./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -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 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:43:43,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:43:43,380 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:43:43,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:43:43,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:43:43,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:43:43,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:43:43,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:43:43,421 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:43:43,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:43:43,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:43:43,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:43:43,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:43:43,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:43:43,426 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:43:43,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:43:43,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:43:43,427 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:43:43,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:43:43,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:43:43,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:43:43,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:43:43,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:43:43,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:43:43,431 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:43:43,431 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:43:43,431 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:43:43,432 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:43:43,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:43:43,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:43:43,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:43:43,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:43:43,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:43:43,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:43:43,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:43:43,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:43:43,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:43:43,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:43:43,434 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:43:43,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:43:43,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:43:43,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:43:43,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 [2024-10-14 14:43:43,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:43:43,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:43:43,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:43:43,710 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:43:43,711 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:43:43,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2024-10-14 14:43:45,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:43:45,412 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:43:45,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2024-10-14 14:43:45,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b419dd29/59bb7ea4fe9c42c5a295682b270e305c/FLAG0c4386e72 [2024-10-14 14:43:45,432 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b419dd29/59bb7ea4fe9c42c5a295682b270e305c [2024-10-14 14:43:45,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:43:45,436 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:43:45,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:43:45,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:43:45,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:43:45,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d366a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45, skipping insertion in model container [2024-10-14 14:43:45,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,480 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:43:45,685 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2996,3009] [2024-10-14 14:43:45,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:43:45,705 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:43:45,732 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2996,3009] [2024-10-14 14:43:45,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:43:45,757 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:43:45,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45 WrapperNode [2024-10-14 14:43:45,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:43:45,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:43:45,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:43:45,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:43:45,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,793 INFO L138 Inliner]: procedures = 21, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-10-14 14:43:45,794 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:43:45,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:43:45,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:43:45,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:43:45,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,821 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 14:43:45,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:43:45,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:43:45,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:43:45,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:43:45,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (1/1) ... [2024-10-14 14:43:45,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:43:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:45,880 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) [2024-10-14 14:43:45,882 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 [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:43:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:43:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 14:43:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:43:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:43:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:43:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:43:45,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:43:45,920 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:43:46,003 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:43:46,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:43:46,182 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:43:46,182 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:43:46,345 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:43:46,345 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:43:46,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:43:46 BoogieIcfgContainer [2024-10-14 14:43:46,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:43:46,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:43:46,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:43:46,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:43:46,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:43:45" (1/3) ... [2024-10-14 14:43:46,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6012ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:43:46, skipping insertion in model container [2024-10-14 14:43:46,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:45" (2/3) ... [2024-10-14 14:43:46,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6012ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:43:46, skipping insertion in model container [2024-10-14 14:43:46,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:43:46" (3/3) ... [2024-10-14 14:43:46,354 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2024-10-14 14:43:46,367 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:43:46,368 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:43:46,368 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:43:46,418 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 14:43:46,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 91 flow [2024-10-14 14:43:46,489 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-10-14 14:43:46,489 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:43:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 3/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-14 14:43:46,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 91 flow [2024-10-14 14:43:46,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 80 flow [2024-10-14 14:43:46,507 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:43:46,516 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;@499081f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:43:46,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:43:46,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:43:46,536 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-10-14 14:43:46,536 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:43:46,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:46,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:46,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:46,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1029020577, now seen corresponding path program 1 times [2024-10-14 14:43:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652765931] [2024-10-14 14:43:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652765931] [2024-10-14 14:43:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652765931] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:47,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:43:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12863167] [2024-10-14 14:43:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:47,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:47,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:43:47,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-10-14 14:43:47,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-14 14:43:47,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:47,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-10-14 14:43:47,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:47,785 INFO L124 PetriNetUnfolderBase]: 367/655 cut-off events. [2024-10-14 14:43:47,786 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-14 14:43:47,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 655 events. 367/655 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3347 event pairs, 26 based on Foata normal form. 20/660 useless extension candidates. Maximal degree in co-relation 1074. Up to 445 conditions per place. [2024-10-14 14:43:47,797 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 33 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-10-14 14:43:47,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 204 flow [2024-10-14 14:43:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:43:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:43:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-10-14 14:43:47,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-10-14 14:43:47,810 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 80 flow. Second operand 4 states and 95 transitions. [2024-10-14 14:43:47,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 204 flow [2024-10-14 14:43:47,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 14:43:47,815 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 100 flow [2024-10-14 14:43:47,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-10-14 14:43:47,820 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-10-14 14:43:47,820 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 100 flow [2024-10-14 14:43:47,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-14 14:43:47,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:47,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:47,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:43:47,822 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:47,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash 631285081, now seen corresponding path program 1 times [2024-10-14 14:43:47,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:47,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957653173] [2024-10-14 14:43:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:47,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957653173] [2024-10-14 14:43:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957653173] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971380673] [2024-10-14 14:43:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:48,413 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) [2024-10-14 14:43:48,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:43:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:48,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:43:48,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:48,848 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:43:48,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971380673] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:48,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:43:48,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2024-10-14 14:43:48,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710659525] [2024-10-14 14:43:48,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:48,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:43:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:43:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:43:48,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-10-14 14:43:48,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-10-14 14:43:48,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:48,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-10-14 14:43:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:49,210 INFO L124 PetriNetUnfolderBase]: 1042/1669 cut-off events. [2024-10-14 14:43:49,210 INFO L125 PetriNetUnfolderBase]: For 412/448 co-relation queries the response was YES. [2024-10-14 14:43:49,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3716 conditions, 1669 events. 1042/1669 cut-off events. For 412/448 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8714 event pairs, 288 based on Foata normal form. 24/1665 useless extension candidates. Maximal degree in co-relation 2474. Up to 925 conditions per place. [2024-10-14 14:43:49,224 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 59 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-10-14 14:43:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 87 transitions, 422 flow [2024-10-14 14:43:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:43:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:43:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-10-14 14:43:49,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6971428571428572 [2024-10-14 14:43:49,226 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 100 flow. Second operand 5 states and 122 transitions. [2024-10-14 14:43:49,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 87 transitions, 422 flow [2024-10-14 14:43:49,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 87 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:49,229 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 256 flow [2024-10-14 14:43:49,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2024-10-14 14:43:49,230 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-10-14 14:43:49,231 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 256 flow [2024-10-14 14:43:49,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-10-14 14:43:49,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:49,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:49,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:43:49,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:49,436 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:49,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1270762887, now seen corresponding path program 2 times [2024-10-14 14:43:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:49,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654184661] [2024-10-14 14:43:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:49,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:49,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654184661] [2024-10-14 14:43:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654184661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:43:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458190873] [2024-10-14 14:43:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:49,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:43:49,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-10-14 14:43:49,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-10-14 14:43:49,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:49,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-10-14 14:43:49,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:49,910 INFO L124 PetriNetUnfolderBase]: 882/1459 cut-off events. [2024-10-14 14:43:49,910 INFO L125 PetriNetUnfolderBase]: For 1530/1609 co-relation queries the response was YES. [2024-10-14 14:43:49,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1459 events. 882/1459 cut-off events. For 1530/1609 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7916 event pairs, 115 based on Foata normal form. 106/1463 useless extension candidates. Maximal degree in co-relation 2996. Up to 750 conditions per place. [2024-10-14 14:43:49,923 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 62 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-10-14 14:43:49,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 83 transitions, 541 flow [2024-10-14 14:43:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:43:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:43:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-10-14 14:43:49,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-10-14 14:43:49,927 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 256 flow. Second operand 4 states and 93 transitions. [2024-10-14 14:43:49,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 83 transitions, 541 flow [2024-10-14 14:43:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 83 transitions, 541 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:49,933 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 302 flow [2024-10-14 14:43:49,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2024-10-14 14:43:49,935 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-10-14 14:43:49,935 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 302 flow [2024-10-14 14:43:49,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-10-14 14:43:49,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:49,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:49,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:43:49,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:49,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash -717394264, now seen corresponding path program 1 times [2024-10-14 14:43:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310879541] [2024-10-14 14:43:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310879541] [2024-10-14 14:43:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310879541] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:43:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036776281] [2024-10-14 14:43:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:50,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:43:50,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-10-14 14:43:50,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-10-14 14:43:50,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:50,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-10-14 14:43:50,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:50,481 INFO L124 PetriNetUnfolderBase]: 991/1645 cut-off events. [2024-10-14 14:43:50,481 INFO L125 PetriNetUnfolderBase]: For 1650/1800 co-relation queries the response was YES. [2024-10-14 14:43:50,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 1645 events. 991/1645 cut-off events. For 1650/1800 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8849 event pairs, 156 based on Foata normal form. 144/1753 useless extension candidates. Maximal degree in co-relation 4128. Up to 1126 conditions per place. [2024-10-14 14:43:50,496 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 66 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-10-14 14:43:50,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 608 flow [2024-10-14 14:43:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:43:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:43:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-10-14 14:43:50,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-10-14 14:43:50,502 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 302 flow. Second operand 5 states and 120 transitions. [2024-10-14 14:43:50,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 608 flow [2024-10-14 14:43:50,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 91 transitions, 600 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:43:50,509 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 412 flow [2024-10-14 14:43:50,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2024-10-14 14:43:50,510 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-10-14 14:43:50,511 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 412 flow [2024-10-14 14:43:50,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-10-14 14:43:50,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:50,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:50,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:43:50,512 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:50,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1303098900, now seen corresponding path program 2 times [2024-10-14 14:43:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:50,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081972046] [2024-10-14 14:43:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081972046] [2024-10-14 14:43:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081972046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:50,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:50,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:43:50,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784411624] [2024-10-14 14:43:50,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:50,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:43:50,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:43:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:43:50,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-10-14 14:43:50,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-10-14 14:43:50,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:50,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-10-14 14:43:50,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:51,115 INFO L124 PetriNetUnfolderBase]: 1376/2269 cut-off events. [2024-10-14 14:43:51,116 INFO L125 PetriNetUnfolderBase]: For 3567/3817 co-relation queries the response was YES. [2024-10-14 14:43:51,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 2269 events. 1376/2269 cut-off events. For 3567/3817 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13463 event pairs, 252 based on Foata normal form. 242/2466 useless extension candidates. Maximal degree in co-relation 4550. Up to 1340 conditions per place. [2024-10-14 14:43:51,137 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 68 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-10-14 14:43:51,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 769 flow [2024-10-14 14:43:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:43:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:43:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-10-14 14:43:51,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6742857142857143 [2024-10-14 14:43:51,140 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 412 flow. Second operand 5 states and 118 transitions. [2024-10-14 14:43:51,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 769 flow [2024-10-14 14:43:51,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 101 transitions, 758 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-14 14:43:51,156 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 469 flow [2024-10-14 14:43:51,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2024-10-14 14:43:51,158 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-10-14 14:43:51,158 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 469 flow [2024-10-14 14:43:51,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-10-14 14:43:51,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:51,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:51,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:43:51,159 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:51,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1954223470, now seen corresponding path program 3 times [2024-10-14 14:43:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:51,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123906151] [2024-10-14 14:43:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:51,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123906151] [2024-10-14 14:43:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123906151] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:51,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:51,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:43:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043241822] [2024-10-14 14:43:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:51,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:43:51,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:43:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:43:51,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-10-14 14:43:51,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 469 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-10-14 14:43:51,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:51,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-10-14 14:43:51,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:51,720 INFO L124 PetriNetUnfolderBase]: 1629/2634 cut-off events. [2024-10-14 14:43:51,720 INFO L125 PetriNetUnfolderBase]: For 4694/5076 co-relation queries the response was YES. [2024-10-14 14:43:51,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9282 conditions, 2634 events. 1629/2634 cut-off events. For 4694/5076 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15412 event pairs, 174 based on Foata normal form. 225/2780 useless extension candidates. Maximal degree in co-relation 4753. Up to 1485 conditions per place. [2024-10-14 14:43:51,744 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 83 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-10-14 14:43:51,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 113 transitions, 891 flow [2024-10-14 14:43:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:43:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:43:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-10-14 14:43:51,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-10-14 14:43:51,746 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 469 flow. Second operand 5 states and 126 transitions. [2024-10-14 14:43:51,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 113 transitions, 891 flow [2024-10-14 14:43:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 859 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 14:43:51,756 INFO L231 Difference]: Finished difference. Result has 61 places, 75 transitions, 552 flow [2024-10-14 14:43:51,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=61, PETRI_TRANSITIONS=75} [2024-10-14 14:43:51,757 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-10-14 14:43:51,757 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 75 transitions, 552 flow [2024-10-14 14:43:51,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2024-10-14 14:43:51,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:51,758 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:51,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:43:51,758 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:51,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2054220922, now seen corresponding path program 1 times [2024-10-14 14:43:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612611314] [2024-10-14 14:43:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612611314] [2024-10-14 14:43:51,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612611314] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:51,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629069087] [2024-10-14 14:43:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:51,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:51,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:43:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:52,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 14:43:52,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:52,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629069087] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:52,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:43:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 18 [2024-10-14 14:43:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661114176] [2024-10-14 14:43:52,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:52,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:43:52,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:43:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:43:52,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2024-10-14 14:43:52,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 75 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-14 14:43:52,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:52,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2024-10-14 14:43:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:53,794 INFO L124 PetriNetUnfolderBase]: 6100/9215 cut-off events. [2024-10-14 14:43:53,794 INFO L125 PetriNetUnfolderBase]: For 20887/21688 co-relation queries the response was YES. [2024-10-14 14:43:53,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33774 conditions, 9215 events. 6100/9215 cut-off events. For 20887/21688 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 57201 event pairs, 499 based on Foata normal form. 322/9486 useless extension candidates. Maximal degree in co-relation 18817. Up to 3086 conditions per place. [2024-10-14 14:43:53,873 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 147 selfloop transitions, 80 changer transitions 0/234 dead transitions. [2024-10-14 14:43:53,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2099 flow [2024-10-14 14:43:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:43:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:43:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-10-14 14:43:53,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6028571428571429 [2024-10-14 14:43:53,876 INFO L175 Difference]: Start difference. First operand has 61 places, 75 transitions, 552 flow. Second operand 10 states and 211 transitions. [2024-10-14 14:43:53,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2099 flow [2024-10-14 14:43:53,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2084 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:43:53,908 INFO L231 Difference]: Finished difference. Result has 78 places, 149 transitions, 1539 flow [2024-10-14 14:43:53,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1539, PETRI_PLACES=78, PETRI_TRANSITIONS=149} [2024-10-14 14:43:53,909 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2024-10-14 14:43:53,910 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 149 transitions, 1539 flow [2024-10-14 14:43:53,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-14 14:43:53,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:53,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:53,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:43:54,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-14 14:43:54,116 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:54,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1263224652, now seen corresponding path program 2 times [2024-10-14 14:43:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:54,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743799485] [2024-10-14 14:43:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743799485] [2024-10-14 14:43:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743799485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116436940] [2024-10-14 14:43:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:54,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:54,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:54,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:54,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:43:54,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:54,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:54,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 14:43:54,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:54,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116436940] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:54,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:54,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-10-14 14:43:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504019649] [2024-10-14 14:43:54,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:54,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:43:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:43:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-14 14:43:54,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-10-14 14:43:54,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 149 transitions, 1539 flow. Second operand has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 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) [2024-10-14 14:43:54,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:54,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-10-14 14:43:54,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:56,346 INFO L124 PetriNetUnfolderBase]: 6472/10261 cut-off events. [2024-10-14 14:43:56,346 INFO L125 PetriNetUnfolderBase]: For 52693/53816 co-relation queries the response was YES. [2024-10-14 14:43:56,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47840 conditions, 10261 events. 6472/10261 cut-off events. For 52693/53816 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 69865 event pairs, 677 based on Foata normal form. 491/10637 useless extension candidates. Maximal degree in co-relation 32336. Up to 2557 conditions per place. [2024-10-14 14:43:56,455 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 169 selfloop transitions, 59 changer transitions 0/251 dead transitions. [2024-10-14 14:43:56,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 251 transitions, 2830 flow [2024-10-14 14:43:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:43:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:43:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-10-14 14:43:56,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-10-14 14:43:56,457 INFO L175 Difference]: Start difference. First operand has 78 places, 149 transitions, 1539 flow. Second operand 7 states and 161 transitions. [2024-10-14 14:43:56,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 251 transitions, 2830 flow [2024-10-14 14:43:56,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 251 transitions, 2766 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:56,612 INFO L231 Difference]: Finished difference. Result has 87 places, 170 transitions, 1937 flow [2024-10-14 14:43:56,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1937, PETRI_PLACES=87, PETRI_TRANSITIONS=170} [2024-10-14 14:43:56,613 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-10-14 14:43:56,613 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 170 transitions, 1937 flow [2024-10-14 14:43:56,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 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) [2024-10-14 14:43:56,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:56,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:56,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:56,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:56,818 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:43:56,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash 547899612, now seen corresponding path program 3 times [2024-10-14 14:43:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785984480] [2024-10-14 14:43:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785984480] [2024-10-14 14:44:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785984480] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888305313] [2024-10-14 14:44:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:44:00,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:00,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:00,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:00,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:44:00,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:44:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:00,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:44:00,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:01,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:02,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888305313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:02,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:02,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-10-14 14:44:02,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860388628] [2024-10-14 14:44:02,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:02,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 14:44:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 14:44:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-10-14 14:44:02,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-10-14 14:44:02,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 170 transitions, 1937 flow. Second operand has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:02,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:02,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-10-14 14:44:02,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:29,387 WARN L286 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 99 DAG size of output: 76 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-14 14:44:51,365 INFO L124 PetriNetUnfolderBase]: 68007/97484 cut-off events. [2024-10-14 14:44:51,366 INFO L125 PetriNetUnfolderBase]: For 565858/565858 co-relation queries the response was YES. [2024-10-14 14:44:51,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472129 conditions, 97484 events. 68007/97484 cut-off events. For 565858/565858 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 698551 event pairs, 2673 based on Foata normal form. 122/97605 useless extension candidates. Maximal degree in co-relation 355211. Up to 18091 conditions per place. [2024-10-14 14:44:52,299 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1263 selfloop transitions, 1219 changer transitions 932/3418 dead transitions. [2024-10-14 14:44:52,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 3418 transitions, 37585 flow [2024-10-14 14:44:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2024-10-14 14:44:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2024-10-14 14:44:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 3121 transitions. [2024-10-14 14:44:52,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49816440542697527 [2024-10-14 14:44:52,318 INFO L175 Difference]: Start difference. First operand has 87 places, 170 transitions, 1937 flow. Second operand 179 states and 3121 transitions. [2024-10-14 14:44:52,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 3418 transitions, 37585 flow [2024-10-14 14:44:55,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 3418 transitions, 36824 flow, removed 375 selfloop flow, removed 1 redundant places. [2024-10-14 14:44:55,111 INFO L231 Difference]: Finished difference. Result has 362 places, 1462 transitions, 21110 flow [2024-10-14 14:44:55,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=179, PETRI_FLOW=21110, PETRI_PLACES=362, PETRI_TRANSITIONS=1462} [2024-10-14 14:44:55,112 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 324 predicate places. [2024-10-14 14:44:55,112 INFO L471 AbstractCegarLoop]: Abstraction has has 362 places, 1462 transitions, 21110 flow [2024-10-14 14:44:55,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:55,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:55,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:55,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:44:55,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:55,314 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:44:55,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 134141366, now seen corresponding path program 4 times [2024-10-14 14:44:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691751890] [2024-10-14 14:44:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:57,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691751890] [2024-10-14 14:44:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691751890] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070985646] [2024-10-14 14:44:57,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:44:57,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:57,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:57,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:44:57,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:44:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:57,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:44:57,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:58,168 INFO L311 TraceCheckSpWp]: Computing backward predicates...