:56:01,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-13 21:56:01,882 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 48 equivalence classes. [2025-03-13 21:56:01,921 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 106 of 106 statements. [2025-03-13 21:56:01,921 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-03-13 21:56:01,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:56:01,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-03-13 21:56:01,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:56:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:56:04,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:56:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:56:07,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914422179] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:56:07,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:56:07,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 202 [2025-03-13 21:56:07,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088952912] [2025-03-13 21:56:07,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:56:07,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2025-03-13 21:56:07,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:56:07,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2025-03-13 21:56:07,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14950, Invalid=26056, Unknown=0, NotChecked=0, Total=41006 [2025-03-13 21:56:07,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-03-13 21:56:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 247 transitions, 1740 flow. Second operand has 203 states, 203 states have (on average 9.05911330049261) internal successors, (1839), 203 states have internal predecessors, (1839), 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) [2025-03-13 21:56:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:56:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-03-13 21:56:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand