./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:12:58,395 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:12:58,450 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:12:58,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:12:58,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:12:58,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:12:58,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:12:58,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:12:58,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:12:58,468 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:12:58,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:12:58,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:12:58,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:12:58,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:12:58,468 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:12:58,468 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:12:58,469 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:12:58,470 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:58,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:12:58,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:12:58,471 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:12:58,471 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 -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2025-03-08 17:12:58,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:12:58,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:12:58,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:12:58,721 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:12:58,721 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:12:58,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-08 17:12:59,846 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af3c03cb/d132b0fe75fe4a6bb5f1944362906e05/FLAG3e38ed4ce [2025-03-08 17:13:00,139 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:13:00,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-08 17:13:00,161 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af3c03cb/d132b0fe75fe4a6bb5f1944362906e05/FLAG3e38ed4ce [2025-03-08 17:13:00,175 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af3c03cb/d132b0fe75fe4a6bb5f1944362906e05 [2025-03-08 17:13:00,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:13:00,178 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:13:00,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:13:00,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:13:00,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:13:00,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51de40af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00, skipping insertion in model container [2025-03-08 17:13:00,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:13:00,395 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2025-03-08 17:13:00,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:13:00,403 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:13:00,442 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2025-03-08 17:13:00,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:13:00,467 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:13:00,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00 WrapperNode [2025-03-08 17:13:00,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:13:00,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:13:00,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:13:00,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:13:00,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,488 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-08 17:13:00,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:13:00,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:13:00,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:13:00,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:13:00,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,494 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,506 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]. [2025-03-08 17:13:00,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,509 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:13:00,513 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:13:00,513 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:13:00,513 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:13:00,513 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (1/1) ... [2025-03-08 17:13:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:13:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:00,534 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) [2025-03-08 17:13:00,537 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 [2025-03-08 17:13:00,551 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:13:00,551 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:13:00,551 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:13:00,552 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:13:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:13:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:13:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:13:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:13:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:13:00,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:13:00,552 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:13:00,630 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:13:00,631 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:13:00,732 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:13:00,732 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:13:00,778 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:13:00,778 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:13:00,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:13:00 BoogieIcfgContainer [2025-03-08 17:13:00,779 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:13:00,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:13:00,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:13:00,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:13:00,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:13:00" (1/3) ... [2025-03-08 17:13:00,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b8a341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:13:00, skipping insertion in model container [2025-03-08 17:13:00,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:13:00" (2/3) ... [2025-03-08 17:13:00,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b8a341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:13:00, skipping insertion in model container [2025-03-08 17:13:00,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:13:00" (3/3) ... [2025-03-08 17:13:00,785 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2025-03-08 17:13:00,795 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:13:00,796 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG triangular-longest-1.i that has 3 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 17:13:00,796 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:13:00,831 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:13:00,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2025-03-08 17:13:00,879 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-08 17:13:00,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:13:00,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-03-08 17:13:00,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2025-03-08 17:13:00,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2025-03-08 17:13:00,898 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:13:00,909 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;@514f3865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:13:00,909 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:13:00,917 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:13:00,917 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-08 17:13:00,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:13:00,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:00,920 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:00,920 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:00,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash 341173780, now seen corresponding path program 1 times [2025-03-08 17:13:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230105599] [2025-03-08 17:13:00,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:00,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:00,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 17:13:01,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 17:13:01,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:01,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:01,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230105599] [2025-03-08 17:13:01,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230105599] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:01,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:01,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:13:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394170428] [2025-03-08 17:13:01,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:01,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:13:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:01,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:13:01,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:13:01,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:01,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:01,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:01,530 INFO L124 PetriNetUnfolderBase]: 321/540 cut-off events. [2025-03-08 17:13:01,530 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:13:01,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 540 events. 321/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2134 event pairs, 62 based on Foata normal form. 12/535 useless extension candidates. Maximal degree in co-relation 1042. Up to 221 conditions per place. [2025-03-08 17:13:01,534 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2025-03-08 17:13:01,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2025-03-08 17:13:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:13:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:13:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2025-03-08 17:13:01,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-08 17:13:01,543 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2025-03-08 17:13:01,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2025-03-08 17:13:01,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:13:01,547 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2025-03-08 17:13:01,548 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2025-03-08 17:13:01,550 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-03-08 17:13:01,550 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2025-03-08 17:13:01,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:01,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:01,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:01,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:13:01,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:01,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -26154638, now seen corresponding path program 1 times [2025-03-08 17:13:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:01,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314764375] [2025-03-08 17:13:01,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:01,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:01,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:13:01,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:13:01,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:01,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314764375] [2025-03-08 17:13:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314764375] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:01,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:01,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:13:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378076218] [2025-03-08 17:13:01,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:01,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:13:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:01,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:13:01,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:13:01,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:01,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:01,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:01,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:01,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:01,915 INFO L124 PetriNetUnfolderBase]: 382/687 cut-off events. [2025-03-08 17:13:01,915 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2025-03-08 17:13:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 687 events. 382/687 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2911 event pairs, 65 based on Foata normal form. 27/710 useless extension candidates. Maximal degree in co-relation 1570. Up to 246 conditions per place. [2025-03-08 17:13:01,921 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2025-03-08 17:13:01,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2025-03-08 17:13:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:13:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:13:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2025-03-08 17:13:01,925 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-08 17:13:01,926 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2025-03-08 17:13:01,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2025-03-08 17:13:01,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-08 17:13:01,931 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2025-03-08 17:13:01,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2025-03-08 17:13:01,932 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2025-03-08 17:13:01,932 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2025-03-08 17:13:01,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:01,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:01,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:01,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:13:01,933 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:01,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1984146738, now seen corresponding path program 2 times [2025-03-08 17:13:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853316967] [2025-03-08 17:13:01,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:01,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:13:01,949 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:13:01,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:13:01,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:02,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853316967] [2025-03-08 17:13:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853316967] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:02,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:02,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:13:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119951443] [2025-03-08 17:13:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:13:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:13:02,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:13:02,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:02,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:02,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:02,230 INFO L124 PetriNetUnfolderBase]: 328/603 cut-off events. [2025-03-08 17:13:02,230 INFO L125 PetriNetUnfolderBase]: For 971/971 co-relation queries the response was YES. [2025-03-08 17:13:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 603 events. 328/603 cut-off events. For 971/971 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2513 event pairs, 65 based on Foata normal form. 45/644 useless extension candidates. Maximal degree in co-relation 1711. Up to 234 conditions per place. [2025-03-08 17:13:02,234 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2025-03-08 17:13:02,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2025-03-08 17:13:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:13:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:13:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-08 17:13:02,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2025-03-08 17:13:02,237 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2025-03-08 17:13:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2025-03-08 17:13:02,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-08 17:13:02,243 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2025-03-08 17:13:02,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-03-08 17:13:02,244 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2025-03-08 17:13:02,244 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2025-03-08 17:13:02,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:02,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:02,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:13:02,245 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:02,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1835947173, now seen corresponding path program 1 times [2025-03-08 17:13:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:02,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245675409] [2025-03-08 17:13:02,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:02,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:13:02,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:13:02,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:02,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245675409] [2025-03-08 17:13:02,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245675409] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:02,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:02,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:13:02,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279368194] [2025-03-08 17:13:02,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:13:02,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:13:02,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:13:02,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:02,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:02,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:02,585 INFO L124 PetriNetUnfolderBase]: 337/612 cut-off events. [2025-03-08 17:13:02,585 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2025-03-08 17:13:02,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 612 events. 337/612 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2551 event pairs, 74 based on Foata normal form. 18/626 useless extension candidates. Maximal degree in co-relation 1911. Up to 237 conditions per place. [2025-03-08 17:13:02,588 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2025-03-08 17:13:02,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2025-03-08 17:13:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:13:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:13:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2025-03-08 17:13:02,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2025-03-08 17:13:02,590 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2025-03-08 17:13:02,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2025-03-08 17:13:02,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-03-08 17:13:02,597 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2025-03-08 17:13:02,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2025-03-08 17:13:02,598 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2025-03-08 17:13:02,598 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2025-03-08 17:13:02,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:02,598 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:02,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:13:02,599 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:02,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 765975209, now seen corresponding path program 2 times [2025-03-08 17:13:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:02,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461878237] [2025-03-08 17:13:02,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:02,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:02,606 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:13:02,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:13:02,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:13:02,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461878237] [2025-03-08 17:13:02,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461878237] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:02,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:02,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:13:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034552193] [2025-03-08 17:13:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:13:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:13:02,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:13:02,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:02,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:02,915 INFO L124 PetriNetUnfolderBase]: 445/801 cut-off events. [2025-03-08 17:13:02,916 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2025-03-08 17:13:02,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 801 events. 445/801 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3459 event pairs, 59 based on Foata normal form. 27/823 useless extension candidates. Maximal degree in co-relation 2600. Up to 151 conditions per place. [2025-03-08 17:13:02,919 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 44 selfloop transitions, 23 changer transitions 30/100 dead transitions. [2025-03-08 17:13:02,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 100 transitions, 739 flow [2025-03-08 17:13:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:13:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:13:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2025-03-08 17:13:02,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-08 17:13:02,921 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 138 transitions. [2025-03-08 17:13:02,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 100 transitions, 739 flow [2025-03-08 17:13:02,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 685 flow, removed 21 selfloop flow, removed 4 redundant places. [2025-03-08 17:13:02,929 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 390 flow [2025-03-08 17:13:02,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2025-03-08 17:13:02,929 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2025-03-08 17:13:02,930 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 390 flow [2025-03-08 17:13:02,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:02,930 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:02,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:13:02,930 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:02,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1363386589, now seen corresponding path program 1 times [2025-03-08 17:13:02,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:02,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978123933] [2025-03-08 17:13:02,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:02,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:13:02,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:13:02,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:02,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978123933] [2025-03-08 17:13:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978123933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086630345] [2025-03-08 17:13:03,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:03,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:03,023 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) [2025-03-08 17:13:03,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:13:03,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:13:03,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:13:03,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:03,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:03,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:13:03,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:03,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086630345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:03,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:03,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-08 17:13:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759249921] [2025-03-08 17:13:03,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:03,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:13:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:03,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:13:03,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:13:03,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:03,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 390 flow. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2025-03-08 17:13:03,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:03,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:03,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:03,647 INFO L124 PetriNetUnfolderBase]: 571/1050 cut-off events. [2025-03-08 17:13:03,648 INFO L125 PetriNetUnfolderBase]: For 6872/6872 co-relation queries the response was YES. [2025-03-08 17:13:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4139 conditions, 1050 events. 571/1050 cut-off events. For 6872/6872 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4364 event pairs, 137 based on Foata normal form. 63/1109 useless extension candidates. Maximal degree in co-relation 4107. Up to 486 conditions per place. [2025-03-08 17:13:03,652 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 64 selfloop transitions, 17 changer transitions 67/151 dead transitions. [2025-03-08 17:13:03,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 151 transitions, 1346 flow [2025-03-08 17:13:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:13:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:13:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2025-03-08 17:13:03,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2025-03-08 17:13:03,654 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 390 flow. Second operand 19 states and 231 transitions. [2025-03-08 17:13:03,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 151 transitions, 1346 flow [2025-03-08 17:13:03,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 151 transitions, 1267 flow, removed 32 selfloop flow, removed 5 redundant places. [2025-03-08 17:13:03,667 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 521 flow [2025-03-08 17:13:03,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=521, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2025-03-08 17:13:03,668 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 62 predicate places. [2025-03-08 17:13:03,668 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 521 flow [2025-03-08 17:13:03,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2025-03-08 17:13:03,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:03,669 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:03,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:13:03,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 17:13:03,873 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:03,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1919587151, now seen corresponding path program 2 times [2025-03-08 17:13:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025933129] [2025-03-08 17:13:03,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:03,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:03,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:13:03,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:13:03,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:13:03,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:03,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:03,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025933129] [2025-03-08 17:13:03,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025933129] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:13:03,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:13:03,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:13:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678917064] [2025-03-08 17:13:03,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:13:03,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:13:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:03,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:13:03,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:13:03,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:03,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:03,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:03,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:03,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:04,261 INFO L124 PetriNetUnfolderBase]: 652/1217 cut-off events. [2025-03-08 17:13:04,261 INFO L125 PetriNetUnfolderBase]: For 19130/19130 co-relation queries the response was YES. [2025-03-08 17:13:04,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6062 conditions, 1217 events. 652/1217 cut-off events. For 19130/19130 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5640 event pairs, 132 based on Foata normal form. 27/1240 useless extension candidates. Maximal degree in co-relation 6019. Up to 483 conditions per place. [2025-03-08 17:13:04,270 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 76 selfloop transitions, 23 changer transitions 31/133 dead transitions. [2025-03-08 17:13:04,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1509 flow [2025-03-08 17:13:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:13:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:13:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 187 transitions. [2025-03-08 17:13:04,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2025-03-08 17:13:04,271 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 521 flow. Second operand 15 states and 187 transitions. [2025-03-08 17:13:04,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1509 flow [2025-03-08 17:13:04,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1211 flow, removed 138 selfloop flow, removed 12 redundant places. [2025-03-08 17:13:04,291 INFO L231 Difference]: Finished difference. Result has 90 places, 57 transitions, 583 flow [2025-03-08 17:13:04,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=583, PETRI_PLACES=90, PETRI_TRANSITIONS=57} [2025-03-08 17:13:04,292 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2025-03-08 17:13:04,292 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 57 transitions, 583 flow [2025-03-08 17:13:04,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:04,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:04,292 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:04,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:13:04,292 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:04,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:04,295 INFO L85 PathProgramCache]: Analyzing trace with hash -744688911, now seen corresponding path program 3 times [2025-03-08 17:13:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:04,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236763698] [2025-03-08 17:13:04,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:04,300 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:13:04,304 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:13:04,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:13:04,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236763698] [2025-03-08 17:13:04,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236763698] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529368867] [2025-03-08 17:13:04,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:04,393 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) [2025-03-08 17:13:04,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:13:04,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:13:04,436 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:13:04,436 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:13:04,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:04,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:13:04,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:04,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529368867] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:04,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-08 17:13:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857768303] [2025-03-08 17:13:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:04,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:13:04,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:04,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:13:04,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:13:04,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:04,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 57 transitions, 583 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2025-03-08 17:13:04,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:04,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:04,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:05,085 INFO L124 PetriNetUnfolderBase]: 841/1529 cut-off events. [2025-03-08 17:13:05,086 INFO L125 PetriNetUnfolderBase]: For 24317/24317 co-relation queries the response was YES. [2025-03-08 17:13:05,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 1529 events. 841/1529 cut-off events. For 24317/24317 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7243 event pairs, 46 based on Foata normal form. 81/1606 useless extension candidates. Maximal degree in co-relation 7713. Up to 246 conditions per place. [2025-03-08 17:13:05,094 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 49 changer transitions 83/214 dead transitions. [2025-03-08 17:13:05,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 214 transitions, 2477 flow [2025-03-08 17:13:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:13:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:13:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 321 transitions. [2025-03-08 17:13:05,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2025-03-08 17:13:05,097 INFO L175 Difference]: Start difference. First operand has 90 places, 57 transitions, 583 flow. Second operand 26 states and 321 transitions. [2025-03-08 17:13:05,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 214 transitions, 2477 flow [2025-03-08 17:13:05,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 214 transitions, 2253 flow, removed 96 selfloop flow, removed 10 redundant places. [2025-03-08 17:13:05,124 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 953 flow [2025-03-08 17:13:05,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=953, PETRI_PLACES=119, PETRI_TRANSITIONS=70} [2025-03-08 17:13:05,125 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2025-03-08 17:13:05,125 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 953 flow [2025-03-08 17:13:05,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2025-03-08 17:13:05,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:05,125 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:05,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:13:05,326 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,SelfDestructingSolverStorable7 [2025-03-08 17:13:05,326 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:05,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1992501137, now seen corresponding path program 1 times [2025-03-08 17:13:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993106453] [2025-03-08 17:13:05,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:05,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 17:13:05,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:13:05,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:05,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993106453] [2025-03-08 17:13:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993106453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:05,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586150605] [2025-03-08 17:13:05,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:05,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:05,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:05,459 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) [2025-03-08 17:13:05,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:13:05,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 17:13:05,504 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:13:05,504 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:05,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:05,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:13:05,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:05,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586150605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:05,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:05,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-08 17:13:05,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376910615] [2025-03-08 17:13:05,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:05,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:13:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:05,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:13:05,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:13:05,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:05,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 70 transitions, 953 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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) [2025-03-08 17:13:05,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:05,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:05,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:06,337 INFO L124 PetriNetUnfolderBase]: 1327/2416 cut-off events. [2025-03-08 17:13:06,337 INFO L125 PetriNetUnfolderBase]: For 77863/77863 co-relation queries the response was YES. [2025-03-08 17:13:06,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14985 conditions, 2416 events. 1327/2416 cut-off events. For 77863/77863 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11833 event pairs, 83 based on Foata normal form. 63/2474 useless extension candidates. Maximal degree in co-relation 14928. Up to 444 conditions per place. [2025-03-08 17:13:06,354 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 97 selfloop transitions, 80 changer transitions 86/266 dead transitions. [2025-03-08 17:13:06,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 266 transitions, 4124 flow [2025-03-08 17:13:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 17:13:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-08 17:13:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 358 transitions. [2025-03-08 17:13:06,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.514367816091954 [2025-03-08 17:13:06,355 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 953 flow. Second operand 29 states and 358 transitions. [2025-03-08 17:13:06,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 266 transitions, 4124 flow [2025-03-08 17:13:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 266 transitions, 3416 flow, removed 330 selfloop flow, removed 18 redundant places. [2025-03-08 17:13:06,428 INFO L231 Difference]: Finished difference. Result has 141 places, 106 transitions, 1630 flow [2025-03-08 17:13:06,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1630, PETRI_PLACES=141, PETRI_TRANSITIONS=106} [2025-03-08 17:13:06,428 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 115 predicate places. [2025-03-08 17:13:06,428 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 106 transitions, 1630 flow [2025-03-08 17:13:06,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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) [2025-03-08 17:13:06,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:06,429 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:06,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:13:06,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:06,629 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:06,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1036724742, now seen corresponding path program 2 times [2025-03-08 17:13:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125641676] [2025-03-08 17:13:06,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:06,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:13:06,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:06,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:06,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125641676] [2025-03-08 17:13:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125641676] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403942302] [2025-03-08 17:13:06,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:06,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:06,829 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) [2025-03-08 17:13:06,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:13:06,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:13:06,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:06,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:06,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:06,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:13:06,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:06,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:07,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403942302] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:07,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:07,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-03-08 17:13:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807242221] [2025-03-08 17:13:07,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:07,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:13:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:07,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:13:07,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:13:07,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:07,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 106 transitions, 1630 flow. Second operand has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 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) [2025-03-08 17:13:07,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:07,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:07,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:08,195 INFO L124 PetriNetUnfolderBase]: 1561/2913 cut-off events. [2025-03-08 17:13:08,195 INFO L125 PetriNetUnfolderBase]: For 172037/172037 co-relation queries the response was YES. [2025-03-08 17:13:08,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21787 conditions, 2913 events. 1561/2913 cut-off events. For 172037/172037 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 13960 event pairs, 455 based on Foata normal form. 117/3026 useless extension candidates. Maximal degree in co-relation 21720. Up to 1656 conditions per place. [2025-03-08 17:13:08,215 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 35 changer transitions 133/323 dead transitions. [2025-03-08 17:13:08,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 323 transitions, 6273 flow [2025-03-08 17:13:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 17:13:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-08 17:13:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 441 transitions. [2025-03-08 17:13:08,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2025-03-08 17:13:08,223 INFO L175 Difference]: Start difference. First operand has 141 places, 106 transitions, 1630 flow. Second operand 37 states and 441 transitions. [2025-03-08 17:13:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 323 transitions, 6273 flow [2025-03-08 17:13:08,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 323 transitions, 4779 flow, removed 724 selfloop flow, removed 14 redundant places. [2025-03-08 17:13:08,342 INFO L231 Difference]: Finished difference. Result has 181 places, 120 transitions, 1824 flow [2025-03-08 17:13:08,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1824, PETRI_PLACES=181, PETRI_TRANSITIONS=120} [2025-03-08 17:13:08,343 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2025-03-08 17:13:08,343 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 120 transitions, 1824 flow [2025-03-08 17:13:08,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 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) [2025-03-08 17:13:08,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:08,343 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:08,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:13:08,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:08,544 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:08,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -248359850, now seen corresponding path program 3 times [2025-03-08 17:13:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790437229] [2025-03-08 17:13:08,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:08,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-08 17:13:08,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:08,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 17:13:08,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:08,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:08,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790437229] [2025-03-08 17:13:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790437229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:08,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935800650] [2025-03-08 17:13:08,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:08,717 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) [2025-03-08 17:13:08,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:13:08,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-08 17:13:08,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:08,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 17:13:08,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:08,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:13:08,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:08,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:09,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935800650] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:09,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-03-08 17:13:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374726084] [2025-03-08 17:13:09,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:09,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:13:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:09,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:13:09,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:13:09,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:09,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 120 transitions, 1824 flow. Second operand has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 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) [2025-03-08 17:13:09,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:09,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:09,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:10,206 INFO L124 PetriNetUnfolderBase]: 1957/3799 cut-off events. [2025-03-08 17:13:10,207 INFO L125 PetriNetUnfolderBase]: For 291079/291079 co-relation queries the response was YES. [2025-03-08 17:13:10,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30189 conditions, 3799 events. 1957/3799 cut-off events. For 291079/291079 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 20806 event pairs, 266 based on Foata normal form. 117/3912 useless extension candidates. Maximal degree in co-relation 30104. Up to 1084 conditions per place. [2025-03-08 17:13:10,240 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 106 changer transitions 147/408 dead transitions. [2025-03-08 17:13:10,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 408 transitions, 8148 flow [2025-03-08 17:13:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-08 17:13:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-08 17:13:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 527 transitions. [2025-03-08 17:13:10,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4990530303030303 [2025-03-08 17:13:10,242 INFO L175 Difference]: Start difference. First operand has 181 places, 120 transitions, 1824 flow. Second operand 44 states and 527 transitions. [2025-03-08 17:13:10,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 408 transitions, 8148 flow [2025-03-08 17:13:10,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 408 transitions, 6881 flow, removed 613 selfloop flow, removed 24 redundant places. [2025-03-08 17:13:10,569 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 2837 flow [2025-03-08 17:13:10,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2837, PETRI_PLACES=213, PETRI_TRANSITIONS=165} [2025-03-08 17:13:10,570 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 187 predicate places. [2025-03-08 17:13:10,570 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 2837 flow [2025-03-08 17:13:10,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 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) [2025-03-08 17:13:10,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:10,570 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:10,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:13:10,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 17:13:10,771 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:10,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1040177930, now seen corresponding path program 4 times [2025-03-08 17:13:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:10,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710812547] [2025-03-08 17:13:10,771 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:13:10,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:10,775 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:13:10,779 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:10,779 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:13:10,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:10,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710812547] [2025-03-08 17:13:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710812547] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301400206] [2025-03-08 17:13:10,927 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:13:10,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:10,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:10,930 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) [2025-03-08 17:13:10,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:13:10,964 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 17:13:10,976 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:13:10,976 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:13:10,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:10,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:13:10,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:11,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301400206] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:11,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-08 17:13:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735286776] [2025-03-08 17:13:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:11,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:13:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:11,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:13:11,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:13:11,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:11,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 165 transitions, 2837 flow. Second operand has 26 states, 26 states have (on average 7.230769230769231) internal successors, (188), 26 states have internal predecessors, (188), 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) [2025-03-08 17:13:11,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:12,950 INFO L124 PetriNetUnfolderBase]: 3433/6569 cut-off events. [2025-03-08 17:13:12,950 INFO L125 PetriNetUnfolderBase]: For 700008/700008 co-relation queries the response was YES. [2025-03-08 17:13:12,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57356 conditions, 6569 events. 3433/6569 cut-off events. For 700008/700008 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 41182 event pairs, 144 based on Foata normal form. 126/6691 useless extension candidates. Maximal degree in co-relation 57258. Up to 1500 conditions per place. [2025-03-08 17:13:13,007 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 161 selfloop transitions, 235 changer transitions 162/561 dead transitions. [2025-03-08 17:13:13,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 561 transitions, 12693 flow [2025-03-08 17:13:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-08 17:13:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-03-08 17:13:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 607 transitions. [2025-03-08 17:13:13,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5058333333333334 [2025-03-08 17:13:13,014 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 2837 flow. Second operand 50 states and 607 transitions. [2025-03-08 17:13:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 561 transitions, 12693 flow [2025-03-08 17:13:14,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 561 transitions, 10864 flow, removed 886 selfloop flow, removed 26 redundant places. [2025-03-08 17:13:14,474 INFO L231 Difference]: Finished difference. Result has 256 places, 278 transitions, 5391 flow [2025-03-08 17:13:14,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=5391, PETRI_PLACES=256, PETRI_TRANSITIONS=278} [2025-03-08 17:13:14,475 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 230 predicate places. [2025-03-08 17:13:14,475 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 278 transitions, 5391 flow [2025-03-08 17:13:14,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.230769230769231) internal successors, (188), 26 states have internal predecessors, (188), 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) [2025-03-08 17:13:14,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:14,476 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:14,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:13:14,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:14,676 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1546388459, now seen corresponding path program 5 times [2025-03-08 17:13:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396517116] [2025-03-08 17:13:14,677 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:13:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:14,682 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 6 equivalence classes. [2025-03-08 17:13:14,687 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:13:14,687 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 17:13:14,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:14,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:14,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396517116] [2025-03-08 17:13:14,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396517116] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958858088] [2025-03-08 17:13:14,830 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:13:14,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:14,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:14,832 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) [2025-03-08 17:13:14,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:13:14,864 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 6 equivalence classes. [2025-03-08 17:13:14,875 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:13:14,876 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 17:13:14,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:14,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 17:13:14,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:14,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:15,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958858088] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:15,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:15,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2025-03-08 17:13:15,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984758812] [2025-03-08 17:13:15,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:15,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:13:15,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:15,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:13:15,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:13:15,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:15,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 278 transitions, 5391 flow. Second operand has 27 states, 27 states have (on average 7.185185185185185) internal successors, (194), 27 states have internal predecessors, (194), 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) [2025-03-08 17:13:15,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:15,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:15,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:17,619 INFO L124 PetriNetUnfolderBase]: 4819/9213 cut-off events. [2025-03-08 17:13:17,620 INFO L125 PetriNetUnfolderBase]: For 1635604/1635604 co-relation queries the response was YES. [2025-03-08 17:13:17,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99057 conditions, 9213 events. 4819/9213 cut-off events. For 1635604/1635604 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 59405 event pairs, 47 based on Foata normal form. 135/9343 useless extension candidates. Maximal degree in co-relation 98939. Up to 2127 conditions per place. [2025-03-08 17:13:17,714 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 198 selfloop transitions, 357 changer transitions 183/741 dead transitions. [2025-03-08 17:13:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 741 transitions, 21890 flow [2025-03-08 17:13:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-08 17:13:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-03-08 17:13:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 750 transitions. [2025-03-08 17:13:17,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5122950819672131 [2025-03-08 17:13:17,719 INFO L175 Difference]: Start difference. First operand has 256 places, 278 transitions, 5391 flow. Second operand 61 states and 750 transitions. [2025-03-08 17:13:17,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 741 transitions, 21890 flow [2025-03-08 17:13:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 741 transitions, 15904 flow, removed 2955 selfloop flow, removed 25 redundant places. [2025-03-08 17:13:21,200 INFO L231 Difference]: Finished difference. Result has 318 places, 387 transitions, 8332 flow [2025-03-08 17:13:21,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=8332, PETRI_PLACES=318, PETRI_TRANSITIONS=387} [2025-03-08 17:13:21,200 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 292 predicate places. [2025-03-08 17:13:21,201 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 387 transitions, 8332 flow [2025-03-08 17:13:21,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.185185185185185) internal successors, (194), 27 states have internal predecessors, (194), 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) [2025-03-08 17:13:21,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:21,201 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:21,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:13:21,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:21,402 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:21,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:21,402 INFO L85 PathProgramCache]: Analyzing trace with hash -695864503, now seen corresponding path program 6 times [2025-03-08 17:13:21,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:21,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136658672] [2025-03-08 17:13:21,403 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:13:21,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:21,409 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 11 equivalence classes. [2025-03-08 17:13:21,429 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 17:13:21,430 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 17:13:21,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136658672] [2025-03-08 17:13:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136658672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856931791] [2025-03-08 17:13:21,713 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:13:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:21,715 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) [2025-03-08 17:13:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:13:21,748 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 11 equivalence classes. [2025-03-08 17:13:21,769 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 17:13:21,769 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 17:13:21,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:21,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 17:13:21,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:21,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:22,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856931791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:22,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:22,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2025-03-08 17:13:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557922683] [2025-03-08 17:13:22,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:22,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-08 17:13:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:22,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-08 17:13:22,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 17:13:22,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:22,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 387 transitions, 8332 flow. Second operand has 45 states, 45 states have (on average 7.044444444444444) internal successors, (317), 45 states have internal predecessors, (317), 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) [2025-03-08 17:13:22,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:22,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:22,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:27,459 INFO L124 PetriNetUnfolderBase]: 6574/12421 cut-off events. [2025-03-08 17:13:27,459 INFO L125 PetriNetUnfolderBase]: For 3237313/3237313 co-relation queries the response was YES. [2025-03-08 17:13:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155451 conditions, 12421 events. 6574/12421 cut-off events. For 3237313/3237313 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 76652 event pairs, 58 based on Foata normal form. 279/12696 useless extension candidates. Maximal degree in co-relation 155304. Up to 2835 conditions per place. [2025-03-08 17:13:27,609 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 316 selfloop transitions, 470 changer transitions 329/1118 dead transitions. [2025-03-08 17:13:27,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1118 transitions, 37469 flow [2025-03-08 17:13:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2025-03-08 17:13:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2025-03-08 17:13:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 1284 transitions. [2025-03-08 17:13:27,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2025-03-08 17:13:27,612 INFO L175 Difference]: Start difference. First operand has 318 places, 387 transitions, 8332 flow. Second operand 105 states and 1284 transitions. [2025-03-08 17:13:27,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1118 transitions, 37469 flow [2025-03-08 17:13:32,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1118 transitions, 29014 flow, removed 4177 selfloop flow, removed 27 redundant places. [2025-03-08 17:13:32,723 INFO L231 Difference]: Finished difference. Result has 444 places, 502 transitions, 12264 flow [2025-03-08 17:13:32,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=12264, PETRI_PLACES=444, PETRI_TRANSITIONS=502} [2025-03-08 17:13:32,724 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 418 predicate places. [2025-03-08 17:13:32,724 INFO L471 AbstractCegarLoop]: Abstraction has has 444 places, 502 transitions, 12264 flow [2025-03-08 17:13:32,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.044444444444444) internal successors, (317), 45 states have internal predecessors, (317), 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) [2025-03-08 17:13:32,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:32,725 INFO L206 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:32,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:13:32,929 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,SelfDestructingSolverStorable13 [2025-03-08 17:13:32,929 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:13:32,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 305205859, now seen corresponding path program 7 times [2025-03-08 17:13:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89671903] [2025-03-08 17:13:32,930 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:13:32,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:32,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-08 17:13:32,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-08 17:13:32,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:32,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:33,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:33,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89671903] [2025-03-08 17:13:33,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89671903] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:33,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315959465] [2025-03-08 17:13:33,558 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:13:33,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:33,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:33,560 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) [2025-03-08 17:13:33,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:13:33,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-08 17:13:33,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-08 17:13:33,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:33,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:33,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 17:13:33,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:33,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:13:34,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315959465] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:34,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:34,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2025-03-08 17:13:34,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429016424] [2025-03-08 17:13:34,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:34,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2025-03-08 17:13:34,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:34,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2025-03-08 17:13:34,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1354, Invalid=4498, Unknown=0, NotChecked=0, Total=5852 [2025-03-08 17:13:34,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:13:34,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 502 transitions, 12264 flow. Second operand has 77 states, 77 states have (on average 7.077922077922078) internal successors, (545), 77 states have internal predecessors, (545), 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) [2025-03-08 17:13:34,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:34,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:13:34,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:41,468 INFO L124 PetriNetUnfolderBase]: 8635/16057 cut-off events. [2025-03-08 17:13:41,468 INFO L125 PetriNetUnfolderBase]: For 6562932/6562932 co-relation queries the response was YES. [2025-03-08 17:13:41,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230190 conditions, 16057 events. 8635/16057 cut-off events. For 6562932/6562932 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 97395 event pairs, 65 based on Foata normal form. 54/16106 useless extension candidates. Maximal degree in co-relation 229995. Up to 3621 conditions per place. [2025-03-08 17:13:41,708 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 320 selfloop transitions, 631 changer transitions 195/1149 dead transitions. [2025-03-08 17:13:41,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1149 transitions, 43320 flow [2025-03-08 17:13:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-03-08 17:13:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2025-03-08 17:13:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1041 transitions. [2025-03-08 17:13:41,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5043604651162791 [2025-03-08 17:13:41,710 INFO L175 Difference]: Start difference. First operand has 444 places, 502 transitions, 12264 flow. Second operand 86 states and 1041 transitions. [2025-03-08 17:13:41,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1149 transitions, 43320 flow [2025-03-08 17:14:01,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1149 transitions, 28246 flow, removed 7436 selfloop flow, removed 40 redundant places. [2025-03-08 17:14:02,005 INFO L231 Difference]: Finished difference. Result has 486 places, 669 transitions, 13503 flow [2025-03-08 17:14:02,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=8226, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=13503, PETRI_PLACES=486, PETRI_TRANSITIONS=669} [2025-03-08 17:14:02,006 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 460 predicate places. [2025-03-08 17:14:02,007 INFO L471 AbstractCegarLoop]: Abstraction has has 486 places, 669 transitions, 13503 flow [2025-03-08 17:14:02,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 7.077922077922078) internal successors, (545), 77 states have internal predecessors, (545), 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) [2025-03-08 17:14:02,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:02,007 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:14:02,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:14:02,207 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,SelfDestructingSolverStorable14 [2025-03-08 17:14:02,208 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:14:02,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1000036294, now seen corresponding path program 8 times [2025-03-08 17:14:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:02,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589893298] [2025-03-08 17:14:02,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:14:02,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:02,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-08 17:14:02,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-08 17:14:02,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:14:02,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:14:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:14:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589893298] [2025-03-08 17:14:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589893298] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:14:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634146825] [2025-03-08 17:14:02,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:14:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:14:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:14:02,904 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) [2025-03-08 17:14:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:14:02,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-08 17:14:02,959 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-08 17:14:02,959 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:14:02,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:14:02,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 17:14:02,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:14:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 1 proven. 887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:03,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:14:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634146825] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:14:03,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:14:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 45 [2025-03-08 17:14:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976033943] [2025-03-08 17:14:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:14:03,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-08 17:14:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:14:03,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-08 17:14:03,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 17:14:03,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:14:03,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 669 transitions, 13503 flow. Second operand has 46 states, 46 states have (on average 6.978260869565218) internal successors, (321), 46 states have internal predecessors, (321), 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) [2025-03-08 17:14:03,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:14:03,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:14:03,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:14:10,354 INFO L124 PetriNetUnfolderBase]: 8635/16099 cut-off events. [2025-03-08 17:14:10,355 INFO L125 PetriNetUnfolderBase]: For 5526393/5526393 co-relation queries the response was YES. [2025-03-08 17:14:10,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199007 conditions, 16099 events. 8635/16099 cut-off events. For 5526393/5526393 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 97636 event pairs, 38 based on Foata normal form. 27/16122 useless extension candidates. Maximal degree in co-relation 198815. Up to 3639 conditions per place. [2025-03-08 17:14:10,596 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 332 selfloop transitions, 640 changer transitions 183/1158 dead transitions. [2025-03-08 17:14:10,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1158 transitions, 30892 flow [2025-03-08 17:14:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2025-03-08 17:14:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2025-03-08 17:14:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1059 transitions. [2025-03-08 17:14:10,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5014204545454546 [2025-03-08 17:14:10,598 INFO L175 Difference]: Start difference. First operand has 486 places, 669 transitions, 13503 flow. Second operand 88 states and 1059 transitions. [2025-03-08 17:14:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1158 transitions, 30892 flow [2025-03-08 17:14:25,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1158 transitions, 27788 flow, removed 1176 selfloop flow, removed 46 redundant places. [2025-03-08 17:14:25,120 INFO L231 Difference]: Finished difference. Result has 527 places, 676 transitions, 12976 flow [2025-03-08 17:14:25,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=12976, PETRI_PLACES=527, PETRI_TRANSITIONS=676} [2025-03-08 17:14:25,121 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 501 predicate places. [2025-03-08 17:14:25,121 INFO L471 AbstractCegarLoop]: Abstraction has has 527 places, 676 transitions, 12976 flow [2025-03-08 17:14:25,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.978260869565218) internal successors, (321), 46 states have internal predecessors, (321), 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) [2025-03-08 17:14:25,121 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:14:25,121 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:14:25,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 17:14:25,321 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,SelfDestructingSolverStorable15 [2025-03-08 17:14:25,322 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:14:25,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:14:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1036439336, now seen corresponding path program 9 times [2025-03-08 17:14:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:14:25,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717560470] [2025-03-08 17:14:25,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:14:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:14:25,330 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 19 equivalence classes. [2025-03-08 17:14:25,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 129 of 129 statements. [2025-03-08 17:14:25,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-08 17:14:25,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:14:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:14:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717560470] [2025-03-08 17:14:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717560470] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:14:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777667919] [2025-03-08 17:14:26,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:14:26,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:14:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:14:26,105 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) [2025-03-08 17:14:26,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:14:26,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 19 equivalence classes. [2025-03-08 17:14:26,170 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 129 of 129 statements. [2025-03-08 17:14:26,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-08 17:14:26,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:14:26,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 17:14:26,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:14:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:26,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:14:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:14:26,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777667919] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:14:26,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:14:26,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 44 [2025-03-08 17:14:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713556201] [2025-03-08 17:14:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:14:26,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-08 17:14:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:14:26,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-08 17:14:26,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 17:14:26,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:14:26,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 676 transitions, 12976 flow. Second operand has 45 states, 45 states have (on average 6.955555555555556) internal successors, (313), 45 states have internal predecessors, (313), 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) [2025-03-08 17:14:26,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:14:26,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:14:26,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:14:32,804 INFO L124 PetriNetUnfolderBase]: 8806/16421 cut-off events. [2025-03-08 17:14:32,805 INFO L125 PetriNetUnfolderBase]: For 5490633/5490633 co-relation queries the response was YES. [2025-03-08 17:14:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201935 conditions, 16421 events. 8806/16421 cut-off events. For 5490633/5490633 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 99407 event pairs, 65 based on Foata normal form. 27/16443 useless extension candidates. Maximal degree in co-relation 201743. Up to 3717 conditions per place. [2025-03-08 17:14:33,085 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 341 selfloop transitions, 648 changer transitions 175/1167 dead transitions. [2025-03-08 17:14:33,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1167 transitions, 30713 flow [2025-03-08 17:14:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2025-03-08 17:14:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2025-03-08 17:14:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 1052 transitions. [2025-03-08 17:14:33,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5038314176245211 [2025-03-08 17:14:33,087 INFO L175 Difference]: Start difference. First operand has 527 places, 676 transitions, 12976 flow. Second operand 87 states and 1052 transitions. [2025-03-08 17:14:33,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1167 transitions, 30713 flow