./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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-ext/31_simple_loop5_vs.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 d5289904c0d34e84fc731c9bca51c5d8bc54117a73409b0419290d8896b60d2d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:07:31,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:07:31,400 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:07:31,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:07:31,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:07:31,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:07:31,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:07:31,428 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:07:31,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:07:31,428 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:07:31,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:07:31,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:07:31,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:07:31,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:07:31,432 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:07:31,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:07:31,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:07:31,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:07:31,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:07:31,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:07:31,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:07:31,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:07:31,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:07:31,438 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:07:31,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:07:31,439 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:07:31,439 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:07:31,439 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:07:31,439 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:07:31,440 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:07:31,440 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:07:31,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:07:31,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:31,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:07:31,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:07:31,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:07:31,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:07:31,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:07:31,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:07:31,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:07:31,444 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:07:31,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:07:31,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5289904c0d34e84fc731c9bca51c5d8bc54117a73409b0419290d8896b60d2d [2024-11-16 19:07:31,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:07:31,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:07:31,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:07:31,698 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:07:31,698 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:07:31,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-11-16 19:07:33,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:07:33,411 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:07:33,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-11-16 19:07:33,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e60f001/a5fe724d25ef4da98304b5e8cc918347/FLAG268c10960 [2024-11-16 19:07:33,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e60f001/a5fe724d25ef4da98304b5e8cc918347 [2024-11-16 19:07:33,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:07:33,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:07:33,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:33,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:07:33,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:07:33,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1df62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33, skipping insertion in model container [2024-11-16 19:07:33,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,499 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:07:33,814 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-ext/31_simple_loop5_vs.i[30640,30653] [2024-11-16 19:07:33,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:33,841 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:07:33,892 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-ext/31_simple_loop5_vs.i[30640,30653] [2024-11-16 19:07:33,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:07:33,929 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:07:33,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33 WrapperNode [2024-11-16 19:07:33,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:07:33,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:33,932 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:07:33,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:07:33,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,968 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2024-11-16 19:07:33,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:07:33,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:07:33,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:07:33,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:07:33,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,995 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]. [2024-11-16 19:07:33,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:33,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,003 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:07:34,015 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:07:34,015 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:07:34,015 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:07:34,016 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (1/1) ... [2024-11-16 19:07:34,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:07:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:07:34,050 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) [2024-11-16 19:07:34,052 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 [2024-11-16 19:07:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-11-16 19:07:34,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-11-16 19:07:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-16 19:07:34,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-16 19:07:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:07:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:07:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:07:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:07:34,099 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:07:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:07:34,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:07:34,101 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:07:34,216 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:07:34,218 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:07:34,350 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:07:34,351 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:07:34,506 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:07:34,506 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:07:34,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:34 BoogieIcfgContainer [2024-11-16 19:07:34,507 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:07:34,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:07:34,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:07:34,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:07:34,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:07:33" (1/3) ... [2024-11-16 19:07:34,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70421f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:34, skipping insertion in model container [2024-11-16 19:07:34,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:07:33" (2/3) ... [2024-11-16 19:07:34,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70421f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:07:34, skipping insertion in model container [2024-11-16 19:07:34,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:07:34" (3/3) ... [2024-11-16 19:07:34,517 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2024-11-16 19:07:34,533 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:07:34,534 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:07:34,534 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:07:34,573 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 74 flow [2024-11-16 19:07:34,635 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2024-11-16 19:07:34,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 37 events. 6/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 82 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2024-11-16 19:07:34,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 74 flow [2024-11-16 19:07:34,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 32 transitions, 71 flow [2024-11-16 19:07:34,651 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:34,660 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:34,660 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:07:34,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:34,675 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-16 19:07:34,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:34,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:34,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:34,681 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:07:34,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash 441951871, now seen corresponding path program 1 times [2024-11-16 19:07:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:34,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863815082] [2024-11-16 19:07:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:35,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863815082] [2024-11-16 19:07:35,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863815082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:35,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691144349] [2024-11-16 19:07:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:35,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:35,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 33 [2024-11-16 19:07:35,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-11-16 19:07:35,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:35,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 33 [2024-11-16 19:07:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:35,187 INFO L124 PetriNetUnfolderBase]: 83/200 cut-off events. [2024-11-16 19:07:35,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:35,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 200 events. 83/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 890 event pairs, 28 based on Foata normal form. 94/286 useless extension candidates. Maximal degree in co-relation 348. Up to 97 conditions per place. [2024-11-16 19:07:35,194 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 16 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-16 19:07:35,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 103 flow [2024-11-16 19:07:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-16 19:07:35,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696969696969697 [2024-11-16 19:07:35,205 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 71 flow. Second operand 3 states and 69 transitions. [2024-11-16 19:07:35,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 103 flow [2024-11-16 19:07:35,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:35,211 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2024-11-16 19:07:35,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-11-16 19:07:35,219 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-11-16 19:07:35,219 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2024-11-16 19:07:35,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-11-16 19:07:35,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:35,220 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:35,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:07:35,221 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:07:35,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash 546397332, now seen corresponding path program 1 times [2024-11-16 19:07:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568843130] [2024-11-16 19:07:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:35,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:35,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:35,292 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:35,294 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-16 19:07:35,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-16 19:07:35,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-11-16 19:07:35,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:07:35,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:07:35,298 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:07:35,301 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:35,301 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:07:35,326 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 132 flow [2024-11-16 19:07:35,341 INFO L124 PetriNetUnfolderBase]: 8/51 cut-off events. [2024-11-16 19:07:35,341 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:07:35,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 51 events. 8/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 111 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 58. Up to 6 conditions per place. [2024-11-16 19:07:35,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 132 flow [2024-11-16 19:07:35,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 93 flow [2024-11-16 19:07:35,345 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:35,347 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:35,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:07:35,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:35,353 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-16 19:07:35,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:35,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:35,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:35,354 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:07:35,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 957392183, now seen corresponding path program 1 times [2024-11-16 19:07:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482186501] [2024-11-16 19:07:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482186501] [2024-11-16 19:07:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482186501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:35,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:35,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:35,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389408510] [2024-11-16 19:07:35,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:35,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:35,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:35,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-16 19:07:35,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-16 19:07:35,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:35,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-16 19:07:35,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:35,640 INFO L124 PetriNetUnfolderBase]: 620/1139 cut-off events. [2024-11-16 19:07:35,640 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-16 19:07:35,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1139 events. 620/1139 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6665 event pairs, 139 based on Foata normal form. 531/1634 useless extension candidates. Maximal degree in co-relation 2094. Up to 760 conditions per place. [2024-11-16 19:07:35,659 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 22 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-11-16 19:07:35,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 148 flow [2024-11-16 19:07:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-16 19:07:35,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-16 19:07:35,665 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 93 flow. Second operand 3 states and 108 transitions. [2024-11-16 19:07:35,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 148 flow [2024-11-16 19:07:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:35,668 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 93 flow [2024-11-16 19:07:35,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-11-16 19:07:35,670 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-16 19:07:35,671 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 93 flow [2024-11-16 19:07:35,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-16 19:07:35,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:35,671 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:35,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:07:35,672 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:07:35,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:35,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1012461249, now seen corresponding path program 1 times [2024-11-16 19:07:35,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:35,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114687888] [2024-11-16 19:07:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:35,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:35,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:35,712 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:35,712 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-16 19:07:35,712 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-16 19:07:35,712 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-11-16 19:07:35,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-16 19:07:35,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-16 19:07:35,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:07:35,713 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:07:35,714 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:35,714 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:07:35,741 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:35,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 194 flow [2024-11-16 19:07:35,752 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-11-16 19:07:35,753 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:07:35,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 65 events. 10/65 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 76. Up to 8 conditions per place. [2024-11-16 19:07:35,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 194 flow [2024-11-16 19:07:35,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 48 transitions, 117 flow [2024-11-16 19:07:35,757 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:35,759 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:35,759 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:07:35,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:35,762 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-16 19:07:35,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:35,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:35,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:35,766 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:07:35,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash -350132808, now seen corresponding path program 1 times [2024-11-16 19:07:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399787975] [2024-11-16 19:07:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:35,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399787975] [2024-11-16 19:07:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399787975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245989830] [2024-11-16 19:07:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:35,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:35,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2024-11-16 19:07:35,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) [2024-11-16 19:07:35,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:35,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2024-11-16 19:07:35,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:36,546 INFO L124 PetriNetUnfolderBase]: 3515/5630 cut-off events. [2024-11-16 19:07:36,547 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2024-11-16 19:07:36,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10608 conditions, 5630 events. 3515/5630 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 36614 event pairs, 724 based on Foata normal form. 2655/8111 useless extension candidates. Maximal degree in co-relation 10596. Up to 4267 conditions per place. [2024-11-16 19:07:36,592 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 28 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-16 19:07:36,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 197 flow [2024-11-16 19:07:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-11-16 19:07:36,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2024-11-16 19:07:36,598 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 117 flow. Second operand 3 states and 147 transitions. [2024-11-16 19:07:36,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 197 flow [2024-11-16 19:07:36,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 192 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:36,603 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 120 flow [2024-11-16 19:07:36,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-16 19:07:36,604 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-11-16 19:07:36,605 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 120 flow [2024-11-16 19:07:36,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) [2024-11-16 19:07:36,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:36,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:36,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:07:36,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:07:36,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1693316674, now seen corresponding path program 1 times [2024-11-16 19:07:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:36,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231608638] [2024-11-16 19:07:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:36,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231608638] [2024-11-16 19:07:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231608638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:36,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:36,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517041508] [2024-11-16 19:07:36,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:36,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:36,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2024-11-16 19:07:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-16 19:07:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:36,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2024-11-16 19:07:36,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:36,880 INFO L124 PetriNetUnfolderBase]: 456/1077 cut-off events. [2024-11-16 19:07:36,880 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-11-16 19:07:36,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 1077 events. 456/1077 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6547 event pairs, 102 based on Foata normal form. 618/1673 useless extension candidates. Maximal degree in co-relation 2286. Up to 633 conditions per place. [2024-11-16 19:07:36,890 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 21 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-11-16 19:07:36,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 203 flow [2024-11-16 19:07:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-16 19:07:36,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5443037974683544 [2024-11-16 19:07:36,892 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 120 flow. Second operand 3 states and 129 transitions. [2024-11-16 19:07:36,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 203 flow [2024-11-16 19:07:36,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:36,895 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 132 flow [2024-11-16 19:07:36,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-16 19:07:36,897 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2024-11-16 19:07:36,898 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 132 flow [2024-11-16 19:07:36,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-16 19:07:36,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:36,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:36,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:07:36,899 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:07:36,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1683450812, now seen corresponding path program 1 times [2024-11-16 19:07:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:36,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542757426] [2024-11-16 19:07:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:36,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542757426] [2024-11-16 19:07:36,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542757426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:36,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:36,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:37,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029569333] [2024-11-16 19:07:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:37,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:07:37,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:07:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:07:37,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2024-11-16 19:07:37,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-16 19:07:37,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:37,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2024-11-16 19:07:37,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:37,222 INFO L124 PetriNetUnfolderBase]: 691/1681 cut-off events. [2024-11-16 19:07:37,222 INFO L125 PetriNetUnfolderBase]: For 522/546 co-relation queries the response was YES. [2024-11-16 19:07:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3996 conditions, 1681 events. 691/1681 cut-off events. For 522/546 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11944 event pairs, 52 based on Foata normal form. 24/1696 useless extension candidates. Maximal degree in co-relation 3982. Up to 816 conditions per place. [2024-11-16 19:07:37,240 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 40 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-16 19:07:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 326 flow [2024-11-16 19:07:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:07:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:07:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-16 19:07:37,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2024-11-16 19:07:37,242 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 132 flow. Second operand 4 states and 180 transitions. [2024-11-16 19:07:37,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 326 flow [2024-11-16 19:07:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:37,247 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 164 flow [2024-11-16 19:07:37,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-16 19:07:37,248 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-11-16 19:07:37,249 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 164 flow [2024-11-16 19:07:37,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-16 19:07:37,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:37,249 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:37,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:07:37,249 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:07:37,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash -424522629, now seen corresponding path program 1 times [2024-11-16 19:07:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665571157] [2024-11-16 19:07:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:37,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:37,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:37,288 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:37,289 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-16 19:07:37,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-16 19:07:37,290 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-16 19:07:37,290 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-16 19:07:37,290 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-16 19:07:37,290 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-16 19:07:37,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:07:37,293 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:07:37,293 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:37,294 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:07:37,330 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:37,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 260 flow [2024-11-16 19:07:37,341 INFO L124 PetriNetUnfolderBase]: 12/79 cut-off events. [2024-11-16 19:07:37,341 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:07:37,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 79 events. 12/79 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 167 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 95. Up to 10 conditions per place. [2024-11-16 19:07:37,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 102 transitions, 260 flow [2024-11-16 19:07:37,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 143 flow [2024-11-16 19:07:37,344 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:37,345 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:37,345 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-16 19:07:37,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:37,348 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-16 19:07:37,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:07:37,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:37,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:37,349 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:07:37,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 722980254, now seen corresponding path program 1 times [2024-11-16 19:07:37,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:37,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574795106] [2024-11-16 19:07:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:37,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:37,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574795106] [2024-11-16 19:07:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574795106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:37,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022673650] [2024-11-16 19:07:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:37,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:37,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 102 [2024-11-16 19:07:37,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:07:37,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:37,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 102 [2024-11-16 19:07:37,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:40,026 INFO L124 PetriNetUnfolderBase]: 17930/26345 cut-off events. [2024-11-16 19:07:40,026 INFO L125 PetriNetUnfolderBase]: For 3390/3390 co-relation queries the response was YES. [2024-11-16 19:07:40,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50323 conditions, 26345 events. 17930/26345 cut-off events. For 3390/3390 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 182079 event pairs, 3961 based on Foata normal form. 12511/38038 useless extension candidates. Maximal degree in co-relation 50310. Up to 21382 conditions per place. [2024-11-16 19:07:40,282 INFO L140 encePairwiseOnDemand]: 87/102 looper letters, 34 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-11-16 19:07:40,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 250 flow [2024-11-16 19:07:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2024-11-16 19:07:40,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-11-16 19:07:40,285 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 143 flow. Second operand 3 states and 186 transitions. [2024-11-16 19:07:40,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 250 flow [2024-11-16 19:07:40,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 237 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:40,292 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 147 flow [2024-11-16 19:07:40,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-16 19:07:40,292 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-11-16 19:07:40,293 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 147 flow [2024-11-16 19:07:40,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:07:40,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:40,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:40,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:07:40,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:07:40,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1561273986, now seen corresponding path program 1 times [2024-11-16 19:07:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:40,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835573711] [2024-11-16 19:07:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835573711] [2024-11-16 19:07:40,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835573711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:40,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:40,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761596579] [2024-11-16 19:07:40,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:40,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:40,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 102 [2024-11-16 19:07:40,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-16 19:07:40,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:40,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 102 [2024-11-16 19:07:40,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:40,693 INFO L124 PetriNetUnfolderBase]: 1187/2630 cut-off events. [2024-11-16 19:07:40,694 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-11-16 19:07:40,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 2630 events. 1187/2630 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18508 event pairs, 260 based on Foata normal form. 2076/4667 useless extension candidates. Maximal degree in co-relation 5693. Up to 1627 conditions per place. [2024-11-16 19:07:40,717 INFO L140 encePairwiseOnDemand]: 92/102 looper letters, 25 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-11-16 19:07:40,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 249 flow [2024-11-16 19:07:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-16 19:07:40,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-11-16 19:07:40,719 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 147 flow. Second operand 3 states and 165 transitions. [2024-11-16 19:07:40,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 249 flow [2024-11-16 19:07:40,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:40,722 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 162 flow [2024-11-16 19:07:40,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-16 19:07:40,723 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2024-11-16 19:07:40,723 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 162 flow [2024-11-16 19:07:40,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-16 19:07:40,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:40,724 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:40,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:07:40,724 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:07:40,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -536272648, now seen corresponding path program 1 times [2024-11-16 19:07:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722638198] [2024-11-16 19:07:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:40,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722638198] [2024-11-16 19:07:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722638198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:40,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:40,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38175557] [2024-11-16 19:07:40,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:40,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:07:40,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:07:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:07:40,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 102 [2024-11-16 19:07:40,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 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) [2024-11-16 19:07:40,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:40,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 102 [2024-11-16 19:07:40,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:41,192 INFO L124 PetriNetUnfolderBase]: 1731/3892 cut-off events. [2024-11-16 19:07:41,193 INFO L125 PetriNetUnfolderBase]: For 1183/1231 co-relation queries the response was YES. [2024-11-16 19:07:41,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9528 conditions, 3892 events. 1731/3892 cut-off events. For 1183/1231 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30580 event pairs, 86 based on Foata normal form. 42/3924 useless extension candidates. Maximal degree in co-relation 9513. Up to 2243 conditions per place. [2024-11-16 19:07:41,226 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 49 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-11-16 19:07:41,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 408 flow [2024-11-16 19:07:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:07:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:07:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-16 19:07:41,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2024-11-16 19:07:41,229 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 162 flow. Second operand 4 states and 231 transitions. [2024-11-16 19:07:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 408 flow [2024-11-16 19:07:41,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:41,235 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 204 flow [2024-11-16 19:07:41,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-16 19:07:41,238 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-16 19:07:41,238 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 204 flow [2024-11-16 19:07:41,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 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) [2024-11-16 19:07:41,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:41,239 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:41,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-16 19:07:41,239 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:07:41,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1510984318, now seen corresponding path program 1 times [2024-11-16 19:07:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956527636] [2024-11-16 19:07:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:41,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:41,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:41,271 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:41,271 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-16 19:07:41,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-16 19:07:41,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-11-16 19:07:41,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-16 19:07:41,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-16 19:07:41,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-16 19:07:41,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-16 19:07:41,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-16 19:07:41,274 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:07:41,274 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:41,274 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-16 19:07:41,337 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:41,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 125 transitions, 330 flow [2024-11-16 19:07:41,346 INFO L124 PetriNetUnfolderBase]: 14/93 cut-off events. [2024-11-16 19:07:41,346 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-16 19:07:41,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 93 events. 14/93 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 115. Up to 12 conditions per place. [2024-11-16 19:07:41,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 125 transitions, 330 flow [2024-11-16 19:07:41,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 64 transitions, 171 flow [2024-11-16 19:07:41,348 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:41,348 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:41,348 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-16 19:07:41,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:41,351 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-16 19:07:41,351 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:07:41,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:41,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:41,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:07:41,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash 18809983, now seen corresponding path program 1 times [2024-11-16 19:07:41,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:41,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341863071] [2024-11-16 19:07:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:41,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:41,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341863071] [2024-11-16 19:07:41,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341863071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:41,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:41,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:41,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011054548] [2024-11-16 19:07:41,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:41,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:41,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 125 [2024-11-16 19:07:41,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2024-11-16 19:07:41,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:41,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 125 [2024-11-16 19:07:41,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:50,230 INFO L124 PetriNetUnfolderBase]: 87029/120392 cut-off events. [2024-11-16 19:07:50,230 INFO L125 PetriNetUnfolderBase]: For 19842/19842 co-relation queries the response was YES. [2024-11-16 19:07:50,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232442 conditions, 120392 events. 87029/120392 cut-off events. For 19842/19842 co-relation queries the response was YES. Maximal size of possible extension queue 4335. Compared 869056 event pairs, 21478 based on Foata normal form. 57475/174238 useless extension candidates. Maximal degree in co-relation 232428. Up to 101893 conditions per place. [2024-11-16 19:07:51,552 INFO L140 encePairwiseOnDemand]: 108/125 looper letters, 40 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-16 19:07:51,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 307 flow [2024-11-16 19:07:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-16 19:07:51,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-16 19:07:51,556 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 171 flow. Second operand 3 states and 225 transitions. [2024-11-16 19:07:51,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 307 flow [2024-11-16 19:07:51,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 282 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:51,572 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 174 flow [2024-11-16 19:07:51,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-11-16 19:07:51,573 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2024-11-16 19:07:51,573 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 174 flow [2024-11-16 19:07:51,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2024-11-16 19:07:51,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:51,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:51,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-16 19:07:51,575 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:07:51,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1001541489, now seen corresponding path program 1 times [2024-11-16 19:07:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:51,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929018923] [2024-11-16 19:07:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:51,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:51,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929018923] [2024-11-16 19:07:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929018923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:51,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474259946] [2024-11-16 19:07:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:51,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:51,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 125 [2024-11-16 19:07:51,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2024-11-16 19:07:51,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:51,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 125 [2024-11-16 19:07:51,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:52,041 INFO L124 PetriNetUnfolderBase]: 2900/6163 cut-off events. [2024-11-16 19:07:52,041 INFO L125 PetriNetUnfolderBase]: For 1688/1688 co-relation queries the response was YES. [2024-11-16 19:07:52,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13526 conditions, 6163 events. 2900/6163 cut-off events. For 1688/1688 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 49162 event pairs, 648 based on Foata normal form. 6162/12252 useless extension candidates. Maximal degree in co-relation 13510. Up to 3945 conditions per place. [2024-11-16 19:07:52,094 INFO L140 encePairwiseOnDemand]: 113/125 looper letters, 29 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2024-11-16 19:07:52,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 295 flow [2024-11-16 19:07:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:07:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:07:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2024-11-16 19:07:52,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.536 [2024-11-16 19:07:52,096 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 174 flow. Second operand 3 states and 201 transitions. [2024-11-16 19:07:52,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 295 flow [2024-11-16 19:07:52,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:52,100 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 192 flow [2024-11-16 19:07:52,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-11-16 19:07:52,101 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2024-11-16 19:07:52,101 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 192 flow [2024-11-16 19:07:52,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2024-11-16 19:07:52,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:52,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:52,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 19:07:52,102 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:07:52,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2005692749, now seen corresponding path program 1 times [2024-11-16 19:07:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:52,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968126373] [2024-11-16 19:07:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:52,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968126373] [2024-11-16 19:07:52,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968126373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:52,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:52,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:07:52,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307429052] [2024-11-16 19:07:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:52,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:07:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:07:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:07:52,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 125 [2024-11-16 19:07:52,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2024-11-16 19:07:52,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:52,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 125 [2024-11-16 19:07:52,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:52,875 INFO L124 PetriNetUnfolderBase]: 4045/8580 cut-off events. [2024-11-16 19:07:52,876 INFO L125 PetriNetUnfolderBase]: For 2482/2562 co-relation queries the response was YES. [2024-11-16 19:07:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21475 conditions, 8580 events. 4045/8580 cut-off events. For 2482/2562 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 72865 event pairs, 162 based on Foata normal form. 65/8633 useless extension candidates. Maximal degree in co-relation 21459. Up to 5638 conditions per place. [2024-11-16 19:07:52,954 INFO L140 encePairwiseOnDemand]: 118/125 looper letters, 58 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2024-11-16 19:07:52,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 490 flow [2024-11-16 19:07:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:07:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:07:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-16 19:07:52,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.564 [2024-11-16 19:07:52,957 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 192 flow. Second operand 4 states and 282 transitions. [2024-11-16 19:07:52,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 490 flow [2024-11-16 19:07:52,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:07:52,968 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 244 flow [2024-11-16 19:07:52,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-11-16 19:07:52,969 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-11-16 19:07:52,969 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 244 flow [2024-11-16 19:07:52,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2024-11-16 19:07:52,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:52,970 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:52,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-16 19:07:52,970 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:07:52,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:52,971 INFO L85 PathProgramCache]: Analyzing trace with hash 248003253, now seen corresponding path program 1 times [2024-11-16 19:07:52,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:52,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975273268] [2024-11-16 19:07:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:53,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:53,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975273268] [2024-11-16 19:07:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975273268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:07:53,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092334253] [2024-11-16 19:07:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:53,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:07:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:07:53,041 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) [2024-11-16 19:07:53,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:07:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:53,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:07:53,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:07:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:53,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:07:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:53,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092334253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:07:53,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:07:53,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-16 19:07:53,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010211302] [2024-11-16 19:07:53,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:07:53,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:07:53,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:07:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:07:53,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 125 [2024-11-16 19:07:53,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 244 flow. Second operand has 11 states, 11 states have (on average 51.54545454545455) internal successors, (567), 11 states have internal predecessors, (567), 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) [2024-11-16 19:07:53,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:53,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 125 [2024-11-16 19:07:53,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:07:55,621 INFO L124 PetriNetUnfolderBase]: 10819/21563 cut-off events. [2024-11-16 19:07:55,621 INFO L125 PetriNetUnfolderBase]: For 9985/10315 co-relation queries the response was YES. [2024-11-16 19:07:55,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51831 conditions, 21563 events. 10819/21563 cut-off events. For 9985/10315 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 198547 event pairs, 2132 based on Foata normal form. 535/22039 useless extension candidates. Maximal degree in co-relation 51812. Up to 6686 conditions per place. [2024-11-16 19:07:55,756 INFO L140 encePairwiseOnDemand]: 118/125 looper letters, 60 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-11-16 19:07:55,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 108 transitions, 608 flow [2024-11-16 19:07:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:07:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:07:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-16 19:07:55,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104 [2024-11-16 19:07:55,758 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 244 flow. Second operand 5 states and 319 transitions. [2024-11-16 19:07:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 108 transitions, 608 flow [2024-11-16 19:07:55,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 108 transitions, 586 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-16 19:07:55,771 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 326 flow [2024-11-16 19:07:55,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-11-16 19:07:55,772 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-11-16 19:07:55,772 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 326 flow [2024-11-16 19:07:55,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.54545454545455) internal successors, (567), 11 states have internal predecessors, (567), 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) [2024-11-16 19:07:55,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:55,773 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:55,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:07:55,977 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,SelfDestructingSolverStorable15 [2024-11-16 19:07:55,978 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:07:55,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash -14259818, now seen corresponding path program 1 times [2024-11-16 19:07:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303341881] [2024-11-16 19:07:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:55,994 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:07:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:07:56,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:07:56,022 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:07:56,023 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-16 19:07:56,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-11-16 19:07:56,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-11-16 19:07:56,024 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-16 19:07:56,024 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-16 19:07:56,025 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-16 19:07:56,025 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-16 19:07:56,025 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-16 19:07:56,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-16 19:07:56,025 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-16 19:07:56,026 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:07:56,026 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-16 19:07:56,064 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:07:56,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 148 transitions, 404 flow [2024-11-16 19:07:56,076 INFO L124 PetriNetUnfolderBase]: 16/107 cut-off events. [2024-11-16 19:07:56,076 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-16 19:07:56,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 107 events. 16/107 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 136. Up to 14 conditions per place. [2024-11-16 19:07:56,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 148 transitions, 404 flow [2024-11-16 19:07:56,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 201 flow [2024-11-16 19:07:56,080 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:07:56,080 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;@6c729961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:07:56,080 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-16 19:07:56,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:07:56,083 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-16 19:07:56,083 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:07:56,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:07:56,083 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:07:56,083 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:07:56,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:07:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1695277765, now seen corresponding path program 1 times [2024-11-16 19:07:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:07:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139918310] [2024-11-16 19:07:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:07:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:07:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:07:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:07:56,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:07:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139918310] [2024-11-16 19:07:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139918310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:07:56,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:07:56,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:07:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084955682] [2024-11-16 19:07:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:07:56,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:07:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:07:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:07:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:07:56,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2024-11-16 19:07:56,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2024-11-16 19:07:56,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:07:56,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2024-11-16 19:07:56,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand