./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-figure1.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-figure1.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 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:39:08,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:39:08,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:39:08,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:39:08,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:39:08,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:39:08,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:39:08,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:39:08,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:39:08,099 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:39:08,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:39:08,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:39:08,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:39:08,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:39:08,102 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:39:08,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:39:08,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:39:08,114 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:39:08,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:39:08,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:39:08,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:39:08,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:39:08,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:39:08,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:39:08,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:39:08,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:39:08,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:39:08,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:39:08,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:39:08,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:39:08,120 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:39:08,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:39:08,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2024-10-14 14:39:08,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:39:08,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:39:08,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:39:08,343 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:39:08,344 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:39:08,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-10-14 14:39:09,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:39:09,819 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:39:09,819 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-10-14 14:39:09,829 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/187fc7c2b/836938e7c8874d0d95d705528f4df482/FLAG9acbea95f [2024-10-14 14:39:10,234 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/187fc7c2b/836938e7c8874d0d95d705528f4df482 [2024-10-14 14:39:10,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:39:10,239 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:39:10,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:39:10,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:39:10,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:39:10,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262a8733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10, skipping insertion in model container [2024-10-14 14:39:10,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,268 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:39:10,416 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-figure1.wvr.c[2017,2030] [2024-10-14 14:39:10,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:39:10,428 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:39:10,441 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-figure1.wvr.c[2017,2030] [2024-10-14 14:39:10,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:39:10,454 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:39:10,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10 WrapperNode [2024-10-14 14:39:10,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:39:10,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:39:10,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:39:10,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:39:10,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,483 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-10-14 14:39:10,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:39:10,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:39:10,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:39:10,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:39:10,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,494 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,503 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 14:39:10,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:39:10,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:39:10,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:39:10,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:39:10,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (1/1) ... [2024-10-14 14:39:10,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:39:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:10,549 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 14:39:10,551 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 14:39:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:39:10,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:39:10,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:39:10,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:39:10,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:39:10,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:39:10,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:39:10,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:39:10,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:39:10,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:39:10,602 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 14:39:10,684 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:39:10,686 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:39:10,834 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:39:10,835 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:39:10,948 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:39:10,949 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 14:39:10,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:39:10 BoogieIcfgContainer [2024-10-14 14:39:10,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:39:10,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:39:10,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:39:10,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:39:10,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:39:10" (1/3) ... [2024-10-14 14:39:10,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360f5b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:39:10, skipping insertion in model container [2024-10-14 14:39:10,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:10" (2/3) ... [2024-10-14 14:39:10,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360f5b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:39:10, skipping insertion in model container [2024-10-14 14:39:10,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:39:10" (3/3) ... [2024-10-14 14:39:10,962 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-10-14 14:39:10,979 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:39:10,981 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:39:10,981 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:39:11,026 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:39:11,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-14 14:39:11,080 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-14 14:39:11,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:39:11,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-14 14:39:11,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-14 14:39:11,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-14 14:39:11,098 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:39:11,104 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;@47e9afcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:39:11,105 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:39:11,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:39:11,113 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-14 14:39:11,113 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:39:11,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:11,114 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:11,114 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:11,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1772223302, now seen corresponding path program 1 times [2024-10-14 14:39:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:11,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016791321] [2024-10-14 14:39:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:11,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:11,324 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 14:39:11,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016791321] [2024-10-14 14:39:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016791321] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:39:11,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591220225] [2024-10-14 14:39:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:11,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:39:11,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:39:11,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:39:11,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-14 14:39:11,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 14:39:11,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:11,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-14 14:39:11,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:11,447 INFO L124 PetriNetUnfolderBase]: 76/154 cut-off events. [2024-10-14 14:39:11,447 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-14 14:39:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 154 events. 76/154 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 474 event pairs, 27 based on Foata normal form. 5/158 useless extension candidates. Maximal degree in co-relation 270. Up to 91 conditions per place. [2024-10-14 14:39:11,451 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-14 14:39:11,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 127 flow [2024-10-14 14:39:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:39:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:39:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-14 14:39:11,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-14 14:39:11,464 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 42 transitions. [2024-10-14 14:39:11,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 127 flow [2024-10-14 14:39:11,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:39:11,469 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-10-14 14:39:11,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-14 14:39:11,473 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-10-14 14:39:11,474 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-10-14 14:39:11,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 14:39:11,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:11,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:11,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:39:11,474 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:11,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1030321886, now seen corresponding path program 1 times [2024-10-14 14:39:11,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:11,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884146503] [2024-10-14 14:39:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:11,615 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 14:39:11,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884146503] [2024-10-14 14:39:11,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884146503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:11,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:11,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729516008] [2024-10-14 14:39:11,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:11,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:11,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:11,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:11,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:11,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:11,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:11,810 INFO L124 PetriNetUnfolderBase]: 132/249 cut-off events. [2024-10-14 14:39:11,810 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-14 14:39:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 249 events. 132/249 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 948 event pairs, 55 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 196. Up to 161 conditions per place. [2024-10-14 14:39:11,812 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 30 selfloop transitions, 7 changer transitions 3/42 dead transitions. [2024-10-14 14:39:11,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 42 transitions, 191 flow [2024-10-14 14:39:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-10-14 14:39:11,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-10-14 14:39:11,815 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 61 transitions. [2024-10-14 14:39:11,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 42 transitions, 191 flow [2024-10-14 14:39:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:39:11,818 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-10-14 14:39:11,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-10-14 14:39:11,819 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-10-14 14:39:11,819 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-10-14 14:39:11,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:11,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:11,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:11,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:39:11,820 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:11,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -470168276, now seen corresponding path program 2 times [2024-10-14 14:39:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433359640] [2024-10-14 14:39:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:11,923 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 14:39:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433359640] [2024-10-14 14:39:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433359640] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:39:11,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524924958] [2024-10-14 14:39:11,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:11,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:39:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:39:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:39:11,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:11,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 14:39:11,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:11,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:11,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:12,091 INFO L124 PetriNetUnfolderBase]: 150/287 cut-off events. [2024-10-14 14:39:12,091 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-10-14 14:39:12,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 287 events. 150/287 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1150 event pairs, 4 based on Foata normal form. 13/300 useless extension candidates. Maximal degree in co-relation 357. Up to 122 conditions per place. [2024-10-14 14:39:12,096 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 44 selfloop transitions, 10 changer transitions 1/57 dead transitions. [2024-10-14 14:39:12,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 57 transitions, 331 flow [2024-10-14 14:39:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:39:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:39:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-10-14 14:39:12,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-10-14 14:39:12,100 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 80 transitions. [2024-10-14 14:39:12,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 57 transitions, 331 flow [2024-10-14 14:39:12,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 329 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:12,103 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 186 flow [2024-10-14 14:39:12,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-10-14 14:39:12,103 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2024-10-14 14:39:12,104 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 186 flow [2024-10-14 14:39:12,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 14:39:12,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:12,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:12,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:39:12,104 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:12,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash -4804536, now seen corresponding path program 3 times [2024-10-14 14:39:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004889665] [2024-10-14 14:39:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:12,162 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 14:39:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004889665] [2024-10-14 14:39:12,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004889665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:12,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:12,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808230308] [2024-10-14 14:39:12,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:12,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:12,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:12,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:12,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:12,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:12,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:12,283 INFO L124 PetriNetUnfolderBase]: 197/374 cut-off events. [2024-10-14 14:39:12,283 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2024-10-14 14:39:12,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 374 events. 197/374 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1514 event pairs, 63 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 852. Up to 167 conditions per place. [2024-10-14 14:39:12,286 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 44 selfloop transitions, 10 changer transitions 2/58 dead transitions. [2024-10-14 14:39:12,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 433 flow [2024-10-14 14:39:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-14 14:39:12,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-14 14:39:12,289 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 186 flow. Second operand 5 states and 58 transitions. [2024-10-14 14:39:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 433 flow [2024-10-14 14:39:12,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:39:12,294 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 237 flow [2024-10-14 14:39:12,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-10-14 14:39:12,296 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-10-14 14:39:12,296 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 237 flow [2024-10-14 14:39:12,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:12,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:12,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:12,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:39:12,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:12,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1140878868, now seen corresponding path program 4 times [2024-10-14 14:39:12,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572136614] [2024-10-14 14:39:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:12,382 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 14:39:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572136614] [2024-10-14 14:39:12,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572136614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990617095] [2024-10-14 14:39:12,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:12,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:12,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:12,386 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 14:39:12,387 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 14:39:12,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:12,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 14:39:12,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:12,517 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 14:39:12,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:12,562 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 14:39:12,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990617095] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:12,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-10-14 14:39:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130379052] [2024-10-14 14:39:12,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:12,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:39:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:39:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-14 14:39:12,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 237 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 14:39:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:12,807 INFO L124 PetriNetUnfolderBase]: 363/634 cut-off events. [2024-10-14 14:39:12,807 INFO L125 PetriNetUnfolderBase]: For 1452/1452 co-relation queries the response was YES. [2024-10-14 14:39:12,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 634 events. 363/634 cut-off events. For 1452/1452 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2647 event pairs, 20 based on Foata normal form. 13/647 useless extension candidates. Maximal degree in co-relation 1993. Up to 147 conditions per place. [2024-10-14 14:39:12,811 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 73 selfloop transitions, 40 changer transitions 1/115 dead transitions. [2024-10-14 14:39:12,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 884 flow [2024-10-14 14:39:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:39:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:39:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 149 transitions. [2024-10-14 14:39:12,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45151515151515154 [2024-10-14 14:39:12,814 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 237 flow. Second operand 15 states and 149 transitions. [2024-10-14 14:39:12,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 884 flow [2024-10-14 14:39:12,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 115 transitions, 846 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-10-14 14:39:12,820 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 556 flow [2024-10-14 14:39:12,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=556, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-10-14 14:39:12,820 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-10-14 14:39:12,821 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 556 flow [2024-10-14 14:39:12,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 14:39:12,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:12,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:12,837 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 14:39:13,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:13,026 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:13,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2128166476, now seen corresponding path program 5 times [2024-10-14 14:39:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454910731] [2024-10-14 14:39:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:13,095 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 14:39:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454910731] [2024-10-14 14:39:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454910731] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320394967] [2024-10-14 14:39:13,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:39:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:13,097 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 14:39:13,098 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 14:39:13,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:13,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:13,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 14:39:13,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:13,182 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 14:39:13,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:13,217 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 14:39:13,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320394967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:13,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:13,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-10-14 14:39:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088020897] [2024-10-14 14:39:13,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:13,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:39:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:39:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-14 14:39:13,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:13,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 556 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 14:39:13,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:13,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:13,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:13,417 INFO L124 PetriNetUnfolderBase]: 349/618 cut-off events. [2024-10-14 14:39:13,417 INFO L125 PetriNetUnfolderBase]: For 2771/2771 co-relation queries the response was YES. [2024-10-14 14:39:13,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 618 events. 349/618 cut-off events. For 2771/2771 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2583 event pairs, 68 based on Foata normal form. 13/631 useless extension candidates. Maximal degree in co-relation 2374. Up to 223 conditions per place. [2024-10-14 14:39:13,421 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 65 selfloop transitions, 37 changer transitions 1/104 dead transitions. [2024-10-14 14:39:13,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 1041 flow [2024-10-14 14:39:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:39:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:39:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-10-14 14:39:13,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-10-14 14:39:13,423 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 556 flow. Second operand 8 states and 89 transitions. [2024-10-14 14:39:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 1041 flow [2024-10-14 14:39:13,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 902 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:13,433 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 678 flow [2024-10-14 14:39:13,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=678, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-10-14 14:39:13,435 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-10-14 14:39:13,435 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 678 flow [2024-10-14 14:39:13,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 14:39:13,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:13,435 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:13,447 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 14:39:13,639 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,SelfDestructingSolverStorable5 [2024-10-14 14:39:13,640 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:13,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1603510646, now seen corresponding path program 6 times [2024-10-14 14:39:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13178989] [2024-10-14 14:39:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:13,690 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 14:39:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:13,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13178989] [2024-10-14 14:39:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13178989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:13,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:13,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:13,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479501595] [2024-10-14 14:39:13,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:13,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:13,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:13,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:13,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:13,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:13,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 678 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:13,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:13,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:13,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:13,786 INFO L124 PetriNetUnfolderBase]: 278/508 cut-off events. [2024-10-14 14:39:13,787 INFO L125 PetriNetUnfolderBase]: For 2515/2519 co-relation queries the response was YES. [2024-10-14 14:39:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2229 conditions, 508 events. 278/508 cut-off events. For 2515/2519 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2170 event pairs, 83 based on Foata normal form. 2/499 useless extension candidates. Maximal degree in co-relation 2070. Up to 249 conditions per place. [2024-10-14 14:39:13,791 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 48 selfloop transitions, 22 changer transitions 2/84 dead transitions. [2024-10-14 14:39:13,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 883 flow [2024-10-14 14:39:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-10-14 14:39:13,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 14:39:13,792 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 678 flow. Second operand 5 states and 55 transitions. [2024-10-14 14:39:13,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 883 flow [2024-10-14 14:39:13,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 814 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-10-14 14:39:13,801 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 647 flow [2024-10-14 14:39:13,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=647, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-10-14 14:39:13,802 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-10-14 14:39:13,802 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 647 flow [2024-10-14 14:39:13,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 14:39:13,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:13,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:13,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:39:13,802 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:13,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1799144741, now seen corresponding path program 1 times [2024-10-14 14:39:13,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:13,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144855231] [2024-10-14 14:39:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:13,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:13,862 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 14:39:13,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144855231] [2024-10-14 14:39:13,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144855231] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470187630] [2024-10-14 14:39:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:13,867 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 14:39:13,868 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 14:39:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:13,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:13,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:13,953 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 14:39:13,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:13,986 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 14:39:13,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470187630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:13,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:13,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 5 [2024-10-14 14:39:13,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340290890] [2024-10-14 14:39:13,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:13,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:39:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:39:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:39:13,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-14 14:39:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 647 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 14:39:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-14 14:39:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:14,104 INFO L124 PetriNetUnfolderBase]: 445/867 cut-off events. [2024-10-14 14:39:14,104 INFO L125 PetriNetUnfolderBase]: For 4012/4026 co-relation queries the response was YES. [2024-10-14 14:39:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3584 conditions, 867 events. 445/867 cut-off events. For 4012/4026 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4415 event pairs, 68 based on Foata normal form. 18/880 useless extension candidates. Maximal degree in co-relation 2707. Up to 337 conditions per place. [2024-10-14 14:39:14,110 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 92 selfloop transitions, 5 changer transitions 15/130 dead transitions. [2024-10-14 14:39:14,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 130 transitions, 1407 flow [2024-10-14 14:39:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:39:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:39:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-14 14:39:14,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-10-14 14:39:14,112 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 647 flow. Second operand 4 states and 62 transitions. [2024-10-14 14:39:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 130 transitions, 1407 flow [2024-10-14 14:39:14,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 130 transitions, 1315 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-14 14:39:14,119 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 632 flow [2024-10-14 14:39:14,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=632, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-10-14 14:39:14,120 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 48 predicate places. [2024-10-14 14:39:14,120 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 632 flow [2024-10-14 14:39:14,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 14:39:14,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:14,121 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:14,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:39:14,325 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 14:39:14,326 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:14,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2126428685, now seen corresponding path program 2 times [2024-10-14 14:39:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421185526] [2024-10-14 14:39:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:14,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:14,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421185526] [2024-10-14 14:39:14,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421185526] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:14,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236043848] [2024-10-14 14:39:14,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:14,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:14,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:14,398 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 14:39:14,399 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 14:39:14,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:14,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:14,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:14,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:14,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236043848] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:14,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:14,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199982829] [2024-10-14 14:39:14,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:14,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:14,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:14,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 632 flow. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 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 14:39:14,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:14,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:14,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:15,068 INFO L124 PetriNetUnfolderBase]: 1136/1910 cut-off events. [2024-10-14 14:39:15,069 INFO L125 PetriNetUnfolderBase]: For 7252/7252 co-relation queries the response was YES. [2024-10-14 14:39:15,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 conditions, 1910 events. 1136/1910 cut-off events. For 7252/7252 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9355 event pairs, 63 based on Foata normal form. 70/1962 useless extension candidates. Maximal degree in co-relation 6379. Up to 376 conditions per place. [2024-10-14 14:39:15,082 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 149 selfloop transitions, 100 changer transitions 7/257 dead transitions. [2024-10-14 14:39:15,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 257 transitions, 2392 flow [2024-10-14 14:39:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 14:39:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-14 14:39:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 283 transitions. [2024-10-14 14:39:15,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44357366771159873 [2024-10-14 14:39:15,083 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 632 flow. Second operand 29 states and 283 transitions. [2024-10-14 14:39:15,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 257 transitions, 2392 flow [2024-10-14 14:39:15,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 257 transitions, 2344 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:15,095 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 1449 flow [2024-10-14 14:39:15,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1449, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-10-14 14:39:15,096 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 93 predicate places. [2024-10-14 14:39:15,096 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 1449 flow [2024-10-14 14:39:15,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 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 14:39:15,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:15,096 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:15,109 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 14:39:15,297 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 14:39:15,297 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:15,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -165625825, now seen corresponding path program 3 times [2024-10-14 14:39:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232425213] [2024-10-14 14:39:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232425213] [2024-10-14 14:39:15,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232425213] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:15,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755938242] [2024-10-14 14:39:15,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:15,380 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 14:39:15,382 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 14:39:15,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:39:15,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:15,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:15,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:15,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755938242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:15,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-14 14:39:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725953967] [2024-10-14 14:39:15,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:15,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:39:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:39:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-14 14:39:15,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:15,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 1449 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 14:39:15,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:15,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:15,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:16,029 INFO L124 PetriNetUnfolderBase]: 1542/2585 cut-off events. [2024-10-14 14:39:16,029 INFO L125 PetriNetUnfolderBase]: For 24180/24180 co-relation queries the response was YES. [2024-10-14 14:39:16,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14527 conditions, 2585 events. 1542/2585 cut-off events. For 24180/24180 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13410 event pairs, 85 based on Foata normal form. 24/2609 useless extension candidates. Maximal degree in co-relation 13445. Up to 654 conditions per place. [2024-10-14 14:39:16,049 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 114 selfloop transitions, 139 changer transitions 20/274 dead transitions. [2024-10-14 14:39:16,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 274 transitions, 3444 flow [2024-10-14 14:39:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:39:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:39:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2024-10-14 14:39:16,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-10-14 14:39:16,050 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 1449 flow. Second operand 15 states and 147 transitions. [2024-10-14 14:39:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 274 transitions, 3444 flow [2024-10-14 14:39:16,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 274 transitions, 3225 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-10-14 14:39:16,096 INFO L231 Difference]: Finished difference. Result has 133 places, 187 transitions, 2498 flow [2024-10-14 14:39:16,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2498, PETRI_PLACES=133, PETRI_TRANSITIONS=187} [2024-10-14 14:39:16,097 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 109 predicate places. [2024-10-14 14:39:16,100 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 187 transitions, 2498 flow [2024-10-14 14:39:16,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 14:39:16,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:16,100 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:16,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:39:16,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-14 14:39:16,301 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:16,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1270254091, now seen corresponding path program 4 times [2024-10-14 14:39:16,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:16,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270492116] [2024-10-14 14:39:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:16,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270492116] [2024-10-14 14:39:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270492116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118488612] [2024-10-14 14:39:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:16,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:16,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:39:16,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:16,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:16,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:16,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118488612] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:16,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475610946] [2024-10-14 14:39:16,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:16,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:16,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:16,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:16,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 187 transitions, 2498 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 14:39:16,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:17,160 INFO L124 PetriNetUnfolderBase]: 2092/3460 cut-off events. [2024-10-14 14:39:17,161 INFO L125 PetriNetUnfolderBase]: For 49399/49399 co-relation queries the response was YES. [2024-10-14 14:39:17,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21949 conditions, 3460 events. 2092/3460 cut-off events. For 49399/49399 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18540 event pairs, 203 based on Foata normal form. 18/3478 useless extension candidates. Maximal degree in co-relation 19426. Up to 762 conditions per place. [2024-10-14 14:39:17,196 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 186 selfloop transitions, 136 changer transitions 3/326 dead transitions. [2024-10-14 14:39:17,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 326 transitions, 4745 flow [2024-10-14 14:39:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 14:39:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 14:39:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 169 transitions. [2024-10-14 14:39:17,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45187165775401067 [2024-10-14 14:39:17,198 INFO L175 Difference]: Start difference. First operand has 133 places, 187 transitions, 2498 flow. Second operand 17 states and 169 transitions. [2024-10-14 14:39:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 326 transitions, 4745 flow [2024-10-14 14:39:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 326 transitions, 4548 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-10-14 14:39:17,313 INFO L231 Difference]: Finished difference. Result has 152 places, 236 transitions, 3470 flow [2024-10-14 14:39:17,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3470, PETRI_PLACES=152, PETRI_TRANSITIONS=236} [2024-10-14 14:39:17,313 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 128 predicate places. [2024-10-14 14:39:17,313 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 236 transitions, 3470 flow [2024-10-14 14:39:17,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 14:39:17,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:17,314 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:17,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:39:17,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:17,514 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:17,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 547728277, now seen corresponding path program 5 times [2024-10-14 14:39:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:17,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037390282] [2024-10-14 14:39:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:17,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:17,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037390282] [2024-10-14 14:39:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037390282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382176161] [2024-10-14 14:39:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:39:17,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:17,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:17,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:17,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:39:17,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 14:39:17,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:17,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:17,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:17,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:17,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382176161] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:17,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:17,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-14 14:39:17,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072090220] [2024-10-14 14:39:17,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:17,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:39:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:39:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:39:17,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:17,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 236 transitions, 3470 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:17,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:17,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:17,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:18,616 INFO L124 PetriNetUnfolderBase]: 2600/4304 cut-off events. [2024-10-14 14:39:18,617 INFO L125 PetriNetUnfolderBase]: For 79527/79527 co-relation queries the response was YES. [2024-10-14 14:39:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28936 conditions, 4304 events. 2600/4304 cut-off events. For 79527/79527 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 23949 event pairs, 108 based on Foata normal form. 61/4365 useless extension candidates. Maximal degree in co-relation 25949. Up to 1308 conditions per place. [2024-10-14 14:39:18,647 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 164 selfloop transitions, 228 changer transitions 4/397 dead transitions. [2024-10-14 14:39:18,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 397 transitions, 6023 flow [2024-10-14 14:39:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:39:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:39:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 164 transitions. [2024-10-14 14:39:18,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-10-14 14:39:18,650 INFO L175 Difference]: Start difference. First operand has 152 places, 236 transitions, 3470 flow. Second operand 16 states and 164 transitions. [2024-10-14 14:39:18,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 397 transitions, 6023 flow [2024-10-14 14:39:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 397 transitions, 5600 flow, removed 197 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:18,876 INFO L231 Difference]: Finished difference. Result has 173 places, 302 transitions, 4944 flow [2024-10-14 14:39:18,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4944, PETRI_PLACES=173, PETRI_TRANSITIONS=302} [2024-10-14 14:39:18,877 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 149 predicate places. [2024-10-14 14:39:18,877 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 302 transitions, 4944 flow [2024-10-14 14:39:18,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:18,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:18,877 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:18,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:39:19,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:19,079 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:19,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 792763869, now seen corresponding path program 6 times [2024-10-14 14:39:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454796721] [2024-10-14 14:39:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454796721] [2024-10-14 14:39:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454796721] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785037669] [2024-10-14 14:39:19,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:39:19,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:19,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:19,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:19,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:39:19,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-14 14:39:19,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:19,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:19,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:19,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785037669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:19,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:19,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-14 14:39:19,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828461166] [2024-10-14 14:39:19,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:19,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:39:19,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:39:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:39:19,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:19,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 302 transitions, 4944 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 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 14:39:19,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:19,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:19,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:20,367 INFO L124 PetriNetUnfolderBase]: 3015/5016 cut-off events. [2024-10-14 14:39:20,367 INFO L125 PetriNetUnfolderBase]: For 97131/97131 co-relation queries the response was YES. [2024-10-14 14:39:20,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 5016 events. 3015/5016 cut-off events. For 97131/97131 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 29013 event pairs, 128 based on Foata normal form. 46/5062 useless extension candidates. Maximal degree in co-relation 34430. Up to 908 conditions per place. [2024-10-14 14:39:20,403 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 199 selfloop transitions, 291 changer transitions 2/493 dead transitions. [2024-10-14 14:39:20,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 493 transitions, 8132 flow [2024-10-14 14:39:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 14:39:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-14 14:39:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 255 transitions. [2024-10-14 14:39:20,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4458041958041958 [2024-10-14 14:39:20,405 INFO L175 Difference]: Start difference. First operand has 173 places, 302 transitions, 4944 flow. Second operand 26 states and 255 transitions. [2024-10-14 14:39:20,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 493 transitions, 8132 flow [2024-10-14 14:39:20,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 493 transitions, 8039 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:20,687 INFO L231 Difference]: Finished difference. Result has 208 places, 364 transitions, 7061 flow [2024-10-14 14:39:20,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7061, PETRI_PLACES=208, PETRI_TRANSITIONS=364} [2024-10-14 14:39:20,688 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 184 predicate places. [2024-10-14 14:39:20,688 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 364 transitions, 7061 flow [2024-10-14 14:39:20,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 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 14:39:20,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:20,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:20,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:39:20,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 14:39:20,889 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:20,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1868475025, now seen corresponding path program 7 times [2024-10-14 14:39:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:20,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570991843] [2024-10-14 14:39:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570991843] [2024-10-14 14:39:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570991843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131997027] [2024-10-14 14:39:20,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:39:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:20,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:20,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:39:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:20,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:20,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:21,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:21,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131997027] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:21,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:21,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-14 14:39:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637593528] [2024-10-14 14:39:21,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:21,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:39:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:39:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:39:21,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:21,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 364 transitions, 7061 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 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 14:39:21,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:21,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:22,094 INFO L124 PetriNetUnfolderBase]: 3021/5038 cut-off events. [2024-10-14 14:39:22,094 INFO L125 PetriNetUnfolderBase]: For 143467/143467 co-relation queries the response was YES. [2024-10-14 14:39:22,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40025 conditions, 5038 events. 3021/5038 cut-off events. For 143467/143467 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29537 event pairs, 409 based on Foata normal form. 8/5046 useless extension candidates. Maximal degree in co-relation 39194. Up to 1299 conditions per place. [2024-10-14 14:39:22,146 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 248 selfloop transitions, 192 changer transitions 4/445 dead transitions. [2024-10-14 14:39:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 445 transitions, 8876 flow [2024-10-14 14:39:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:39:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:39:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-10-14 14:39:22,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.493006993006993 [2024-10-14 14:39:22,148 INFO L175 Difference]: Start difference. First operand has 208 places, 364 transitions, 7061 flow. Second operand 13 states and 141 transitions. [2024-10-14 14:39:22,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 445 transitions, 8876 flow [2024-10-14 14:39:22,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 445 transitions, 8471 flow, removed 113 selfloop flow, removed 13 redundant places. [2024-10-14 14:39:22,715 INFO L231 Difference]: Finished difference. Result has 207 places, 362 transitions, 7054 flow [2024-10-14 14:39:22,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7054, PETRI_PLACES=207, PETRI_TRANSITIONS=362} [2024-10-14 14:39:22,716 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 183 predicate places. [2024-10-14 14:39:22,716 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 362 transitions, 7054 flow [2024-10-14 14:39:22,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 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 14:39:22,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:22,716 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:22,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 14:39:22,919 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:22,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash 482093303, now seen corresponding path program 8 times [2024-10-14 14:39:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:22,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48708793] [2024-10-14 14:39:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:22,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48708793] [2024-10-14 14:39:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48708793] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:22,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925776487] [2024-10-14 14:39:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:22,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:22,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:22,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:39:23,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:23,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:23,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:23,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:23,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:23,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925776487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:23,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:23,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-14 14:39:23,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938261322] [2024-10-14 14:39:23,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:23,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:39:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:39:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:39:23,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 362 transitions, 7054 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 14:39:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:23,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:24,405 INFO L124 PetriNetUnfolderBase]: 3259/5418 cut-off events. [2024-10-14 14:39:24,405 INFO L125 PetriNetUnfolderBase]: For 165094/165094 co-relation queries the response was YES. [2024-10-14 14:39:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43858 conditions, 5418 events. 3259/5418 cut-off events. For 165094/165094 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 31751 event pairs, 219 based on Foata normal form. 54/5472 useless extension candidates. Maximal degree in co-relation 42663. Up to 1233 conditions per place. [2024-10-14 14:39:24,444 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 178 selfloop transitions, 351 changer transitions 6/536 dead transitions. [2024-10-14 14:39:24,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 536 transitions, 10443 flow [2024-10-14 14:39:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 14:39:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-14 14:39:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 244 transitions. [2024-10-14 14:39:24,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42657342657342656 [2024-10-14 14:39:24,447 INFO L175 Difference]: Start difference. First operand has 207 places, 362 transitions, 7054 flow. Second operand 26 states and 244 transitions. [2024-10-14 14:39:24,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 536 transitions, 10443 flow [2024-10-14 14:39:25,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 536 transitions, 10027 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-10-14 14:39:25,094 INFO L231 Difference]: Finished difference. Result has 226 places, 426 transitions, 9155 flow [2024-10-14 14:39:25,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6646, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9155, PETRI_PLACES=226, PETRI_TRANSITIONS=426} [2024-10-14 14:39:25,095 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 202 predicate places. [2024-10-14 14:39:25,095 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 426 transitions, 9155 flow [2024-10-14 14:39:25,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 14:39:25,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:25,095 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:25,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:25,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:39:25,296 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:25,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:25,296 INFO L85 PathProgramCache]: Analyzing trace with hash -997991343, now seen corresponding path program 9 times [2024-10-14 14:39:25,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:25,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708931944] [2024-10-14 14:39:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:25,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708931944] [2024-10-14 14:39:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708931944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347665195] [2024-10-14 14:39:25,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:25,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:25,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:25,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:39:25,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 14:39:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:25,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:25,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:25,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:25,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347665195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:25,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:25,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:25,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969537694] [2024-10-14 14:39:25,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:25,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:25,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:25,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 426 transitions, 9155 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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 14:39:25,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:25,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:25,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:26,879 INFO L124 PetriNetUnfolderBase]: 3688/6108 cut-off events. [2024-10-14 14:39:26,879 INFO L125 PetriNetUnfolderBase]: For 218762/218762 co-relation queries the response was YES. [2024-10-14 14:39:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52639 conditions, 6108 events. 3688/6108 cut-off events. For 218762/218762 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 36447 event pairs, 1297 based on Foata normal form. 18/6126 useless extension candidates. Maximal degree in co-relation 51351. Up to 4645 conditions per place. [2024-10-14 14:39:26,928 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 468 selfloop transitions, 72 changer transitions 2/543 dead transitions. [2024-10-14 14:39:26,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 543 transitions, 11837 flow [2024-10-14 14:39:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:39:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:39:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 157 transitions. [2024-10-14 14:39:26,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-10-14 14:39:26,929 INFO L175 Difference]: Start difference. First operand has 226 places, 426 transitions, 9155 flow. Second operand 16 states and 157 transitions. [2024-10-14 14:39:26,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 543 transitions, 11837 flow [2024-10-14 14:39:28,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 543 transitions, 11367 flow, removed 101 selfloop flow, removed 15 redundant places. [2024-10-14 14:39:28,025 INFO L231 Difference]: Finished difference. Result has 231 places, 459 transitions, 9569 flow [2024-10-14 14:39:28,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9569, PETRI_PLACES=231, PETRI_TRANSITIONS=459} [2024-10-14 14:39:28,025 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 207 predicate places. [2024-10-14 14:39:28,026 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 459 transitions, 9569 flow [2024-10-14 14:39:28,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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 14:39:28,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:28,026 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:28,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:28,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 14:39:28,227 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:28,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1950427285, now seen corresponding path program 10 times [2024-10-14 14:39:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899642455] [2024-10-14 14:39:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:28,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:28,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899642455] [2024-10-14 14:39:28,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899642455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236792076] [2024-10-14 14:39:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:28,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:28,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:28,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:39:28,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:28,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:28,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:28,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:28,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236792076] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:28,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143117916] [2024-10-14 14:39:28,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:28,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:28,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:28,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 459 transitions, 9569 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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 14:39:28,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:28,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:29,678 INFO L124 PetriNetUnfolderBase]: 4046/6677 cut-off events. [2024-10-14 14:39:29,679 INFO L125 PetriNetUnfolderBase]: For 286766/286766 co-relation queries the response was YES. [2024-10-14 14:39:29,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59115 conditions, 6677 events. 4046/6677 cut-off events. For 286766/286766 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 40173 event pairs, 629 based on Foata normal form. 84/6761 useless extension candidates. Maximal degree in co-relation 57899. Up to 2926 conditions per place. [2024-10-14 14:39:29,747 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 355 selfloop transitions, 251 changer transitions 3/610 dead transitions. [2024-10-14 14:39:29,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 610 transitions, 13029 flow [2024-10-14 14:39:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 14:39:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-14 14:39:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 204 transitions. [2024-10-14 14:39:29,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-10-14 14:39:29,748 INFO L175 Difference]: Start difference. First operand has 231 places, 459 transitions, 9569 flow. Second operand 20 states and 204 transitions. [2024-10-14 14:39:29,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 610 transitions, 13029 flow [2024-10-14 14:39:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 610 transitions, 12686 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-10-14 14:39:31,204 INFO L231 Difference]: Finished difference. Result has 256 places, 493 transitions, 11196 flow [2024-10-14 14:39:31,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9278, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11196, PETRI_PLACES=256, PETRI_TRANSITIONS=493} [2024-10-14 14:39:31,204 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 232 predicate places. [2024-10-14 14:39:31,204 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 493 transitions, 11196 flow [2024-10-14 14:39:31,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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 14:39:31,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:31,205 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:31,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 14:39:31,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 14:39:31,405 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:31,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1449933605, now seen corresponding path program 11 times [2024-10-14 14:39:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120059149] [2024-10-14 14:39:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120059149] [2024-10-14 14:39:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120059149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392567991] [2024-10-14 14:39:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:39:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:31,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:39:31,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 14:39:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:31,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:31,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:31,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:39:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392567991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:31,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:31,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-14 14:39:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249758168] [2024-10-14 14:39:31,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:31,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:39:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:39:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:39:31,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:31,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 493 transitions, 11196 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 14:39:31,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:31,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:33,144 INFO L124 PetriNetUnfolderBase]: 4247/6999 cut-off events. [2024-10-14 14:39:33,144 INFO L125 PetriNetUnfolderBase]: For 351308/351308 co-relation queries the response was YES. [2024-10-14 14:39:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66004 conditions, 6999 events. 4247/6999 cut-off events. For 351308/351308 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 42287 event pairs, 613 based on Foata normal form. 54/7053 useless extension candidates. Maximal degree in co-relation 65472. Up to 2707 conditions per place. [2024-10-14 14:39:33,204 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 327 selfloop transitions, 282 changer transitions 2/612 dead transitions. [2024-10-14 14:39:33,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 612 transitions, 14182 flow [2024-10-14 14:39:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 14:39:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-14 14:39:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 185 transitions. [2024-10-14 14:39:33,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-10-14 14:39:33,205 INFO L175 Difference]: Start difference. First operand has 256 places, 493 transitions, 11196 flow. Second operand 20 states and 185 transitions. [2024-10-14 14:39:33,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 612 transitions, 14182 flow [2024-10-14 14:39:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 612 transitions, 13831 flow, removed 160 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:34,900 INFO L231 Difference]: Finished difference. Result has 279 places, 516 transitions, 12581 flow [2024-10-14 14:39:34,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10919, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12581, PETRI_PLACES=279, PETRI_TRANSITIONS=516} [2024-10-14 14:39:34,901 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 255 predicate places. [2024-10-14 14:39:34,901 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 516 transitions, 12581 flow [2024-10-14 14:39:34,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 14:39:34,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:34,901 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:34,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:35,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 14:39:35,102 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:35,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 772313305, now seen corresponding path program 12 times [2024-10-14 14:39:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:35,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564360673] [2024-10-14 14:39:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564360673] [2024-10-14 14:39:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564360673] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996693516] [2024-10-14 14:39:35,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:39:35,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:35,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:35,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:39:35,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-14 14:39:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:35,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:35,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996693516] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:35,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:35,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-14 14:39:35,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742095196] [2024-10-14 14:39:35,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:35,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:39:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:39:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:39:35,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:35,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 516 transitions, 12581 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 14:39:35,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:35,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:35,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:36,995 INFO L124 PetriNetUnfolderBase]: 4244/6994 cut-off events. [2024-10-14 14:39:36,996 INFO L125 PetriNetUnfolderBase]: For 382662/382662 co-relation queries the response was YES. [2024-10-14 14:39:37,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68881 conditions, 6994 events. 4244/6994 cut-off events. For 382662/382662 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 42447 event pairs, 1565 based on Foata normal form. 8/7002 useless extension candidates. Maximal degree in co-relation 68240. Up to 5614 conditions per place. [2024-10-14 14:39:37,060 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 497 selfloop transitions, 71 changer transitions 2/571 dead transitions. [2024-10-14 14:39:37,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 571 transitions, 14396 flow [2024-10-14 14:39:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:39:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:39:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-10-14 14:39:37,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-10-14 14:39:37,061 INFO L175 Difference]: Start difference. First operand has 279 places, 516 transitions, 12581 flow. Second operand 11 states and 115 transitions. [2024-10-14 14:39:37,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 571 transitions, 14396 flow [2024-10-14 14:39:38,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 571 transitions, 14123 flow, removed 79 selfloop flow, removed 15 redundant places. [2024-10-14 14:39:38,831 INFO L231 Difference]: Finished difference. Result has 272 places, 513 transitions, 12451 flow [2024-10-14 14:39:38,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12287, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12451, PETRI_PLACES=272, PETRI_TRANSITIONS=513} [2024-10-14 14:39:38,831 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 248 predicate places. [2024-10-14 14:39:38,831 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 513 transitions, 12451 flow [2024-10-14 14:39:38,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 14:39:38,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:38,832 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:38,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 14:39:39,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:39,032 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:39,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash -824854552, now seen corresponding path program 13 times [2024-10-14 14:39:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803636300] [2024-10-14 14:39:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:39:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803636300] [2024-10-14 14:39:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803636300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7294510] [2024-10-14 14:39:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:39:39,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:39,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:39:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:39,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:39:39,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:39,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7294510] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:39,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:39,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 7 [2024-10-14 14:39:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802254686] [2024-10-14 14:39:39,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:39,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:39:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:39:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:39:39,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-14 14:39:39,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 513 transitions, 12451 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 14:39:39,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:39,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-14 14:39:39,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:41,385 INFO L124 PetriNetUnfolderBase]: 5684/10101 cut-off events. [2024-10-14 14:39:41,385 INFO L125 PetriNetUnfolderBase]: For 538247/539063 co-relation queries the response was YES. [2024-10-14 14:39:41,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97682 conditions, 10101 events. 5684/10101 cut-off events. For 538247/539063 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 74649 event pairs, 521 based on Foata normal form. 338/10320 useless extension candidates. Maximal degree in co-relation 96106. Up to 2579 conditions per place. [2024-10-14 14:39:41,528 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 892 selfloop transitions, 10 changer transitions 99/1160 dead transitions. [2024-10-14 14:39:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1160 transitions, 30613 flow [2024-10-14 14:39:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-14 14:39:41,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-10-14 14:39:41,529 INFO L175 Difference]: Start difference. First operand has 272 places, 513 transitions, 12451 flow. Second operand 5 states and 80 transitions. [2024-10-14 14:39:41,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1160 transitions, 30613 flow [2024-10-14 14:39:45,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1160 transitions, 30382 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-14 14:39:45,404 INFO L231 Difference]: Finished difference. Result has 270 places, 509 transitions, 12174 flow [2024-10-14 14:39:45,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12350, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12174, PETRI_PLACES=270, PETRI_TRANSITIONS=509} [2024-10-14 14:39:45,405 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 246 predicate places. [2024-10-14 14:39:45,405 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 509 transitions, 12174 flow [2024-10-14 14:39:45,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 14:39:45,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:45,405 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:45,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:39:45,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:45,606 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:45,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash -979274424, now seen corresponding path program 14 times [2024-10-14 14:39:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:45,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365848473] [2024-10-14 14:39:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365848473] [2024-10-14 14:39:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365848473] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291257216] [2024-10-14 14:39:45,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:45,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:45,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:39:45,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:45,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:39:45,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291257216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:45,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:45,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-14 14:39:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378773227] [2024-10-14 14:39:45,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:45,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:39:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:39:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:39:45,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:45,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 509 transitions, 12174 flow. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 14:39:45,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:45,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:45,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:49,940 INFO L124 PetriNetUnfolderBase]: 10154/16572 cut-off events. [2024-10-14 14:39:49,941 INFO L125 PetriNetUnfolderBase]: For 975223/975223 co-relation queries the response was YES. [2024-10-14 14:39:50,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170980 conditions, 16572 events. 10154/16572 cut-off events. For 975223/975223 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 113026 event pairs, 410 based on Foata normal form. 185/16757 useless extension candidates. Maximal degree in co-relation 169366. Up to 3452 conditions per place. [2024-10-14 14:39:50,232 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 462 selfloop transitions, 611 changer transitions 31/1105 dead transitions. [2024-10-14 14:39:50,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1105 transitions, 26345 flow [2024-10-14 14:39:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-14 14:39:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-14 14:39:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 420 transitions. [2024-10-14 14:39:50,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-10-14 14:39:50,234 INFO L175 Difference]: Start difference. First operand has 270 places, 509 transitions, 12174 flow. Second operand 44 states and 420 transitions. [2024-10-14 14:39:50,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1105 transitions, 26345 flow [2024-10-14 14:39:58,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1105 transitions, 25963 flow, removed 191 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:58,397 INFO L231 Difference]: Finished difference. Result has 333 places, 745 transitions, 20640 flow [2024-10-14 14:39:58,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12154, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=20640, PETRI_PLACES=333, PETRI_TRANSITIONS=745} [2024-10-14 14:39:58,398 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 309 predicate places. [2024-10-14 14:39:58,398 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 745 transitions, 20640 flow [2024-10-14 14:39:58,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 14:39:58,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:58,398 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:58,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:58,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:58,599 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:58,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 486900982, now seen corresponding path program 15 times [2024-10-14 14:39:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036232464] [2024-10-14 14:39:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:58,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036232464] [2024-10-14 14:39:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036232464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891181249] [2024-10-14 14:39:58,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:58,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:58,692 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:39:58,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:39:58,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 14:39:58,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:58,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:39:58,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:58,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891181249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:58,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-14 14:39:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541632288] [2024-10-14 14:39:58,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:58,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 14:39:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 14:39:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-14 14:39:58,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:39:58,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 745 transitions, 20640 flow. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 14:39:58,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:58,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:39:58,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:04,910 INFO L124 PetriNetUnfolderBase]: 12315/20085 cut-off events. [2024-10-14 14:40:04,910 INFO L125 PetriNetUnfolderBase]: For 1559580/1559580 co-relation queries the response was YES. [2024-10-14 14:40:05,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226228 conditions, 20085 events. 12315/20085 cut-off events. For 1559580/1559580 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 140205 event pairs, 608 based on Foata normal form. 71/20156 useless extension candidates. Maximal degree in co-relation 224302. Up to 6748 conditions per place. [2024-10-14 14:40:05,266 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 444 selfloop transitions, 883 changer transitions 86/1414 dead transitions. [2024-10-14 14:40:05,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1414 transitions, 39790 flow [2024-10-14 14:40:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:40:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:40:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 186 transitions. [2024-10-14 14:40:05,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4449760765550239 [2024-10-14 14:40:05,267 INFO L175 Difference]: Start difference. First operand has 333 places, 745 transitions, 20640 flow. Second operand 19 states and 186 transitions. [2024-10-14 14:40:05,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1414 transitions, 39790 flow [2024-10-14 14:40:21,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1414 transitions, 37817 flow, removed 594 selfloop flow, removed 15 redundant places. [2024-10-14 14:40:21,615 INFO L231 Difference]: Finished difference. Result has 345 places, 1128 transitions, 33558 flow [2024-10-14 14:40:21,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=19757, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=33558, PETRI_PLACES=345, PETRI_TRANSITIONS=1128} [2024-10-14 14:40:21,617 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 321 predicate places. [2024-10-14 14:40:21,617 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 1128 transitions, 33558 flow [2024-10-14 14:40:21,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 14:40:21,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:40:21,618 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:40:21,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-14 14:40:21,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:21,819 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:40:21,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:40:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1491771416, now seen corresponding path program 16 times [2024-10-14 14:40:21,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:40:21,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019924334] [2024-10-14 14:40:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:40:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:40:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:21,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:40:21,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019924334] [2024-10-14 14:40:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019924334] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:40:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999510305] [2024-10-14 14:40:21,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:40:21,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:40:21,892 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:40:21,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 14:40:21,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:40:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:40:21,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:40:21,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:40:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:21,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:40:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:22,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999510305] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:40:22,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:40:22,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-14 14:40:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009698028] [2024-10-14 14:40:22,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:40:22,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:40:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:40:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:40:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:40:22,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:40:22,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1128 transitions, 33558 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 14:40:22,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:40:22,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:40:22,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:31,087 INFO L124 PetriNetUnfolderBase]: 15400/24929 cut-off events. [2024-10-14 14:40:31,087 INFO L125 PetriNetUnfolderBase]: For 2088476/2088476 co-relation queries the response was YES. [2024-10-14 14:40:31,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289773 conditions, 24929 events. 15400/24929 cut-off events. For 2088476/2088476 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 176957 event pairs, 1247 based on Foata normal form. 58/24987 useless extension candidates. Maximal degree in co-relation 287830. Up to 5270 conditions per place. [2024-10-14 14:40:31,582 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 747 selfloop transitions, 773 changer transitions 10/1531 dead transitions. [2024-10-14 14:40:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1531 transitions, 45877 flow [2024-10-14 14:40:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 14:40:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 14:40:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 218 transitions. [2024-10-14 14:40:31,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2024-10-14 14:40:31,583 INFO L175 Difference]: Start difference. First operand has 345 places, 1128 transitions, 33558 flow. Second operand 21 states and 218 transitions. [2024-10-14 14:40:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1531 transitions, 45877 flow