./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-11.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 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 07:59:43,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 07:59:43,841 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 07:59:43,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 07:59:43,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 07:59:43,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 07:59:43,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 07:59:43,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 07:59:43,891 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 07:59:43,893 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 07:59:43,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 07:59:43,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 07:59:43,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 07:59:43,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 07:59:43,895 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 07:59:43,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 07:59:43,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 07:59:43,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 07:59:43,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 07:59:43,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 07:59:43,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 07:59:43,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 07:59:43,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 07:59:43,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 07:59:43,902 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 07:59:43,902 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 07:59:43,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 07:59:43,903 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 07:59:43,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 07:59:43,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 07:59:43,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 07:59:43,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 07:59:43,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 07:59:43,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 07:59:43,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 07:59:43,905 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 07:59:43,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 07:59:43,907 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2024-11-12 07:59:44,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 07:59:44,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 07:59:44,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 07:59:44,195 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 07:59:44,196 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 07:59:44,197 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-11.i [2024-11-12 07:59:45,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 07:59:45,937 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 07:59:45,940 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-11.i [2024-11-12 07:59:45,956 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d3b1282/4b872f89a0be4b3f9a01c65792b06a0b/FLAG8526c03ca [2024-11-12 07:59:45,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d3b1282/4b872f89a0be4b3f9a01c65792b06a0b [2024-11-12 07:59:45,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 07:59:45,973 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 07:59:45,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 07:59:45,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 07:59:45,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 07:59:45,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:59:45" (1/1) ... [2024-11-12 07:59:45,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7236477f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:45, skipping insertion in model container [2024-11-12 07:59:45,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:59:45" (1/1) ... [2024-11-12 07:59:46,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 07:59:46,332 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2024-11-12 07:59:46,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 07:59:46,369 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 07:59:46,418 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2024-11-12 07:59:46,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 07:59:46,470 INFO L204 MainTranslator]: Completed translation [2024-11-12 07:59:46,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46 WrapperNode [2024-11-12 07:59:46,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 07:59:46,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 07:59:46,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 07:59:46,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 07:59:46,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,514 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2024-11-12 07:59:46,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 07:59:46,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 07:59:46,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 07:59:46,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 07:59:46,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,541 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-12 07:59:46,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,558 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 07:59:46,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 07:59:46,561 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 07:59:46,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 07:59:46,562 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (1/1) ... [2024-11-12 07:59:46,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 07:59:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:46,600 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) [2024-11-12 07:59:46,608 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 [2024-11-12 07:59:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-12 07:59:46,660 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-12 07:59:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-12 07:59:46,661 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-12 07:59:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 07:59:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 07:59:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 07:59:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 07:59:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 07:59:46,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 07:59:46,665 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 07:59:46,810 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 07:59:46,814 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 07:59:46,988 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 07:59:46,988 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 07:59:47,117 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 07:59:47,117 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 07:59:47,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:59:47 BoogieIcfgContainer [2024-11-12 07:59:47,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 07:59:47,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 07:59:47,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 07:59:47,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 07:59:47,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:59:45" (1/3) ... [2024-11-12 07:59:47,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4027dc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:59:47, skipping insertion in model container [2024-11-12 07:59:47,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:46" (2/3) ... [2024-11-12 07:59:47,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4027dc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:59:47, skipping insertion in model container [2024-11-12 07:59:47,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:59:47" (3/3) ... [2024-11-12 07:59:47,129 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2024-11-12 07:59:47,145 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 07:59:47,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 07:59:47,147 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 07:59:47,191 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 07:59:47,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-11-12 07:59:47,260 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-12 07:59:47,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 07:59:47,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-12 07:59:47,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-11-12 07:59:47,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-11-12 07:59:47,277 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 07:59:47,282 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;@78977822, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 07:59:47,283 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 07:59:47,291 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 07:59:47,291 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-12 07:59:47,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 07:59:47,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:47,293 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:47,293 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:47,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:47,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1327058361, now seen corresponding path program 1 times [2024-11-12 07:59:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:47,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435881763] [2024-11-12 07:59:47,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435881763] [2024-11-12 07:59:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435881763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 07:59:47,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 07:59:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 07:59:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790557481] [2024-11-12 07:59:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 07:59:47,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 07:59:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 07:59:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 07:59:47,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-12 07:59:47,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-12 07:59:47,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:47,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-12 07:59:47,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:47,727 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-11-12 07:59:47,727 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 07:59:47,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 691 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-11-12 07:59:47,732 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-11-12 07:59:47,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-11-12 07:59:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 07:59:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 07:59:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-12 07:59:47,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-12 07:59:47,743 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2024-11-12 07:59:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2024-11-12 07:59:47,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 07:59:47,748 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2024-11-12 07:59:47,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-11-12 07:59:47,753 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-12 07:59:47,755 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2024-11-12 07:59:47,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-12 07:59:47,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:47,756 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:47,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 07:59:47,757 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:47,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1785420741, now seen corresponding path program 1 times [2024-11-12 07:59:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727751463] [2024-11-12 07:59:47,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:47,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727751463] [2024-11-12 07:59:47,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727751463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026177286] [2024-11-12 07:59:47,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:47,904 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) [2024-11-12 07:59:47,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 07:59:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:48,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 07:59:48,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:48,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:48,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026177286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:48,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-12 07:59:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372466202] [2024-11-12 07:59:48,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:48,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 07:59:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 07:59:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 07:59:48,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-12 07:59:48,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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) [2024-11-12 07:59:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-12 07:59:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:48,236 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-11-12 07:59:48,237 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 07:59:48,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 799 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-11-12 07:59:48,240 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-11-12 07:59:48,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2024-11-12 07:59:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 07:59:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 07:59:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-12 07:59:48,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-11-12 07:59:48,244 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2024-11-12 07:59:48,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2024-11-12 07:59:48,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 07:59:48,249 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2024-11-12 07:59:48,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-11-12 07:59:48,250 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-12 07:59:48,250 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2024-11-12 07:59:48,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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) [2024-11-12 07:59:48,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:48,251 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:48,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 07:59:48,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:48,452 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:48,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1099178439, now seen corresponding path program 2 times [2024-11-12 07:59:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413373734] [2024-11-12 07:59:48,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413373734] [2024-11-12 07:59:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413373734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118895922] [2024-11-12 07:59:48,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 07:59:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:48,600 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) [2024-11-12 07:59:48,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 07:59:48,690 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 07:59:48,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:48,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 07:59:48,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:48,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:48,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118895922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:48,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-12 07:59:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337197782] [2024-11-12 07:59:48,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:48,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 07:59:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 07:59:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-12 07:59:48,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-12 07:59:48,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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) [2024-11-12 07:59:48,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:48,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-12 07:59:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:49,036 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-11-12 07:59:49,037 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-12 07:59:49,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1196 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2024-11-12 07:59:49,042 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-12 07:59:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2024-11-12 07:59:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 07:59:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 07:59:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-11-12 07:59:49,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-11-12 07:59:49,045 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2024-11-12 07:59:49,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2024-11-12 07:59:49,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 07:59:49,050 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2024-11-12 07:59:49,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-11-12 07:59:49,051 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-11-12 07:59:49,051 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2024-11-12 07:59:49,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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) [2024-11-12 07:59:49,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:49,052 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:49,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 07:59:49,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-12 07:59:49,257 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:49,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -299417337, now seen corresponding path program 3 times [2024-11-12 07:59:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:49,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045439177] [2024-11-12 07:59:49,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045439177] [2024-11-12 07:59:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045439177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514594748] [2024-11-12 07:59:49,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 07:59:49,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:49,496 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) [2024-11-12 07:59:49,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 07:59:49,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-12 07:59:49,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:49,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 07:59:49,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:49,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514594748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:49,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-12 07:59:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352705708] [2024-11-12 07:59:49,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:49,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 07:59:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 07:59:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-12 07:59:49,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-12 07:59:49,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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) [2024-11-12 07:59:49,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:49,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-12 07:59:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:50,276 INFO L124 PetriNetUnfolderBase]: 475/763 cut-off events. [2024-11-12 07:59:50,277 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2024-11-12 07:59:50,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 763 events. 475/763 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1994 event pairs, 20 based on Foata normal form. 108/857 useless extension candidates. Maximal degree in co-relation 2216. Up to 190 conditions per place. [2024-11-12 07:59:50,285 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 146 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2024-11-12 07:59:50,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 179 transitions, 868 flow [2024-11-12 07:59:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-12 07:59:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-12 07:59:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 469 transitions. [2024-11-12 07:59:50,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6738505747126436 [2024-11-12 07:59:50,289 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 469 transitions. [2024-11-12 07:59:50,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 179 transitions, 868 flow [2024-11-12 07:59:50,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 179 transitions, 796 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-11-12 07:59:50,300 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2024-11-12 07:59:50,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2024-11-12 07:59:50,302 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-11-12 07:59:50,302 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2024-11-12 07:59:50,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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) [2024-11-12 07:59:50,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:50,303 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:50,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 07:59:50,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:50,507 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:50,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1108070521, now seen corresponding path program 4 times [2024-11-12 07:59:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:50,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807898110] [2024-11-12 07:59:50,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:51,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:51,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807898110] [2024-11-12 07:59:51,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807898110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:51,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269965020] [2024-11-12 07:59:51,043 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 07:59:51,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:51,045 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) [2024-11-12 07:59:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 07:59:51,171 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 07:59:51,171 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:51,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 07:59:51,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:51,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269965020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:51,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:51,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2024-11-12 07:59:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927732981] [2024-11-12 07:59:51,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:51,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 07:59:51,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 07:59:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-11-12 07:59:51,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-12 07:59:51,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 27 states, 27 states have (on average 13.296296296296296) internal successors, (359), 27 states have internal predecessors, (359), 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) [2024-11-12 07:59:51,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:51,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-12 07:59:51,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:52,022 INFO L124 PetriNetUnfolderBase]: 511/817 cut-off events. [2024-11-12 07:59:52,022 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2024-11-12 07:59:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 817 events. 511/817 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2126 event pairs, 20 based on Foata normal form. 18/821 useless extension candidates. Maximal degree in co-relation 2486. Up to 172 conditions per place. [2024-11-12 07:59:52,036 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 158 selfloop transitions, 25 changer transitions 0/193 dead transitions. [2024-11-12 07:59:52,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 960 flow [2024-11-12 07:59:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-12 07:59:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-12 07:59:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 497 transitions. [2024-11-12 07:59:52,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6591511936339522 [2024-11-12 07:59:52,039 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 26 states and 497 transitions. [2024-11-12 07:59:52,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 960 flow [2024-11-12 07:59:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 193 transitions, 860 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-11-12 07:59:52,059 INFO L231 Difference]: Finished difference. Result has 99 places, 49 transitions, 266 flow [2024-11-12 07:59:52,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=266, PETRI_PLACES=99, PETRI_TRANSITIONS=49} [2024-11-12 07:59:52,060 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-11-12 07:59:52,062 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 49 transitions, 266 flow [2024-11-12 07:59:52,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.296296296296296) internal successors, (359), 27 states have internal predecessors, (359), 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) [2024-11-12 07:59:52,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:52,062 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:52,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 07:59:52,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:52,264 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:52,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -518058169, now seen corresponding path program 5 times [2024-11-12 07:59:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671640645] [2024-11-12 07:59:52,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:54,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:54,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671640645] [2024-11-12 07:59:54,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671640645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:54,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902921158] [2024-11-12 07:59:54,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 07:59:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:54,269 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) [2024-11-12 07:59:54,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 07:59:54,361 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-12 07:59:54,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:54,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-12 07:59:54,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:56,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902921158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:58,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:58,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2024-11-12 07:59:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451546080] [2024-11-12 07:59:58,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:58,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-12 07:59:58,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-12 07:59:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=7014, Unknown=0, NotChecked=0, Total=8190 [2024-11-12 07:59:58,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-12 07:59:58,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 49 transitions, 266 flow. Second operand has 91 states, 91 states have (on average 6.186813186813187) internal successors, (563), 91 states have internal predecessors, (563), 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) [2024-11-12 07:59:58,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:58,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-12 07:59:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:00:48,573 INFO L124 PetriNetUnfolderBase]: 36637/59475 cut-off events. [2024-11-12 08:00:48,573 INFO L125 PetriNetUnfolderBase]: For 188859/188859 co-relation queries the response was YES. [2024-11-12 08:00:49,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159292 conditions, 59475 events. 36637/59475 cut-off events. For 188859/188859 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 404783 event pairs, 70 based on Foata normal form. 0/58937 useless extension candidates. Maximal degree in co-relation 159250. Up to 7719 conditions per place. [2024-11-12 08:00:49,380 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 955 selfloop transitions, 1475 changer transitions 1141/3574 dead transitions. [2024-11-12 08:00:49,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 3574 transitions, 22849 flow [2024-11-12 08:00:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2024-11-12 08:00:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2024-11-12 08:00:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 3845 transitions. [2024-11-12 08:00:49,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4619728463294485 [2024-11-12 08:00:49,401 INFO L175 Difference]: Start difference. First operand has 99 places, 49 transitions, 266 flow. Second operand 287 states and 3845 transitions. [2024-11-12 08:00:49,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 3574 transitions, 22849 flow [2024-11-12 08:00:50,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 3574 transitions, 19739 flow, removed 378 selfloop flow, removed 23 redundant places. [2024-11-12 08:00:50,143 INFO L231 Difference]: Finished difference. Result has 472 places, 1618 transitions, 9792 flow [2024-11-12 08:00:50,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=287, PETRI_FLOW=9792, PETRI_PLACES=472, PETRI_TRANSITIONS=1618} [2024-11-12 08:00:50,144 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2024-11-12 08:00:50,145 INFO L471 AbstractCegarLoop]: Abstraction has has 472 places, 1618 transitions, 9792 flow [2024-11-12 08:00:50,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.186813186813187) internal successors, (563), 91 states have internal predecessors, (563), 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) [2024-11-12 08:00:50,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:00:50,146 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:00:50,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:00:50,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:00:50,351 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:00:50,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:00:50,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1712367833, now seen corresponding path program 1 times [2024-11-12 08:00:50,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:00:50,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2886639] [2024-11-12 08:00:50,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:00:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:00:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:00:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:00:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:00:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2886639] [2024-11-12 08:00:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2886639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:00:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38496337] [2024-11-12 08:00:52,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:00:52,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:00:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:00:52,519 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) [2024-11-12 08:00:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:00:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:00:52,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-12 08:00:52,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:00:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 253 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:00:54,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:00:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:00:56,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38496337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:00:56,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:00:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2024-11-12 08:00:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358344339] [2024-11-12 08:00:56,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:00:56,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-12 08:00:56,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:00:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-12 08:00:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1240, Invalid=8266, Unknown=0, NotChecked=0, Total=9506 [2024-11-12 08:00:56,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-12 08:00:56,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1618 transitions, 9792 flow. Second operand has 98 states, 98 states have (on average 6.224489795918367) internal successors, (610), 98 states have internal predecessors, (610), 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) [2024-11-12 08:00:56,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:00:56,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-12 08:00:56,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand