./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 f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/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-?-f8ab0bd-m [2025-03-13 21:26:18,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:26:18,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:26:18,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:26:18,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:26:18,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:26:18,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:26:18,692 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:26:18,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:26:18,693 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:26:18,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:26:18,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:26:18,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:26:18,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:26:18,694 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:26:18,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:26:18,695 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:26:18,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:26:18,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:26:18,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:26:18,696 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 [2025-03-13 21:26:18,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:26:18,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:26:18,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:26:18,935 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:26:18,935 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:26:18,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-13 21:26:20,085 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947a11ca5/16f04631e8ff47a5b8c9247e5e044958/FLAGd9d2fe644 [2025-03-13 21:26:20,417 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:26:20,419 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-13 21:26:20,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947a11ca5/16f04631e8ff47a5b8c9247e5e044958/FLAGd9d2fe644 [2025-03-13 21:26:20,663 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947a11ca5/16f04631e8ff47a5b8c9247e5e044958 [2025-03-13 21:26:20,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:26:20,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:26:20,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:26:20,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:26:20,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:26:20,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:26:20" (1/1) ... [2025-03-13 21:26:20,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5deddda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:20, skipping insertion in model container [2025-03-13 21:26:20,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:26:20" (1/1) ... [2025-03-13 21:26:20,700 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:26:20,951 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] [2025-03-13 21:26:20,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:26:20,961 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:26:20,988 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] [2025-03-13 21:26:20,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:26:21,007 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:26:21,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21 WrapperNode [2025-03-13 21:26:21,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:26:21,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:26:21,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:26:21,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:26:21,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,029 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-13 21:26:21,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:26:21,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:26:21,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:26:21,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:26:21,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,044 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-13 21:26:21,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,047 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:26:21,051 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:26:21,051 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:26:21,051 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:26:21,052 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (1/1) ... [2025-03-13 21:26:21,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:26:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:21,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-13 21:26:21,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-13 21:26:21,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-13 21:26:21,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:26:21,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:26:21,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:26:21,095 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:26:21,177 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:26:21,179 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:26:21,270 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:26:21,271 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:26:21,271 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:26:21,328 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:26:21,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:26:21 BoogieIcfgContainer [2025-03-13 21:26:21,328 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:26:21,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:26:21,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:26:21,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:26:21,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:26:20" (1/3) ... [2025-03-13 21:26:21,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23013f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:26:21, skipping insertion in model container [2025-03-13 21:26:21,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:26:21" (2/3) ... [2025-03-13 21:26:21,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23013f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:26:21, skipping insertion in model container [2025-03-13 21:26:21,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:26:21" (3/3) ... [2025-03-13 21:26:21,336 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2025-03-13 21:26:21,346 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:26:21,347 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. [2025-03-13 21:26:21,347 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:26:21,379 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:26:21,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2025-03-13 21:26:21,418 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-13 21:26:21,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:26:21,426 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. [2025-03-13 21:26:21,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2025-03-13 21:26:21,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2025-03-13 21:26:21,436 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:26:21,447 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;@6cbc479a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:26:21,449 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:26:21,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:26:21,456 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-13 21:26:21,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:26:21,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:21,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:21,457 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:21,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 341173780, now seen corresponding path program 1 times [2025-03-13 21:26:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:21,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189541286] [2025-03-13 21:26:21,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:21,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:26:21,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:26:21,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:21,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189541286] [2025-03-13 21:26:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189541286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:21,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:26:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299257787] [2025-03-13 21:26:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:21,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:26:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:21,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:26:21,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:26:21,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:21,877 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) [2025-03-13 21:26:21,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:21,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:21,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:22,101 INFO L124 PetriNetUnfolderBase]: 321/540 cut-off events. [2025-03-13 21:26:22,102 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:26:22,104 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. [2025-03-13 21:26:22,109 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2025-03-13 21:26:22,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2025-03-13 21:26:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:26:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:26:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2025-03-13 21:26:22,124 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-13 21:26:22,126 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2025-03-13 21:26:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2025-03-13 21:26:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-13 21:26:22,133 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2025-03-13 21:26:22,135 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} [2025-03-13 21:26:22,139 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-03-13 21:26:22,139 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2025-03-13 21:26:22,140 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) [2025-03-13 21:26:22,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:22,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:22,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:26:22,140 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:22,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash -26154638, now seen corresponding path program 1 times [2025-03-13 21:26:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062076935] [2025-03-13 21:26:22,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:22,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:22,151 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:26:22,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:26:22,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:22,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062076935] [2025-03-13 21:26:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062076935] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:22,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:22,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:26:22,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915607540] [2025-03-13 21:26:22,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:22,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:26:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:22,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:26:22,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:26:22,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:22,300 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) [2025-03-13 21:26:22,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:22,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:22,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:22,486 INFO L124 PetriNetUnfolderBase]: 382/687 cut-off events. [2025-03-13 21:26:22,486 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2025-03-13 21:26:22,490 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. [2025-03-13 21:26:22,493 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2025-03-13 21:26:22,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2025-03-13 21:26:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:26:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:26:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2025-03-13 21:26:22,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-13 21:26:22,495 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2025-03-13 21:26:22,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2025-03-13 21:26:22,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-13 21:26:22,498 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2025-03-13 21:26:22,498 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} [2025-03-13 21:26:22,499 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2025-03-13 21:26:22,499 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2025-03-13 21:26:22,499 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) [2025-03-13 21:26:22,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:22,499 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:22,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:26:22,500 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:22,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1984146738, now seen corresponding path program 2 times [2025-03-13 21:26:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:22,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305954978] [2025-03-13 21:26:22,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:22,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:22,513 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:26:22,519 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:26:22,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:26:22,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305954978] [2025-03-13 21:26:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305954978] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:22,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:26:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119023267] [2025-03-13 21:26:22,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:22,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:26:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:22,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:26:22,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:26:22,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:22,620 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) [2025-03-13 21:26:22,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:22,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:22,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:22,792 INFO L124 PetriNetUnfolderBase]: 328/603 cut-off events. [2025-03-13 21:26:22,792 INFO L125 PetriNetUnfolderBase]: For 971/971 co-relation queries the response was YES. [2025-03-13 21:26:22,793 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. [2025-03-13 21:26:22,795 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2025-03-13 21:26:22,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2025-03-13 21:26:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:26:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:26:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-13 21:26:22,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2025-03-13 21:26:22,797 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2025-03-13 21:26:22,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2025-03-13 21:26:22,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-13 21:26:22,801 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2025-03-13 21:26:22,801 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} [2025-03-13 21:26:22,802 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2025-03-13 21:26:22,802 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2025-03-13 21:26:22,802 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) [2025-03-13 21:26:22,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:22,802 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:22,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:26:22,802 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:22,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1835947173, now seen corresponding path program 1 times [2025-03-13 21:26:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374555872] [2025-03-13 21:26:22,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:22,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:26:22,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:26:22,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:22,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:22,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:22,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374555872] [2025-03-13 21:26:22,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374555872] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:22,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:22,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:26:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021227586] [2025-03-13 21:26:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:22,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:26:22,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:22,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:26:22,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:26:22,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:22,931 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) [2025-03-13 21:26:22,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:22,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:22,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:23,136 INFO L124 PetriNetUnfolderBase]: 337/612 cut-off events. [2025-03-13 21:26:23,136 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2025-03-13 21:26:23,137 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. [2025-03-13 21:26:23,139 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2025-03-13 21:26:23,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2025-03-13 21:26:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:26:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:26:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2025-03-13 21:26:23,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2025-03-13 21:26:23,140 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2025-03-13 21:26:23,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2025-03-13 21:26:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-03-13 21:26:23,145 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2025-03-13 21:26:23,145 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} [2025-03-13 21:26:23,146 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2025-03-13 21:26:23,146 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2025-03-13 21:26:23,146 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) [2025-03-13 21:26:23,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:23,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:23,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:26:23,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:23,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 765975209, now seen corresponding path program 2 times [2025-03-13 21:26:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:23,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249579061] [2025-03-13 21:26:23,147 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:23,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:26:23,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:26:23,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:26:23,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:23,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249579061] [2025-03-13 21:26:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249579061] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:23,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:26:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877615060] [2025-03-13 21:26:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:23,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:26:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:23,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:26:23,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:26:23,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:23,243 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) [2025-03-13 21:26:23,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:23,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:23,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:23,468 INFO L124 PetriNetUnfolderBase]: 445/801 cut-off events. [2025-03-13 21:26:23,469 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2025-03-13 21:26:23,470 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. [2025-03-13 21:26:23,473 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 44 selfloop transitions, 23 changer transitions 30/100 dead transitions. [2025-03-13 21:26:23,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 100 transitions, 739 flow [2025-03-13 21:26:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:26:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:26:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2025-03-13 21:26:23,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-13 21:26:23,474 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 138 transitions. [2025-03-13 21:26:23,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 100 transitions, 739 flow [2025-03-13 21:26:23,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 685 flow, removed 21 selfloop flow, removed 4 redundant places. [2025-03-13 21:26:23,480 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 390 flow [2025-03-13 21:26:23,481 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} [2025-03-13 21:26:23,481 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2025-03-13 21:26:23,481 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 390 flow [2025-03-13 21:26:23,481 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) [2025-03-13 21:26:23,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:23,482 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:23,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-13 21:26:23,482 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:23,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1363386589, now seen corresponding path program 1 times [2025-03-13 21:26:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212433031] [2025-03-13 21:26:23,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:23,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:26:23,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:26:23,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:23,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212433031] [2025-03-13 21:26:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212433031] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397224776] [2025-03-13 21:26:23,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:23,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:26:23,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:26:23,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:26:23,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:23,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:23,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-13 21:26:23,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:23,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397224776] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:23,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-13 21:26:23,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031724650] [2025-03-13 21:26:23,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:23,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:26:23,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:23,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:26:23,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:26:23,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:23,835 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) [2025-03-13 21:26:23,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:23,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:24,223 INFO L124 PetriNetUnfolderBase]: 571/1050 cut-off events. [2025-03-13 21:26:24,223 INFO L125 PetriNetUnfolderBase]: For 6872/6872 co-relation queries the response was YES. [2025-03-13 21:26:24,226 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. [2025-03-13 21:26:24,229 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 64 selfloop transitions, 17 changer transitions 67/151 dead transitions. [2025-03-13 21:26:24,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 151 transitions, 1346 flow [2025-03-13 21:26:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-13 21:26:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-13 21:26:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2025-03-13 21:26:24,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2025-03-13 21:26:24,232 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 390 flow. Second operand 19 states and 231 transitions. [2025-03-13 21:26:24,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 151 transitions, 1346 flow [2025-03-13 21:26:24,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 151 transitions, 1267 flow, removed 32 selfloop flow, removed 5 redundant places. [2025-03-13 21:26:24,245 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 521 flow [2025-03-13 21:26:24,245 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} [2025-03-13 21:26:24,246 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 62 predicate places. [2025-03-13 21:26:24,247 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 521 flow [2025-03-13 21:26:24,247 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) [2025-03-13 21:26:24,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:24,247 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:24,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:26:24,452 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 [2025-03-13 21:26:24,452 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:24,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1919587151, now seen corresponding path program 2 times [2025-03-13 21:26:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606935029] [2025-03-13 21:26:24,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:24,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:26:24,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:26:24,462 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:26:24,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606935029] [2025-03-13 21:26:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606935029] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:26:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732734828] [2025-03-13 21:26:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:24,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:26:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:24,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:26:24,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:26:24,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:24,554 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) [2025-03-13 21:26:24,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:24,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:24,844 INFO L124 PetriNetUnfolderBase]: 652/1217 cut-off events. [2025-03-13 21:26:24,844 INFO L125 PetriNetUnfolderBase]: For 19130/19130 co-relation queries the response was YES. [2025-03-13 21:26:24,848 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. [2025-03-13 21:26:24,852 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 76 selfloop transitions, 23 changer transitions 31/133 dead transitions. [2025-03-13 21:26:24,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1509 flow [2025-03-13 21:26:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:26:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:26:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 187 transitions. [2025-03-13 21:26:24,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2025-03-13 21:26:24,854 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 521 flow. Second operand 15 states and 187 transitions. [2025-03-13 21:26:24,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1509 flow [2025-03-13 21:26:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1211 flow, removed 138 selfloop flow, removed 12 redundant places. [2025-03-13 21:26:24,872 INFO L231 Difference]: Finished difference. Result has 90 places, 57 transitions, 583 flow [2025-03-13 21:26:24,873 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} [2025-03-13 21:26:24,874 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2025-03-13 21:26:24,874 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 57 transitions, 583 flow [2025-03-13 21:26:24,874 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) [2025-03-13 21:26:24,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:24,875 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:24,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:26:24,875 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:24,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash -744688911, now seen corresponding path program 3 times [2025-03-13 21:26:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:24,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118248160] [2025-03-13 21:26:24,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:26:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:24,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-13 21:26:24,886 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:26:24,886 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:26:24,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118248160] [2025-03-13 21:26:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118248160] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567718041] [2025-03-13 21:26:24,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:26:24,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:24,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:24,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:26:24,986 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-13 21:26:24,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:26:24,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:26:24,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:24,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-13 21:26:24,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:25,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567718041] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:25,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-13 21:26:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669306286] [2025-03-13 21:26:25,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:25,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:26:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:25,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:26:25,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:26:25,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:25,138 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) [2025-03-13 21:26:25,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:25,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:25,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:25,691 INFO L124 PetriNetUnfolderBase]: 841/1529 cut-off events. [2025-03-13 21:26:25,692 INFO L125 PetriNetUnfolderBase]: For 24317/24317 co-relation queries the response was YES. [2025-03-13 21:26:25,696 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. [2025-03-13 21:26:25,701 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 49 changer transitions 83/214 dead transitions. [2025-03-13 21:26:25,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 214 transitions, 2477 flow [2025-03-13 21:26:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-13 21:26:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-13 21:26:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 321 transitions. [2025-03-13 21:26:25,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2025-03-13 21:26:25,703 INFO L175 Difference]: Start difference. First operand has 90 places, 57 transitions, 583 flow. Second operand 26 states and 321 transitions. [2025-03-13 21:26:25,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 214 transitions, 2477 flow [2025-03-13 21:26:25,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 214 transitions, 2253 flow, removed 96 selfloop flow, removed 10 redundant places. [2025-03-13 21:26:25,727 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 953 flow [2025-03-13 21:26:25,727 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} [2025-03-13 21:26:25,728 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2025-03-13 21:26:25,728 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 953 flow [2025-03-13 21:26:25,728 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) [2025-03-13 21:26:25,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:25,728 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:25,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:25,932 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 [2025-03-13 21:26:25,932 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:25,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1992501137, now seen corresponding path program 1 times [2025-03-13 21:26:25,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:25,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134466417] [2025-03-13 21:26:25,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:25,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:26:25,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:26:25,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:25,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134466417] [2025-03-13 21:26:26,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134466417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741556431] [2025-03-13 21:26:26,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:26,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:26,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:26:26,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:26:26,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:26:26,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:26,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:26,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-13 21:26:26,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:26,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741556431] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:26,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-13 21:26:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774135791] [2025-03-13 21:26:26,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:26,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:26:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:26,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:26:26,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:26:26,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:26,269 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) [2025-03-13 21:26:26,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:26,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:26,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:26,973 INFO L124 PetriNetUnfolderBase]: 1327/2416 cut-off events. [2025-03-13 21:26:26,974 INFO L125 PetriNetUnfolderBase]: For 77863/77863 co-relation queries the response was YES. [2025-03-13 21:26:26,982 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. [2025-03-13 21:26:26,990 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 97 selfloop transitions, 80 changer transitions 86/266 dead transitions. [2025-03-13 21:26:26,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 266 transitions, 4124 flow [2025-03-13 21:26:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-13 21:26:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-13 21:26:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 358 transitions. [2025-03-13 21:26:26,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.514367816091954 [2025-03-13 21:26:26,992 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 953 flow. Second operand 29 states and 358 transitions. [2025-03-13 21:26:26,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 266 transitions, 4124 flow [2025-03-13 21:26:27,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 266 transitions, 3416 flow, removed 330 selfloop flow, removed 18 redundant places. [2025-03-13 21:26:27,080 INFO L231 Difference]: Finished difference. Result has 141 places, 106 transitions, 1630 flow [2025-03-13 21:26:27,080 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} [2025-03-13 21:26:27,080 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 115 predicate places. [2025-03-13 21:26:27,081 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 106 transitions, 1630 flow [2025-03-13 21:26:27,081 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) [2025-03-13 21:26:27,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:27,081 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:27,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:27,281 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 [2025-03-13 21:26:27,282 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:27,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1036724742, now seen corresponding path program 2 times [2025-03-13 21:26:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:27,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619711968] [2025-03-13 21:26:27,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:27,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:27,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:26:27,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:27,296 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:27,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619711968] [2025-03-13 21:26:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619711968] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482736402] [2025-03-13 21:26:27,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:27,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:26:27,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:26:27,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:27,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:27,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:27,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:26:27,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:27,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:27,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482736402] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:27,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:27,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-03-13 21:26:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165692964] [2025-03-13 21:26:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:27,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-13 21:26:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:27,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-13 21:26:27,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-03-13 21:26:27,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:27,891 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) [2025-03-13 21:26:27,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:27,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:27,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:28,897 INFO L124 PetriNetUnfolderBase]: 1561/2913 cut-off events. [2025-03-13 21:26:28,897 INFO L125 PetriNetUnfolderBase]: For 172037/172037 co-relation queries the response was YES. [2025-03-13 21:26:28,908 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. [2025-03-13 21:26:28,920 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 35 changer transitions 133/323 dead transitions. [2025-03-13 21:26:28,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 323 transitions, 6273 flow [2025-03-13 21:26:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-13 21:26:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-13 21:26:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 441 transitions. [2025-03-13 21:26:28,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2025-03-13 21:26:28,922 INFO L175 Difference]: Start difference. First operand has 141 places, 106 transitions, 1630 flow. Second operand 37 states and 441 transitions. [2025-03-13 21:26:28,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 323 transitions, 6273 flow [2025-03-13 21:26:29,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 323 transitions, 4779 flow, removed 724 selfloop flow, removed 14 redundant places. [2025-03-13 21:26:29,078 INFO L231 Difference]: Finished difference. Result has 181 places, 120 transitions, 1824 flow [2025-03-13 21:26:29,079 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} [2025-03-13 21:26:29,079 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2025-03-13 21:26:29,079 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 120 transitions, 1824 flow [2025-03-13 21:26:29,079 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) [2025-03-13 21:26:29,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:29,080 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:29,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:29,280 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 [2025-03-13 21:26:29,280 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:29,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -248359850, now seen corresponding path program 3 times [2025-03-13 21:26:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:29,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88372729] [2025-03-13 21:26:29,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:26:29,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:29,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-13 21:26:29,291 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:29,291 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-13 21:26:29,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88372729] [2025-03-13 21:26:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88372729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487822235] [2025-03-13 21:26:29,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:26:29,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:29,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:29,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:29,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:26:29,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-13 21:26:29,477 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:29,477 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-13 21:26:29,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:29,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:26:29,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:29,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:29,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487822235] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:29,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:29,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-03-13 21:26:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802203745] [2025-03-13 21:26:29,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:29,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-13 21:26:29,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:29,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-13 21:26:29,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-13 21:26:29,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:29,808 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) [2025-03-13 21:26:29,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:29,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:29,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:31,057 INFO L124 PetriNetUnfolderBase]: 1957/3799 cut-off events. [2025-03-13 21:26:31,057 INFO L125 PetriNetUnfolderBase]: For 291079/291079 co-relation queries the response was YES. [2025-03-13 21:26:31,071 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. [2025-03-13 21:26:31,084 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 106 changer transitions 147/408 dead transitions. [2025-03-13 21:26:31,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 408 transitions, 8148 flow [2025-03-13 21:26:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-13 21:26:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-13 21:26:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 527 transitions. [2025-03-13 21:26:31,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4990530303030303 [2025-03-13 21:26:31,086 INFO L175 Difference]: Start difference. First operand has 181 places, 120 transitions, 1824 flow. Second operand 44 states and 527 transitions. [2025-03-13 21:26:31,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 408 transitions, 8148 flow [2025-03-13 21:26:31,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 408 transitions, 6881 flow, removed 613 selfloop flow, removed 24 redundant places. [2025-03-13 21:26:31,431 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 2837 flow [2025-03-13 21:26:31,431 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} [2025-03-13 21:26:31,432 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 187 predicate places. [2025-03-13 21:26:31,432 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 2837 flow [2025-03-13 21:26:31,432 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) [2025-03-13 21:26:31,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:31,432 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:31,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:31,632 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 [2025-03-13 21:26:31,633 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:31,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:31,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1040177930, now seen corresponding path program 4 times [2025-03-13 21:26:31,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:31,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190983680] [2025-03-13 21:26:31,634 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:26:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:31,639 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:26:31,648 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:31,651 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:26:31,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:31,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190983680] [2025-03-13 21:26:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190983680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608036508] [2025-03-13 21:26:31,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:26:31,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:31,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:31,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:31,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:26:31,852 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:26:31,863 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:26:31,864 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:26:31,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:31,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:26:31,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:31,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608036508] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:32,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:32,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-13 21:26:32,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979943869] [2025-03-13 21:26:32,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:32,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-13 21:26:32,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:32,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-13 21:26:32,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:26:32,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:32,292 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) [2025-03-13 21:26:32,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:33,978 INFO L124 PetriNetUnfolderBase]: 3433/6569 cut-off events. [2025-03-13 21:26:33,978 INFO L125 PetriNetUnfolderBase]: For 700008/700008 co-relation queries the response was YES. [2025-03-13 21:26:34,010 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. [2025-03-13 21:26:34,035 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 161 selfloop transitions, 235 changer transitions 162/561 dead transitions. [2025-03-13 21:26:34,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 561 transitions, 12693 flow [2025-03-13 21:26:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-13 21:26:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-03-13 21:26:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 607 transitions. [2025-03-13 21:26:34,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5058333333333334 [2025-03-13 21:26:34,040 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 2837 flow. Second operand 50 states and 607 transitions. [2025-03-13 21:26:34,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 561 transitions, 12693 flow [2025-03-13 21:26:35,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 561 transitions, 10864 flow, removed 886 selfloop flow, removed 26 redundant places. [2025-03-13 21:26:35,356 INFO L231 Difference]: Finished difference. Result has 256 places, 278 transitions, 5391 flow [2025-03-13 21:26:35,356 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} [2025-03-13 21:26:35,357 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 230 predicate places. [2025-03-13 21:26:35,357 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 278 transitions, 5391 flow [2025-03-13 21:26:35,357 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) [2025-03-13 21:26:35,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:35,357 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:35,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-13 21:26:35,558 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 [2025-03-13 21:26:35,558 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:35,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1546388459, now seen corresponding path program 5 times [2025-03-13 21:26:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:35,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733472588] [2025-03-13 21:26:35,559 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:26:35,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:35,564 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 6 equivalence classes. [2025-03-13 21:26:35,573 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-13 21:26:35,573 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-13 21:26:35,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:35,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733472588] [2025-03-13 21:26:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733472588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926752391] [2025-03-13 21:26:35,707 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:26:35,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:35,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:35,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:35,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:26:35,737 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 6 equivalence classes. [2025-03-13 21:26:35,748 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-13 21:26:35,749 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-13 21:26:35,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:35,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-13 21:26:35,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:35,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926752391] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:35,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2025-03-13 21:26:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764418789] [2025-03-13 21:26:35,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:35,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-13 21:26:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:35,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-13 21:26:35,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:26:35,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:35,993 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) [2025-03-13 21:26:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:38,636 INFO L124 PetriNetUnfolderBase]: 4819/9213 cut-off events. [2025-03-13 21:26:38,636 INFO L125 PetriNetUnfolderBase]: For 1635604/1635604 co-relation queries the response was YES. [2025-03-13 21:26:38,693 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. [2025-03-13 21:26:38,748 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 198 selfloop transitions, 357 changer transitions 183/741 dead transitions. [2025-03-13 21:26:38,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 741 transitions, 21890 flow [2025-03-13 21:26:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-13 21:26:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-03-13 21:26:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 750 transitions. [2025-03-13 21:26:38,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5122950819672131 [2025-03-13 21:26:38,751 INFO L175 Difference]: Start difference. First operand has 256 places, 278 transitions, 5391 flow. Second operand 61 states and 750 transitions. [2025-03-13 21:26:38,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 741 transitions, 21890 flow [2025-03-13 21:26:41,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 741 transitions, 15904 flow, removed 2955 selfloop flow, removed 25 redundant places. [2025-03-13 21:26:41,840 INFO L231 Difference]: Finished difference. Result has 318 places, 387 transitions, 8332 flow [2025-03-13 21:26:41,841 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} [2025-03-13 21:26:41,841 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 292 predicate places. [2025-03-13 21:26:41,841 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 387 transitions, 8332 flow [2025-03-13 21:26:41,841 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) [2025-03-13 21:26:41,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:41,841 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:41,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-13 21:26:42,042 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 [2025-03-13 21:26:42,042 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:42,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -695864503, now seen corresponding path program 6 times [2025-03-13 21:26:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:42,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689253620] [2025-03-13 21:26:42,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:26:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:42,049 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 11 equivalence classes. [2025-03-13 21:26:42,065 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 66 of 66 statements. [2025-03-13 21:26:42,066 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-13 21:26:42,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:42,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689253620] [2025-03-13 21:26:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689253620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553460687] [2025-03-13 21:26:42,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:26:42,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:42,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:42,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:26:42,388 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 11 equivalence classes. [2025-03-13 21:26:42,408 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 66 of 66 statements. [2025-03-13 21:26:42,408 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-13 21:26:42,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:42,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-13 21:26:42,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:42,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553460687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:42,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2025-03-13 21:26:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837023996] [2025-03-13 21:26:42,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:42,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-13 21:26:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:42,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-13 21:26:42,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2025-03-13 21:26:42,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:42,892 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) [2025-03-13 21:26:42,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:42,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:42,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:48,024 INFO L124 PetriNetUnfolderBase]: 6574/12421 cut-off events. [2025-03-13 21:26:48,024 INFO L125 PetriNetUnfolderBase]: For 3237313/3237313 co-relation queries the response was YES. [2025-03-13 21:26:48,117 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. [2025-03-13 21:26:48,178 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 316 selfloop transitions, 470 changer transitions 329/1118 dead transitions. [2025-03-13 21:26:48,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1118 transitions, 37469 flow [2025-03-13 21:26:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2025-03-13 21:26:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2025-03-13 21:26:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 1284 transitions. [2025-03-13 21:26:48,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2025-03-13 21:26:48,181 INFO L175 Difference]: Start difference. First operand has 318 places, 387 transitions, 8332 flow. Second operand 105 states and 1284 transitions. [2025-03-13 21:26:48,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1118 transitions, 37469 flow [2025-03-13 21:26:52,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1118 transitions, 29014 flow, removed 4177 selfloop flow, removed 27 redundant places. [2025-03-13 21:26:52,686 INFO L231 Difference]: Finished difference. Result has 444 places, 502 transitions, 12264 flow [2025-03-13 21:26:52,687 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} [2025-03-13 21:26:52,687 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 418 predicate places. [2025-03-13 21:26:52,687 INFO L471 AbstractCegarLoop]: Abstraction has has 444 places, 502 transitions, 12264 flow [2025-03-13 21:26:52,688 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) [2025-03-13 21:26:52,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:52,688 INFO L206 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:52,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-13 21:26:52,892 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 [2025-03-13 21:26:52,892 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:26:52,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash 305205859, now seen corresponding path program 7 times [2025-03-13 21:26:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654916518] [2025-03-13 21:26:52,894 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:26:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:52,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-13 21:26:52,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-13 21:26:52,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:52,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:53,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654916518] [2025-03-13 21:26:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654916518] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292377665] [2025-03-13 21:26:53,514 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:26:53,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:53,516 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:53,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:26:53,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-13 21:26:53,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-13 21:26:53,569 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:53,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:53,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-13 21:26:53,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:53,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:54,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292377665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:54,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:54,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2025-03-13 21:26:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481128191] [2025-03-13 21:26:54,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:54,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2025-03-13 21:26:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:54,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2025-03-13 21:26:54,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1354, Invalid=4498, Unknown=0, NotChecked=0, Total=5852 [2025-03-13 21:26:54,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:26:54,329 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) [2025-03-13 21:26:54,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:54,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:26:54,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:27:00,978 INFO L124 PetriNetUnfolderBase]: 8635/16057 cut-off events. [2025-03-13 21:27:00,978 INFO L125 PetriNetUnfolderBase]: For 6562932/6562932 co-relation queries the response was YES. [2025-03-13 21:27:01,132 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. [2025-03-13 21:27:01,292 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 320 selfloop transitions, 631 changer transitions 195/1149 dead transitions. [2025-03-13 21:27:01,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1149 transitions, 43320 flow [2025-03-13 21:27:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-03-13 21:27:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2025-03-13 21:27:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1041 transitions. [2025-03-13 21:27:01,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5043604651162791 [2025-03-13 21:27:01,304 INFO L175 Difference]: Start difference. First operand has 444 places, 502 transitions, 12264 flow. Second operand 86 states and 1041 transitions. [2025-03-13 21:27:01,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1149 transitions, 43320 flow [2025-03-13 21:27:20,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1149 transitions, 28246 flow, removed 7436 selfloop flow, removed 40 redundant places. [2025-03-13 21:27:20,295 INFO L231 Difference]: Finished difference. Result has 486 places, 669 transitions, 13503 flow [2025-03-13 21:27:20,296 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} [2025-03-13 21:27:20,296 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 460 predicate places. [2025-03-13 21:27:20,296 INFO L471 AbstractCegarLoop]: Abstraction has has 486 places, 669 transitions, 13503 flow [2025-03-13 21:27:20,297 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) [2025-03-13 21:27:20,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:20,297 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:27:20,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-13 21:27:20,497 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 [2025-03-13 21:27:20,498 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:27:20,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1000036294, now seen corresponding path program 8 times [2025-03-13 21:27:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166833925] [2025-03-13 21:27:20,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:27:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:20,508 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-13 21:27:20,526 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-13 21:27:20,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:27:20,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:27:21,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166833925] [2025-03-13 21:27:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166833925] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:27:21,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408619316] [2025-03-13 21:27:21,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:27:21,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:27:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:27:21,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:27:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:27:21,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-13 21:27:21,304 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-13 21:27:21,304 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:27:21,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:21,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-13 21:27:21,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:27:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 1 proven. 887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:21,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:27:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:21,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408619316] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:27:21,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:27:21,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 45 [2025-03-13 21:27:21,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777499349] [2025-03-13 21:27:21,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:27:21,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-13 21:27:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:27:21,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-13 21:27:21,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2025-03-13 21:27:21,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:27:21,872 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) [2025-03-13 21:27:21,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:27:21,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:27:21,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:27:28,654 INFO L124 PetriNetUnfolderBase]: 8635/16099 cut-off events. [2025-03-13 21:27:28,655 INFO L125 PetriNetUnfolderBase]: For 5526393/5526393 co-relation queries the response was YES. [2025-03-13 21:27:28,808 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. [2025-03-13 21:27:28,877 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 332 selfloop transitions, 640 changer transitions 183/1158 dead transitions. [2025-03-13 21:27:28,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1158 transitions, 30892 flow [2025-03-13 21:27:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2025-03-13 21:27:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2025-03-13 21:27:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1059 transitions. [2025-03-13 21:27:28,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5014204545454546 [2025-03-13 21:27:28,879 INFO L175 Difference]: Start difference. First operand has 486 places, 669 transitions, 13503 flow. Second operand 88 states and 1059 transitions. [2025-03-13 21:27:28,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1158 transitions, 30892 flow [2025-03-13 21:27:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1158 transitions, 27788 flow, removed 1176 selfloop flow, removed 46 redundant places. [2025-03-13 21:27:41,353 INFO L231 Difference]: Finished difference. Result has 527 places, 676 transitions, 12976 flow [2025-03-13 21:27:41,354 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} [2025-03-13 21:27:41,354 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 501 predicate places. [2025-03-13 21:27:41,354 INFO L471 AbstractCegarLoop]: Abstraction has has 527 places, 676 transitions, 12976 flow [2025-03-13 21:27:41,354 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) [2025-03-13 21:27:41,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:41,355 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:27:41,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-13 21:27:41,555 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 [2025-03-13 21:27:41,555 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:27:41,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1036439336, now seen corresponding path program 9 times [2025-03-13 21:27:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163458750] [2025-03-13 21:27:41,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:27:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:41,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 19 equivalence classes. [2025-03-13 21:27:41,587 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 129 of 129 statements. [2025-03-13 21:27:41,587 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-13 21:27:41,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:27:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163458750] [2025-03-13 21:27:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163458750] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:27:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044953435] [2025-03-13 21:27:42,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:27:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:27:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:27:42,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:27:42,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:27:42,305 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 19 equivalence classes. [2025-03-13 21:27:42,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 129 of 129 statements. [2025-03-13 21:27:42,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-13 21:27:42,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:42,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-13 21:27:42,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:27:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:42,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:27:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:42,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044953435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:27:42,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:27:42,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 44 [2025-03-13 21:27:42,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780526614] [2025-03-13 21:27:42,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:27:42,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-13 21:27:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:27:42,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-13 21:27:42,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2025-03-13 21:27:42,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:27:42,926 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) [2025-03-13 21:27:42,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:27:42,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:27:42,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:27:49,275 INFO L124 PetriNetUnfolderBase]: 8806/16421 cut-off events. [2025-03-13 21:27:49,275 INFO L125 PetriNetUnfolderBase]: For 5490633/5490633 co-relation queries the response was YES. [2025-03-13 21:27:49,482 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. [2025-03-13 21:27:49,553 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 341 selfloop transitions, 648 changer transitions 175/1167 dead transitions. [2025-03-13 21:27:49,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1167 transitions, 30713 flow [2025-03-13 21:27:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2025-03-13 21:27:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2025-03-13 21:27:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 1052 transitions. [2025-03-13 21:27:49,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5038314176245211 [2025-03-13 21:27:49,559 INFO L175 Difference]: Start difference. First operand has 527 places, 676 transitions, 12976 flow. Second operand 87 states and 1052 transitions. [2025-03-13 21:27:49,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1167 transitions, 30713 flow