./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --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/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:29:02,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:29:02,978 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:29:02,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:29:02,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:29:03,021 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:29:03,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:29:03,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:29:03,024 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:29:03,025 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:29:03,025 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:29:03,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:29:03,026 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:29:03,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:29:03,028 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:29:03,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:29:03,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:29:03,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:29:03,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:29:03,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:29:03,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:29:03,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:29:03,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:29:03,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:29:03,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:29:03,035 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:29:03,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:29:03,036 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:29:03,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:29:03,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:29:03,036 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:29:03,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:29:03,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:29:03,037 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:29:03,037 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:29:03,037 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:29:03,037 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:29:03,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:29:03,038 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:29:03,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:29:03,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:29:03,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:29:03,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2024-10-14 14:29:03,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:29:03,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:29:03,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:29:03,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:29:03,350 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:29:03,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-10-14 14:29:04,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:29:05,169 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:29:05,170 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2024-10-14 14:29:05,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11e02553b/f8a681874e9747cca49d14d1fafba654/FLAG4c4b6f75c [2024-10-14 14:29:05,452 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11e02553b/f8a681874e9747cca49d14d1fafba654 [2024-10-14 14:29:05,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:29:05,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:29:05,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:29:05,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:29:05,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:29:05,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:29:05" (1/1) ... [2024-10-14 14:29:05,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6238b004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:05, skipping insertion in model container [2024-10-14 14:29:05,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:29:05" (1/1) ... [2024-10-14 14:29:05,529 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:29:05,698 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/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-10-14 14:29:06,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:29:06,043 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:29:06,057 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/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-10-14 14:29:06,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:29:06,211 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:29:06,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06 WrapperNode [2024-10-14 14:29:06,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:29:06,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:29:06,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:29:06,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:29:06,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,276 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-10-14 14:29:06,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:29:06,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:29:06,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:29:06,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:29:06,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,295 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,322 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-10-14 14:29:06,323 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,338 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:29:06,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:29:06,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:29:06,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:29:06,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (1/1) ... [2024-10-14 14:29:06,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:29:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:06,409 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 14:29:06,412 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 14:29:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 14:29:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 14:29:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:29:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2024-10-14 14:29:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2024-10-14 14:29:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:29:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:29:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:29:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:29:06,482 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 14:29:06,646 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:29:06,648 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:29:06,813 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:29:06,813 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:29:06,944 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:29:06,944 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 14:29:06,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:29:06 BoogieIcfgContainer [2024-10-14 14:29:06,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:29:06,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:29:06,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:29:06,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:29:06,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:29:05" (1/3) ... [2024-10-14 14:29:06,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca61ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:29:06, skipping insertion in model container [2024-10-14 14:29:06,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:06" (2/3) ... [2024-10-14 14:29:06,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca61ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:29:06, skipping insertion in model container [2024-10-14 14:29:06,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:29:06" (3/3) ... [2024-10-14 14:29:06,960 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2024-10-14 14:29:06,980 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:29:06,981 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:29:06,982 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:29:07,027 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-14 14:29:07,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2024-10-14 14:29:07,084 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-10-14 14:29:07,085 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:29:07,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-14 14:29:07,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2024-10-14 14:29:07,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2024-10-14 14:29:07,100 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:29:07,107 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;@27740ed1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:29:07,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 14:29:07,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:29:07,117 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-14 14:29:07,118 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:29:07,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:07,119 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:07,119 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:07,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 314256426, now seen corresponding path program 1 times [2024-10-14 14:29:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:07,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594700119] [2024-10-14 14:29:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:07,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:07,383 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 14:29:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594700119] [2024-10-14 14:29:07,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594700119] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:29:07,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:29:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:29:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438935441] [2024-10-14 14:29:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:29:07,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:29:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:07,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:29:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:29:07,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-14 14:29:07,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:07,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-14 14:29:07,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:07,534 INFO L124 PetriNetUnfolderBase]: 61/134 cut-off events. [2024-10-14 14:29:07,536 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:29:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 134 events. 61/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 409 event pairs, 27 based on Foata normal form. 6/139 useless extension candidates. Maximal degree in co-relation 248. Up to 77 conditions per place. [2024-10-14 14:29:07,541 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-14 14:29:07,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2024-10-14 14:29:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:29:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:29:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-10-14 14:29:07,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 14:29:07,561 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2024-10-14 14:29:07,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2024-10-14 14:29:07,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:29:07,568 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2024-10-14 14:29:07,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2024-10-14 14:29:07,574 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2024-10-14 14:29:07,576 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2024-10-14 14:29:07,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:07,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:07,578 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:07,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:29:07,579 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:07,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1946104689, now seen corresponding path program 1 times [2024-10-14 14:29:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:07,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096325294] [2024-10-14 14:29:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:07,723 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 14:29:07,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096325294] [2024-10-14 14:29:07,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096325294] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:29:07,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:29:07,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:29:07,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90437087] [2024-10-14 14:29:07,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:29:07,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:29:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:29:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:29:07,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-14 14:29:07,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:29:07,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:07,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-14 14:29:07,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:07,841 INFO L124 PetriNetUnfolderBase]: 101/220 cut-off events. [2024-10-14 14:29:07,841 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-10-14 14:29:07,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 220 events. 101/220 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 762 event pairs, 53 based on Foata normal form. 10/230 useless extension candidates. Maximal degree in co-relation 144. Up to 125 conditions per place. [2024-10-14 14:29:07,844 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-10-14 14:29:07,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2024-10-14 14:29:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:29:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:29:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-10-14 14:29:07,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 14:29:07,846 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-10-14 14:29:07,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2024-10-14 14:29:07,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:29:07,848 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2024-10-14 14:29:07,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-10-14 14:29:07,849 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-10-14 14:29:07,850 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2024-10-14 14:29:07,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:29:07,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:07,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:07,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:29:07,851 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:07,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:07,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151760, now seen corresponding path program 1 times [2024-10-14 14:29:07,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:07,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040285376] [2024-10-14 14:29:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:07,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:29:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040285376] [2024-10-14 14:29:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040285376] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:29:08,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:29:08,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:29:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765916883] [2024-10-14 14:29:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:29:08,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:29:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:29:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:29:08,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-10-14 14:29:08,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 14:29:08,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:08,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-10-14 14:29:08,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:08,155 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2024-10-14 14:29:08,156 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-14 14:29:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 532 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 132. Up to 80 conditions per place. [2024-10-14 14:29:08,159 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-10-14 14:29:08,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2024-10-14 14:29:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:29:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:29:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-14 14:29:08,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-14 14:29:08,163 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-10-14 14:29:08,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2024-10-14 14:29:08,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:29:08,165 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2024-10-14 14:29:08,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-10-14 14:29:08,167 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2024-10-14 14:29:08,167 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2024-10-14 14:29:08,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 14:29:08,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:08,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:08,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:29:08,168 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:08,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1080335954, now seen corresponding path program 2 times [2024-10-14 14:29:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:08,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306119134] [2024-10-14 14:29:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:08,273 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 14:29:08,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306119134] [2024-10-14 14:29:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306119134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960270398] [2024-10-14 14:29:08,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:29:08,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:08,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:08,278 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 14:29:08,280 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 14:29:08,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:29:08,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:08,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:29:08,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:29:08,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:08,506 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 14:29:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960270398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:08,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:08,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-14 14:29:08,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477835203] [2024-10-14 14:29:08,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:08,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:29:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:29:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:29:08,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 14:29:08,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:08,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:08,796 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2024-10-14 14:29:08,798 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-10-14 14:29:08,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1288 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2024-10-14 14:29:08,803 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-10-14 14:29:08,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2024-10-14 14:29:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:29:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:29:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-14 14:29:08,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 14:29:08,806 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2024-10-14 14:29:08,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2024-10-14 14:29:08,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:29:08,810 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2024-10-14 14:29:08,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2024-10-14 14:29:08,812 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2024-10-14 14:29:08,812 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2024-10-14 14:29:08,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 14:29:08,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:08,813 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:08,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:29:09,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:09,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:09,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1211202341, now seen corresponding path program 3 times [2024-10-14 14:29:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:09,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887781574] [2024-10-14 14:29:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:29:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887781574] [2024-10-14 14:29:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887781574] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215903508] [2024-10-14 14:29:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:29:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:09,109 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 14:29:09,110 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 14:29:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:29:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:09,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:29:09,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:29:09,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:29:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215903508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:09,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-14 14:29:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33765009] [2024-10-14 14:29:09,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:09,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:29:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:29:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:29:09,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:09,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 14:29:09,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:09,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:09,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:09,416 INFO L124 PetriNetUnfolderBase]: 289/674 cut-off events. [2024-10-14 14:29:09,416 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2024-10-14 14:29:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 674 events. 289/674 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2894 event pairs, 28 based on Foata normal form. 57/731 useless extension candidates. Maximal degree in co-relation 1212. Up to 156 conditions per place. [2024-10-14 14:29:09,422 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-10-14 14:29:09,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2024-10-14 14:29:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:29:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:29:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-14 14:29:09,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 14:29:09,424 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2024-10-14 14:29:09,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2024-10-14 14:29:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-10-14 14:29:09,428 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2024-10-14 14:29:09,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-10-14 14:29:09,429 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-10-14 14:29:09,429 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2024-10-14 14:29:09,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 14:29:09,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:09,430 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 14:29:09,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:09,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:09,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 855375968, now seen corresponding path program 4 times [2024-10-14 14:29:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680265824] [2024-10-14 14:29:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 14:29:09,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680265824] [2024-10-14 14:29:09,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680265824] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277196325] [2024-10-14 14:29:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:29:09,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:09,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:09,784 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 14:29:09,786 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 14:29:09,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:29:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:09,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:29:09,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 14:29:09,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 14:29:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277196325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:10,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:10,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-14 14:29:10,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003924948] [2024-10-14 14:29:10,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:10,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:29:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:29:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:29:10,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:10,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:10,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:10,534 INFO L124 PetriNetUnfolderBase]: 642/1516 cut-off events. [2024-10-14 14:29:10,535 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-10-14 14:29:10,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 1516 events. 642/1516 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 6900 event pairs, 51 based on Foata normal form. 114/1630 useless extension candidates. Maximal degree in co-relation 3154. Up to 265 conditions per place. [2024-10-14 14:29:10,547 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 144 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2024-10-14 14:29:10,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 160 transitions, 1098 flow [2024-10-14 14:29:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:29:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:29:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-10-14 14:29:10,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-14 14:29:10,549 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 12 states and 189 transitions. [2024-10-14 14:29:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 160 transitions, 1098 flow [2024-10-14 14:29:10,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 160 transitions, 1078 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-14 14:29:10,559 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 226 flow [2024-10-14 14:29:10,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2024-10-14 14:29:10,560 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2024-10-14 14:29:10,560 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 226 flow [2024-10-14 14:29:10,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:10,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:10,560 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:10,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:29:10,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:10,765 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:10,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1064182416, now seen corresponding path program 5 times [2024-10-14 14:29:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403479298] [2024-10-14 14:29:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-14 14:29:10,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403479298] [2024-10-14 14:29:10,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403479298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492510891] [2024-10-14 14:29:10,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:29:10,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:10,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:10,988 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 14:29:10,989 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 14:29:11,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-10-14 14:29:11,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:11,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:29:11,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-14 14:29:11,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-14 14:29:11,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492510891] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:11,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:11,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-14 14:29:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050416408] [2024-10-14 14:29:11,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:11,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:29:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:29:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:29:11,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:11,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 226 flow. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 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 14:29:11,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:11,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:12,063 INFO L124 PetriNetUnfolderBase]: 1434/3383 cut-off events. [2024-10-14 14:29:12,064 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-10-14 14:29:12,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11992 conditions, 3383 events. 1434/3383 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18782 event pairs, 117 based on Foata normal form. 258/3641 useless extension candidates. Maximal degree in co-relation 9580. Up to 583 conditions per place. [2024-10-14 14:29:12,096 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 210 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-10-14 14:29:12,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 227 transitions, 2146 flow [2024-10-14 14:29:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:29:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:29:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-10-14 14:29:12,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-14 14:29:12,102 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 226 flow. Second operand 12 states and 189 transitions. [2024-10-14 14:29:12,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 227 transitions, 2146 flow [2024-10-14 14:29:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 227 transitions, 2080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 14:29:12,120 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 316 flow [2024-10-14 14:29:12,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=316, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2024-10-14 14:29:12,122 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 52 predicate places. [2024-10-14 14:29:12,124 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 316 flow [2024-10-14 14:29:12,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 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 14:29:12,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:12,125 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:12,144 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 14:29:12,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:12,326 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:12,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1757091020, now seen corresponding path program 6 times [2024-10-14 14:29:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574826327] [2024-10-14 14:29:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-14 14:29:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:12,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574826327] [2024-10-14 14:29:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574826327] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:12,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698342747] [2024-10-14 14:29:12,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:29:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:12,804 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 14:29:12,805 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 14:29:13,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-10-14 14:29:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:13,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 14:29:13,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-10-14 14:29:13,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-10-14 14:29:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698342747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:13,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:13,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-10-14 14:29:13,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113082423] [2024-10-14 14:29:13,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:13,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 14:29:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 14:29:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:29:13,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:13,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 316 flow. Second operand has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 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 14:29:13,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:13,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:13,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:23,481 INFO L124 PetriNetUnfolderBase]: 3231/7540 cut-off events. [2024-10-14 14:29:23,482 INFO L125 PetriNetUnfolderBase]: For 47002/47002 co-relation queries the response was YES. [2024-10-14 14:29:23,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30035 conditions, 7540 events. 3231/7540 cut-off events. For 47002/47002 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 45055 event pairs, 10 based on Foata normal form. 603/8143 useless extension candidates. Maximal degree in co-relation 20856. Up to 1339 conditions per place. [2024-10-14 14:29:23,552 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1774 selfloop transitions, 516 changer transitions 0/2295 dead transitions. [2024-10-14 14:29:23,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2295 transitions, 16226 flow [2024-10-14 14:29:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-10-14 14:29:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2024-10-14 14:29:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 3696 transitions. [2024-10-14 14:29:23,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-10-14 14:29:23,572 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 316 flow. Second operand 253 states and 3696 transitions. [2024-10-14 14:29:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2295 transitions, 16226 flow [2024-10-14 14:29:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2295 transitions, 16154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 14:29:23,646 INFO L231 Difference]: Finished difference. Result has 465 places, 557 transitions, 6998 flow [2024-10-14 14:29:23,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=6998, PETRI_PLACES=465, PETRI_TRANSITIONS=557} [2024-10-14 14:29:23,647 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2024-10-14 14:29:23,647 INFO L471 AbstractCegarLoop]: Abstraction has has 465 places, 557 transitions, 6998 flow [2024-10-14 14:29:23,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 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 14:29:23,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:23,648 INFO L204 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:23,666 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 14:29:23,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:23,848 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:23,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -14787069, now seen corresponding path program 7 times [2024-10-14 14:29:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:23,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421564069] [2024-10-14 14:29:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-14 14:29:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421564069] [2024-10-14 14:29:24,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421564069] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841762016] [2024-10-14 14:29:24,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:29:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:24,378 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 14:29:24,379 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 14:29:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:24,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 14:29:24,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-14 14:29:24,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-10-14 14:29:25,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841762016] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:25,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-10-14 14:29:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872778259] [2024-10-14 14:29:25,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:25,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 14:29:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 14:29:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-14 14:29:25,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-10-14 14:29:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 557 transitions, 6998 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:25,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-10-14 14:29:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:30,099 INFO L124 PetriNetUnfolderBase]: 5333/12525 cut-off events. [2024-10-14 14:29:30,099 INFO L125 PetriNetUnfolderBase]: For 1304784/1304784 co-relation queries the response was YES. [2024-10-14 14:29:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71347 conditions, 12525 events. 5333/12525 cut-off events. For 1304784/1304784 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 82568 event pairs, 306 based on Foata normal form. 747/13254 useless extension candidates. Maximal degree in co-relation 66323. Up to 2163 conditions per place. [2024-10-14 14:29:30,374 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1069 dead transitions. [2024-10-14 14:29:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1069 transitions, 19162 flow [2024-10-14 14:29:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 14:29:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 14:29:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 352 transitions. [2024-10-14 14:29:30,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-14 14:29:30,377 INFO L175 Difference]: Start difference. First operand has 465 places, 557 transitions, 6998 flow. Second operand 22 states and 352 transitions. [2024-10-14 14:29:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1069 transitions, 19162 flow [2024-10-14 14:29:34,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1069 transitions, 18406 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-10-14 14:29:34,204 INFO L231 Difference]: Finished difference. Result has 478 places, 726 transitions, 9756 flow [2024-10-14 14:29:34,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9756, PETRI_PLACES=478, PETRI_TRANSITIONS=726} [2024-10-14 14:29:34,206 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 456 predicate places. [2024-10-14 14:29:34,206 INFO L471 AbstractCegarLoop]: Abstraction has has 478 places, 726 transitions, 9756 flow [2024-10-14 14:29:34,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:29:34,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:29:34,206 INFO L204 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:29:34,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 14:29:34,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:34,407 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:29:34,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:29:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1208228154, now seen corresponding path program 8 times [2024-10-14 14:29:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:29:34,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191438623] [2024-10-14 14:29:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:29:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:29:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:29:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:29:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:29:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191438623] [2024-10-14 14:29:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191438623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:29:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356806602] [2024-10-14 14:29:37,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:29:37,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:29:37,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:29:37,592 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 14:29:37,593 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 14:29:37,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:29:37,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:29:37,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-10-14 14:29:37,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:29:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:29:38,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:29:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:29:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356806602] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:29:38,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:29:38,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2024-10-14 14:29:38,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273279734] [2024-10-14 14:29:38,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:29:38,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-14 14:29:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:29:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-14 14:29:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2024-10-14 14:29:38,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-10-14 14:29:38,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 726 transitions, 9756 flow. Second operand has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 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 14:29:38,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:29:38,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-10-14 14:29:38,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:29:58,424 INFO L124 PetriNetUnfolderBase]: 9445/25453 cut-off events. [2024-10-14 14:29:58,425 INFO L125 PetriNetUnfolderBase]: For 9243126/9243126 co-relation queries the response was YES. [2024-10-14 14:29:59,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280445 conditions, 25453 events. 9445/25453 cut-off events. For 9243126/9243126 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 212100 event pairs, 1275 based on Foata normal form. 1/25379 useless extension candidates. Maximal degree in co-relation 228414. Up to 4324 conditions per place. [2024-10-14 14:29:59,520 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2887 selfloop transitions, 83 changer transitions 2/2992 dead transitions. [2024-10-14 14:29:59,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2992 transitions, 49655 flow [2024-10-14 14:29:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-14 14:29:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-14 14:29:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2024-10-14 14:29:59,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-10-14 14:29:59,522 INFO L175 Difference]: Start difference. First operand has 478 places, 726 transitions, 9756 flow. Second operand 44 states and 644 transitions. [2024-10-14 14:29:59,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2992 transitions, 49655 flow