./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:31:41,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:31:41,210 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:31:41,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:31:41,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:31:41,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:31:41,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:31:41,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:31:41,236 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:31:41,236 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:31:41,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:31:41,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:31:41,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:31:41,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:31:41,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:31:41,238 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:31:41,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:31:41,238 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:31:41,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:31:41,239 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 -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2025-03-17 06:31:41,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:31:41,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:31:41,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:31:41,434 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:31:41,435 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:31:41,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2025-03-17 06:31:42,537 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c14f542/50db73b389ae42adb0fc5cdeb2242d4b/FLAGc44c75baa [2025-03-17 06:31:42,868 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:31:42,869 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2025-03-17 06:31:42,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c14f542/50db73b389ae42adb0fc5cdeb2242d4b/FLAGc44c75baa [2025-03-17 06:31:42,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c14f542/50db73b389ae42adb0fc5cdeb2242d4b [2025-03-17 06:31:42,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:31:42,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:31:42,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:31:42,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:31:42,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:31:42,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:31:42" (1/1) ... [2025-03-17 06:31:42,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307f70cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:42, skipping insertion in model container [2025-03-17 06:31:42,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:31:42" (1/1) ... [2025-03-17 06:31:42,946 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:31:43,073 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-03-17 06:31:43,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:31:43,453 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:31:43,460 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-03-17 06:31:43,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:31:43,551 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:31:43,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43 WrapperNode [2025-03-17 06:31:43,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:31:43,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:31:43,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:31:43,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:31:43,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,594 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2025-03-17 06:31:43,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:31:43,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:31:43,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:31:43,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:31:43,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,604 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,618 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2025-03-17 06:31:43,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,622 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:31:43,626 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:31:43,626 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:31:43,626 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:31:43,627 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (1/1) ... [2025-03-17 06:31:43,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:31:43,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:43,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:31:43,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:31:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 06:31:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 06:31:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:31:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2025-03-17 06:31:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2025-03-17 06:31:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:31:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:31:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:31:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:31:43,676 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:31:43,777 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:31:43,778 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:31:43,921 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:31:43,922 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:31:43,996 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:31:43,996 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:31:43,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:31:43 BoogieIcfgContainer [2025-03-17 06:31:43,997 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:31:43,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:31:43,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:31:44,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:31:44,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:31:42" (1/3) ... [2025-03-17 06:31:44,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23665ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:31:44, skipping insertion in model container [2025-03-17 06:31:44,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:31:43" (2/3) ... [2025-03-17 06:31:44,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23665ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:31:44, skipping insertion in model container [2025-03-17 06:31:44,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:31:43" (3/3) ... [2025-03-17 06:31:44,005 INFO L128 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2025-03-17 06:31:44,017 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:31:44,020 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pthread-demo-datarace-1.i that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-17 06:31:44,020 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:31:44,064 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-17 06:31:44,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2025-03-17 06:31:44,112 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2025-03-17 06:31:44,114 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:31:44,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-03-17 06:31:44,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2025-03-17 06:31:44,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2025-03-17 06:31:44,127 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:31:44,143 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;@5faa4717, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:31:44,143 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-03-17 06:31:44,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:31:44,156 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-03-17 06:31:44,157 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:31:44,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:44,158 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:44,159 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:44,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1812078316, now seen corresponding path program 1 times [2025-03-17 06:31:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925712629] [2025-03-17 06:31:44,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:31:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:44,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 06:31:44,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 06:31:44,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:31:44,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:31:44,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:44,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925712629] [2025-03-17 06:31:44,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925712629] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:31:44,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:31:44,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:31:44,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356708661] [2025-03-17 06:31:44,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:31:44,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:31:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:44,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:31:44,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:31:44,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:31:44,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:44,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:31:44,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:44,512 INFO L124 PetriNetUnfolderBase]: 61/134 cut-off events. [2025-03-17 06:31:44,515 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:31:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 134 events. 61/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 409 event pairs, 27 based on Foata normal form. 6/139 useless extension candidates. Maximal degree in co-relation 248. Up to 77 conditions per place. [2025-03-17 06:31:44,518 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2025-03-17 06:31:44,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2025-03-17 06:31:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:31:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:31:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-17 06:31:44,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 06:31:44,529 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2025-03-17 06:31:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2025-03-17 06:31:44,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:31:44,536 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2025-03-17 06:31:44,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2025-03-17 06:31:44,541 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2025-03-17 06:31:44,541 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2025-03-17 06:31:44,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:44,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:44,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:31:44,544 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:44,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1974659103, now seen corresponding path program 1 times [2025-03-17 06:31:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521339162] [2025-03-17 06:31:44,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:31:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:44,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:31:44,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:31:44,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:31:44,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:31:44,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:44,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521339162] [2025-03-17 06:31:44,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521339162] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:31:44,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:31:44,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:31:44,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599640136] [2025-03-17 06:31:44,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:31:44,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:31:44,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:44,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:31:44,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:31:44,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-03-17 06:31:44,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:44,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-03-17 06:31:44,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:44,745 INFO L124 PetriNetUnfolderBase]: 91/207 cut-off events. [2025-03-17 06:31:44,745 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-03-17 06:31:44,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 207 events. 91/207 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 727 event pairs, 46 based on Foata normal form. 9/216 useless extension candidates. Maximal degree in co-relation 144. Up to 113 conditions per place. [2025-03-17 06:31:44,747 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2025-03-17 06:31:44,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 134 flow [2025-03-17 06:31:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:31:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:31:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-03-17 06:31:44,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-03-17 06:31:44,751 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 46 transitions. [2025-03-17 06:31:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 134 flow [2025-03-17 06:31:44,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:31:44,753 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2025-03-17 06:31:44,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2025-03-17 06:31:44,753 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2025-03-17 06:31:44,753 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2025-03-17 06:31:44,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:44,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:44,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:31:44,754 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:44,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 490936942, now seen corresponding path program 1 times [2025-03-17 06:31:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738779707] [2025-03-17 06:31:44,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:31:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:44,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:31:44,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:31:44,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:31:44,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:31:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738779707] [2025-03-17 06:31:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738779707] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:31:44,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:31:44,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:31:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546735641] [2025-03-17 06:31:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:31:44,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:31:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:44,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:31:44,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:31:44,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-03-17 06:31:44,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:44,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-03-17 06:31:44,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:44,928 INFO L124 PetriNetUnfolderBase]: 59/153 cut-off events. [2025-03-17 06:31:44,929 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2025-03-17 06:31:44,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 153 events. 59/153 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 469 event pairs, 20 based on Foata normal form. 16/168 useless extension candidates. Maximal degree in co-relation 117. Up to 72 conditions per place. [2025-03-17 06:31:44,932 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 20 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2025-03-17 06:31:44,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 142 flow [2025-03-17 06:31:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:31:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:31:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2025-03-17 06:31:44,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-03-17 06:31:44,934 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 43 transitions. [2025-03-17 06:31:44,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 142 flow [2025-03-17 06:31:44,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:31:44,936 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2025-03-17 06:31:44,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-03-17 06:31:44,937 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2025-03-17 06:31:44,937 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2025-03-17 06:31:44,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:44,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:44,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:44,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:31:44,938 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:44,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 730792178, now seen corresponding path program 2 times [2025-03-17 06:31:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:44,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244652583] [2025-03-17 06:31:44,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:31:44,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:44,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:31:44,960 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:31:44,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:31:44,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:31:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244652583] [2025-03-17 06:31:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244652583] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:31:45,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:31:45,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:31:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944117177] [2025-03-17 06:31:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:31:45,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:31:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:45,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:31:45,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:31:45,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-03-17 06:31:45,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:45,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:45,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-03-17 06:31:45,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:45,096 INFO L124 PetriNetUnfolderBase]: 79/214 cut-off events. [2025-03-17 06:31:45,098 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-03-17 06:31:45,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 79/214 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 727 event pairs, 20 based on Foata normal form. 9/223 useless extension candidates. Maximal degree in co-relation 183. Up to 89 conditions per place. [2025-03-17 06:31:45,100 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 33 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2025-03-17 06:31:45,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 210 flow [2025-03-17 06:31:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:31:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:31:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-03-17 06:31:45,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-03-17 06:31:45,102 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 4 states and 62 transitions. [2025-03-17 06:31:45,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 210 flow [2025-03-17 06:31:45,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:31:45,104 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 82 flow [2025-03-17 06:31:45,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2025-03-17 06:31:45,105 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2025-03-17 06:31:45,105 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 82 flow [2025-03-17 06:31:45,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:45,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:45,106 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:45,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:31:45,106 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:45,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1447854271, now seen corresponding path program 3 times [2025-03-17 06:31:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311078068] [2025-03-17 06:31:45,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:31:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:45,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-17 06:31:45,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 25 statements. [2025-03-17 06:31:45,125 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:31:45,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 06:31:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311078068] [2025-03-17 06:31:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311078068] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:31:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:31:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:31:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048625339] [2025-03-17 06:31:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:31:45,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:31:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:45,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:31:45,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:31:45,172 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:31:45,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2025-03-17 06:31:45,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:45,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:31:45,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:45,258 INFO L124 PetriNetUnfolderBase]: 125/328 cut-off events. [2025-03-17 06:31:45,258 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2025-03-17 06:31:45,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 328 events. 125/328 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1282 event pairs, 35 based on Foata normal form. 14/341 useless extension candidates. Maximal degree in co-relation 269. Up to 137 conditions per place. [2025-03-17 06:31:45,261 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 39 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2025-03-17 06:31:45,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 266 flow [2025-03-17 06:31:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:31:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:31:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-03-17 06:31:45,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-03-17 06:31:45,262 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 82 flow. Second operand 4 states and 61 transitions. [2025-03-17 06:31:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 266 flow [2025-03-17 06:31:45,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-17 06:31:45,264 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 92 flow [2025-03-17 06:31:45,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2025-03-17 06:31:45,264 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2025-03-17 06:31:45,264 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 92 flow [2025-03-17 06:31:45,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2025-03-17 06:31:45,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:45,265 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:45,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:31:45,265 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:45,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -515079110, now seen corresponding path program 4 times [2025-03-17 06:31:45,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:45,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389876799] [2025-03-17 06:31:45,268 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:31:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:45,283 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-17 06:31:45,296 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:31:45,296 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:31:45,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 06:31:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389876799] [2025-03-17 06:31:45,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389876799] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:31:45,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281453158] [2025-03-17 06:31:45,371 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:31:45,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:45,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:45,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:31:45,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:31:45,425 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-17 06:31:45,447 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:31:45,447 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:31:45,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:45,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:31:45,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:31:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 06:31:45,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:31:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 06:31:45,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281453158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:31:45,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:31:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-17 06:31:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880328325] [2025-03-17 06:31:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:31:45,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:31:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:45,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:31:45,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:31:45,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:31:45,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:45,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:45,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:31:45,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:45,726 INFO L124 PetriNetUnfolderBase]: 319/729 cut-off events. [2025-03-17 06:31:45,726 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2025-03-17 06:31:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 729 events. 319/729 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2843 event pairs, 35 based on Foata normal form. 56/785 useless extension candidates. Maximal degree in co-relation 775. Up to 132 conditions per place. [2025-03-17 06:31:45,731 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 85 selfloop transitions, 8 changer transitions 0/96 dead transitions. [2025-03-17 06:31:45,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 96 transitions, 552 flow [2025-03-17 06:31:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:31:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:31:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-17 06:31:45,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2025-03-17 06:31:45,732 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 92 flow. Second operand 8 states and 123 transitions. [2025-03-17 06:31:45,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 96 transitions, 552 flow [2025-03-17 06:31:45,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 96 transitions, 546 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-17 06:31:45,735 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 144 flow [2025-03-17 06:31:45,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=144, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2025-03-17 06:31:45,735 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2025-03-17 06:31:45,735 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 144 flow [2025-03-17 06:31:45,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:45,738 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:45,738 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:45,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:31:45,943 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 [2025-03-17 06:31:45,943 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:45,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1924004552, now seen corresponding path program 5 times [2025-03-17 06:31:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:45,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426535382] [2025-03-17 06:31:45,944 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:31:45,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:45,962 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 6 equivalence classes. [2025-03-17 06:31:45,985 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 06:31:45,985 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 06:31:45,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:31:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426535382] [2025-03-17 06:31:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426535382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:31:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17694015] [2025-03-17 06:31:46,148 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:31:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:46,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:31:46,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:31:46,210 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 6 equivalence classes. [2025-03-17 06:31:46,244 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 06:31:46,244 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 06:31:46,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:46,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:31:46,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:31:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:31:46,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:31:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:31:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17694015] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:31:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:31:46,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-17 06:31:46,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640018649] [2025-03-17 06:31:46,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:31:46,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:31:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:46,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:31:46,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:31:46,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:31:46,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 144 flow. Second operand has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:46,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:46,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:31:46,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:46,875 INFO L124 PetriNetUnfolderBase]: 687/1551 cut-off events. [2025-03-17 06:31:46,875 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2025-03-17 06:31:46,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5143 conditions, 1551 events. 687/1551 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6386 event pairs, 20 based on Foata normal form. 112/1663 useless extension candidates. Maximal degree in co-relation 2297. Up to 292 conditions per place. [2025-03-17 06:31:46,884 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 181 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2025-03-17 06:31:46,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 200 transitions, 1266 flow [2025-03-17 06:31:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 06:31:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 06:31:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 255 transitions. [2025-03-17 06:31:46,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6640625 [2025-03-17 06:31:46,886 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 144 flow. Second operand 16 states and 255 transitions. [2025-03-17 06:31:46,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 200 transitions, 1266 flow [2025-03-17 06:31:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 200 transitions, 1214 flow, removed 24 selfloop flow, removed 2 redundant places. [2025-03-17 06:31:46,893 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 248 flow [2025-03-17 06:31:46,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=248, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2025-03-17 06:31:46,894 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2025-03-17 06:31:46,894 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 248 flow [2025-03-17 06:31:46,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:46,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:46,895 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:46,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:31:47,095 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,SelfDestructingSolverStorable6 [2025-03-17 06:31:47,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:47,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1762237164, now seen corresponding path program 6 times [2025-03-17 06:31:47,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:47,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948703668] [2025-03-17 06:31:47,097 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:31:47,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:47,117 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 15 equivalence classes. [2025-03-17 06:31:47,124 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 90 statements. [2025-03-17 06:31:47,125 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:31:47,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-03-17 06:31:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948703668] [2025-03-17 06:31:47,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948703668] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:31:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914021609] [2025-03-17 06:31:47,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:31:47,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:47,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:31:47,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:31:47,237 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 15 equivalence classes. [2025-03-17 06:31:47,254 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 90 statements. [2025-03-17 06:31:47,254 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:31:47,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:47,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:31:47,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:31:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-03-17 06:31:47,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:31:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-03-17 06:31:47,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914021609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:31:47,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:31:47,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-17 06:31:47,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263156179] [2025-03-17 06:31:47,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:31:47,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:31:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:47,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:31:47,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:31:47,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:31:47,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 248 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:47,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:47,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:31:47,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:47,755 INFO L124 PetriNetUnfolderBase]: 1213/2833 cut-off events. [2025-03-17 06:31:47,755 INFO L125 PetriNetUnfolderBase]: For 5257/5257 co-relation queries the response was YES. [2025-03-17 06:31:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8848 conditions, 2833 events. 1213/2833 cut-off events. For 5257/5257 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 15331 event pairs, 86 based on Foata normal form. 232/3065 useless extension candidates. Maximal degree in co-relation 7860. Up to 495 conditions per place. [2025-03-17 06:31:47,772 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 155 selfloop transitions, 8 changer transitions 0/169 dead transitions. [2025-03-17 06:31:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 169 transitions, 1520 flow [2025-03-17 06:31:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:31:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:31:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2025-03-17 06:31:47,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-03-17 06:31:47,774 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 248 flow. Second operand 8 states and 124 transitions. [2025-03-17 06:31:47,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 169 transitions, 1520 flow [2025-03-17 06:31:47,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 169 transitions, 1450 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 06:31:47,785 INFO L231 Difference]: Finished difference. Result has 70 places, 41 transitions, 296 flow [2025-03-17 06:31:47,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=41} [2025-03-17 06:31:47,787 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 48 predicate places. [2025-03-17 06:31:47,787 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 296 flow [2025-03-17 06:31:47,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:47,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:47,788 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:47,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:31:47,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:47,989 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:47,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 226859280, now seen corresponding path program 7 times [2025-03-17 06:31:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321387787] [2025-03-17 06:31:47,989 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:31:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:48,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-17 06:31:48,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-17 06:31:48,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:31:48,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-17 06:31:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:48,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321387787] [2025-03-17 06:31:48,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321387787] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:31:48,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151954465] [2025-03-17 06:31:48,247 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:31:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:48,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:31:48,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:31:48,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-17 06:31:48,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-17 06:31:48,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:31:48,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:48,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:31:48,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:31:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-17 06:31:48,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:31:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-17 06:31:48,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151954465] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:31:48,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:31:48,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-17 06:31:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738786995] [2025-03-17 06:31:48,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:31:48,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:31:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:48,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:31:48,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:31:48,581 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:31:48,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 41 transitions, 296 flow. Second operand has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:48,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:48,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:31:48,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:31:49,355 INFO L124 PetriNetUnfolderBase]: 2601/6155 cut-off events. [2025-03-17 06:31:49,355 INFO L125 PetriNetUnfolderBase]: For 17634/17634 co-relation queries the response was YES. [2025-03-17 06:31:49,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22174 conditions, 6155 events. 2601/6155 cut-off events. For 17634/17634 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 37158 event pairs, 156 based on Foata normal form. 464/6619 useless extension candidates. Maximal degree in co-relation 19749. Up to 1095 conditions per place. [2025-03-17 06:31:49,396 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 331 selfloop transitions, 16 changer transitions 0/353 dead transitions. [2025-03-17 06:31:49,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 353 transitions, 3146 flow [2025-03-17 06:31:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 06:31:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 06:31:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 256 transitions. [2025-03-17 06:31:49,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 06:31:49,403 INFO L175 Difference]: Start difference. First operand has 70 places, 41 transitions, 296 flow. Second operand 16 states and 256 transitions. [2025-03-17 06:31:49,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 353 transitions, 3146 flow [2025-03-17 06:31:49,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 353 transitions, 3094 flow, removed 24 selfloop flow, removed 2 redundant places. [2025-03-17 06:31:49,430 INFO L231 Difference]: Finished difference. Result has 92 places, 50 transitions, 400 flow [2025-03-17 06:31:49,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=400, PETRI_PLACES=92, PETRI_TRANSITIONS=50} [2025-03-17 06:31:49,431 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2025-03-17 06:31:49,431 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 50 transitions, 400 flow [2025-03-17 06:31:49,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:49,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:31:49,436 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:31:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:31:49,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:49,637 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:31:49,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:31:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1540580598, now seen corresponding path program 8 times [2025-03-17 06:31:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:31:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191950405] [2025-03-17 06:31:49,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:31:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:31:49,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 150 statements into 2 equivalence classes. [2025-03-17 06:31:49,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 150 of 150 statements. [2025-03-17 06:31:49,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:31:49,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2025-03-17 06:31:50,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:31:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191950405] [2025-03-17 06:31:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191950405] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:31:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655384430] [2025-03-17 06:31:50,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:31:50,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:31:50,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:31:50,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:31:50,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:31:50,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 150 statements into 2 equivalence classes. [2025-03-17 06:31:50,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 150 of 150 statements. [2025-03-17 06:31:50,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:31:50,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:31:50,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 06:31:50,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:31:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2025-03-17 06:31:50,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:31:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2025-03-17 06:31:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655384430] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:31:50,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:31:50,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2025-03-17 06:31:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545876061] [2025-03-17 06:31:50,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:31:50,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-17 06:31:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:31:50,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-17 06:31:50,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 06:31:51,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:31:51,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 50 transitions, 400 flow. Second operand has 37 states, 37 states have (on average 10.0) internal successors, (370), 37 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:31:51,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:31:51,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:31:51,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:32:03,404 INFO L124 PetriNetUnfolderBase]: 4239/9918 cut-off events. [2025-03-17 06:32:03,404 INFO L125 PetriNetUnfolderBase]: For 78434/78434 co-relation queries the response was YES. [2025-03-17 06:32:03,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39011 conditions, 9918 events. 4239/9918 cut-off events. For 78434/78434 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 62116 event pairs, 8 based on Foata normal form. 499/10417 useless extension candidates. Maximal degree in co-relation 29357. Up to 1751 conditions per place. [2025-03-17 06:32:03,462 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2350 selfloop transitions, 688 changer transitions 0/3043 dead transitions. [2025-03-17 06:32:03,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 3043 transitions, 21274 flow [2025-03-17 06:32:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2025-03-17 06:32:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2025-03-17 06:32:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 4840 transitions. [2025-03-17 06:32:03,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984174085064293 [2025-03-17 06:32:03,483 INFO L175 Difference]: Start difference. First operand has 92 places, 50 transitions, 400 flow. Second operand 337 states and 4840 transitions. [2025-03-17 06:32:03,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 3043 transitions, 21274 flow [2025-03-17 06:32:03,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 3043 transitions, 21114 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 06:32:03,556 INFO L231 Difference]: Finished difference. Result has 549 places, 729 transitions, 8630 flow [2025-03-17 06:32:03,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=8630, PETRI_PLACES=549, PETRI_TRANSITIONS=729} [2025-03-17 06:32:03,557 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 527 predicate places. [2025-03-17 06:32:03,558 INFO L471 AbstractCegarLoop]: Abstraction has has 549 places, 729 transitions, 8630 flow [2025-03-17 06:32:03,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.0) internal successors, (370), 37 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:32:03,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:32:03,558 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:32:03,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:32:03,759 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,SelfDestructingSolverStorable9 [2025-03-17 06:32:03,760 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:32:03,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:32:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash -83358679, now seen corresponding path program 9 times [2025-03-17 06:32:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:32:03,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470315601] [2025-03-17 06:32:03,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:32:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:32:03,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 21 equivalence classes. [2025-03-17 06:32:03,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 160 of 185 statements. [2025-03-17 06:32:03,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-17 06:32:03,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:32:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-03-17 06:32:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:32:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470315601] [2025-03-17 06:32:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470315601] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:32:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806524143] [2025-03-17 06:32:04,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:32:04,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:32:04,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:32:04,268 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) [2025-03-17 06:32:04,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:32:04,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 21 equivalence classes. [2025-03-17 06:32:04,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 160 of 185 statements. [2025-03-17 06:32:04,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-17 06:32:04,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:32:04,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 06:32:04,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:32:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-03-17 06:32:04,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:32:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-03-17 06:32:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806524143] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:32:05,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:32:05,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2025-03-17 06:32:05,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041044545] [2025-03-17 06:32:05,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:32:05,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:32:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:32:05,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:32:05,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:32:05,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:32:05,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 729 transitions, 8630 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:32:05,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:32:05,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:32:05,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:32:08,839 INFO L124 PetriNetUnfolderBase]: 5329/12507 cut-off events. [2025-03-17 06:32:08,839 INFO L125 PetriNetUnfolderBase]: For 968098/968098 co-relation queries the response was YES. [2025-03-17 06:32:08,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67187 conditions, 12507 events. 5329/12507 cut-off events. For 968098/968098 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 82424 event pairs, 298 based on Foata normal form. 415/12904 useless extension candidates. Maximal degree in co-relation 62467. Up to 2163 conditions per place. [2025-03-17 06:32:08,998 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1073 dead transitions. [2025-03-17 06:32:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1073 transitions, 17850 flow [2025-03-17 06:32:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 06:32:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 06:32:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 348 transitions. [2025-03-17 06:32:09,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2025-03-17 06:32:09,000 INFO L175 Difference]: Start difference. First operand has 549 places, 729 transitions, 8630 flow. Second operand 22 states and 348 transitions. [2025-03-17 06:32:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1073 transitions, 17850 flow [2025-03-17 06:32:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1073 transitions, 16758 flow, removed 0 selfloop flow, removed 26 redundant places. [2025-03-17 06:32:11,232 INFO L231 Difference]: Finished difference. Result has 550 places, 814 transitions, 9836 flow [2025-03-17 06:32:11,233 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7668, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9836, PETRI_PLACES=550, PETRI_TRANSITIONS=814} [2025-03-17 06:32:11,233 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2025-03-17 06:32:11,233 INFO L471 AbstractCegarLoop]: Abstraction has has 550 places, 814 transitions, 9836 flow [2025-03-17 06:32:11,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:32:11,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:32:11,234 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:32:11,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:32:11,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:32:11,434 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:32:11,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:32:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1852915922, now seen corresponding path program 10 times [2025-03-17 06:32:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:32:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212513256] [2025-03-17 06:32:11,436 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:32:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:32:11,465 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-03-17 06:32:11,511 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-03-17 06:32:11,511 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:32:11,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:32:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:32:13,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:32:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212513256] [2025-03-17 06:32:13,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212513256] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:32:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640186527] [2025-03-17 06:32:13,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:32:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:32:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:32:13,504 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) [2025-03-17 06:32:13,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:32:13,610 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-03-17 06:32:13,719 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-03-17 06:32:13,719 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:32:13,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:32:13,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-03-17 06:32:13,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:32:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:32:13,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:32:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:32:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640186527] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:32:14,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:32:14,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2025-03-17 06:32:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843071019] [2025-03-17 06:32:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:32:14,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-17 06:32:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:32:14,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-17 06:32:14,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2025-03-17 06:32:14,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:32:14,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 814 transitions, 9836 flow. Second operand has 45 states, 45 states have (on average 8.777777777777779) internal successors, (395), 45 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:32:14,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:32:14,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:32:14,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:32:26,818 INFO L124 PetriNetUnfolderBase]: 8401/22289 cut-off events. [2025-03-17 06:32:26,819 INFO L125 PetriNetUnfolderBase]: For 6053790/6053810 co-relation queries the response was YES. [2025-03-17 06:32:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213781 conditions, 22289 events. 8401/22289 cut-off events. For 6053790/6053810 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 177014 event pairs, 1183 based on Foata normal form. 1/22254 useless extension candidates. Maximal degree in co-relation 205016. Up to 4068 conditions per place. [2025-03-17 06:32:27,140 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2983 selfloop transitions, 83 changer transitions 2/3093 dead transitions. [2025-03-17 06:32:27,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 3093 transitions, 46093 flow [2025-03-17 06:32:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-17 06:32:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-17 06:32:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 666 transitions. [2025-03-17 06:32:27,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2025-03-17 06:32:27,143 INFO L175 Difference]: Start difference. First operand has 550 places, 814 transitions, 9836 flow. Second operand 44 states and 666 transitions. [2025-03-17 06:32:27,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 3093 transitions, 46093 flow [2025-03-17 06:33:13,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 3093 transitions, 44023 flow, removed 0 selfloop flow, removed 15 redundant places. [2025-03-17 06:33:13,063 INFO L231 Difference]: Finished difference. Result has 580 places, 896 transitions, 9548 flow [2025-03-17 06:33:13,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9548, PETRI_PLACES=580, PETRI_TRANSITIONS=896} [2025-03-17 06:33:13,065 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 558 predicate places. [2025-03-17 06:33:13,065 INFO L471 AbstractCegarLoop]: Abstraction has has 580 places, 896 transitions, 9548 flow [2025-03-17 06:33:13,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 8.777777777777779) internal successors, (395), 45 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:33:13,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:33:13,065 INFO L206 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:33:13,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:33:13,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:33:13,266 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:33:13,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:33:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash -424001599, now seen corresponding path program 11 times [2025-03-17 06:33:13,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:33:13,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727358316] [2025-03-17 06:33:13,268 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:33:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:33:13,293 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 215 statements into 23 equivalence classes. [2025-03-17 06:33:13,343 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) and asserted 215 of 215 statements. [2025-03-17 06:33:13,343 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2025-03-17 06:33:13,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:33:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 1410 proven. 0 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2025-03-17 06:33:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:33:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727358316] [2025-03-17 06:33:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727358316] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:33:13,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:33:13,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2025-03-17 06:33:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138880071] [2025-03-17 06:33:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:33:13,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:33:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:33:13,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:33:13,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:33:13,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-03-17 06:33:13,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 896 transitions, 9548 flow. Second operand has 23 states, 23 states have (on average 11.043478260869565) internal successors, (254), 23 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:33:13,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:33:13,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-03-17 06:33:13,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand