./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-ext/11_fmaxsymopt.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-ext/11_fmaxsymopt.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 6d4b02aa42f7b4e354f6555c82b5caeb47836d867813f6f1b24237fc4ad268ae --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:19:05,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:19:05,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:19:05,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:19:05,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:19:05,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:19:05,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:19:05,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:19:05,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:19:05,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:19:05,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:19:05,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:19:05,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:19:05,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:19:05,865 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:19:05,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:19:05,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:19:05,866 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:19:05,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:19:05,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:19:05,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:19:05,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:19:05,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:19:05,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:19:05,871 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:19:05,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:19:05,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:19:05,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:19:05,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:19:05,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:19:05,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:19:05,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:19:05,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:19:05,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:19:05,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:19:05,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:19:05,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:19:05,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:19:05,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:19:05,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:19:05,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:19:05,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:19:05,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d4b02aa42f7b4e354f6555c82b5caeb47836d867813f6f1b24237fc4ad268ae [2024-10-14 14:19:06,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:19:06,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:19:06,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:19:06,163 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:19:06,164 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:19:06,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-10-14 14:19:07,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:19:07,833 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:19:07,834 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-10-14 14:19:07,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5851ac7c/20c6089616f14189ba6379764eadb269/FLAGed1ed5ec4 [2024-10-14 14:19:07,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5851ac7c/20c6089616f14189ba6379764eadb269 [2024-10-14 14:19:07,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:19:07,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:19:07,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:19:07,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:19:07,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:19:07,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:19:07" (1/1) ... [2024-10-14 14:19:07,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5846a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:07, skipping insertion in model container [2024-10-14 14:19:07,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:19:07" (1/1) ... [2024-10-14 14:19:07,915 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:19:08,229 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-ext/11_fmaxsymopt.i[30570,30583] [2024-10-14 14:19:08,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:19:08,257 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:19:08,305 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-ext/11_fmaxsymopt.i[30570,30583] [2024-10-14 14:19:08,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:19:08,351 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:19:08,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08 WrapperNode [2024-10-14 14:19:08,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:19:08,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:19:08,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:19:08,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:19:08,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,395 INFO L138 Inliner]: procedures = 170, calls = 24, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 106 [2024-10-14 14:19:08,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:19:08,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:19:08,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:19:08,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:19:08,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,411 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,429 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6]. The 1 writes are split as follows [0, 1]. [2024-10-14 14:19:08,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:19:08,448 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:19:08,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:19:08,448 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:19:08,449 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (1/1) ... [2024-10-14 14:19:08,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:19:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:08,485 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 14:19:08,489 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 14:19:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:19:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:19:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-14 14:19:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-14 14:19:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:19:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:19:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:19:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:19:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:19:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:19:08,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:19:08,548 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 14:19:08,696 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:19:08,698 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:19:08,907 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:19:08,907 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:19:09,081 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:19:09,082 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:19:09,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:19:09 BoogieIcfgContainer [2024-10-14 14:19:09,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:19:09,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:19:09,084 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:19:09,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:19:09,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:19:07" (1/3) ... [2024-10-14 14:19:09,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a6934c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:19:09, skipping insertion in model container [2024-10-14 14:19:09,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:08" (2/3) ... [2024-10-14 14:19:09,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a6934c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:19:09, skipping insertion in model container [2024-10-14 14:19:09,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:19:09" (3/3) ... [2024-10-14 14:19:09,091 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2024-10-14 14:19:09,110 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:19:09,111 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:19:09,111 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:19:09,158 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:19:09,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 23 transitions, 50 flow [2024-10-14 14:19:09,220 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-10-14 14:19:09,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:19:09,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-14 14:19:09,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 23 transitions, 50 flow [2024-10-14 14:19:09,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 23 transitions, 50 flow [2024-10-14 14:19:09,237 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:19:09,243 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;@1b61af12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:19:09,244 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:19:09,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:19:09,267 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-10-14 14:19:09,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:19:09,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:09,268 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-14 14:19:09,269 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:19:09,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1300280328, now seen corresponding path program 1 times [2024-10-14 14:19:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643163351] [2024-10-14 14:19:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:09,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643163351] [2024-10-14 14:19:09,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643163351] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:09,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:09,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:19:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197537337] [2024-10-14 14:19:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:09,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:09,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-10-14 14:19:09,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 14:19:09,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:09,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-10-14 14:19:09,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:09,635 INFO L124 PetriNetUnfolderBase]: 25/69 cut-off events. [2024-10-14 14:19:09,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:19:09,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 69 events. 25/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 18 based on Foata normal form. 3/65 useless extension candidates. Maximal degree in co-relation 112. Up to 56 conditions per place. [2024-10-14 14:19:09,640 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 15 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-10-14 14:19:09,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 82 flow [2024-10-14 14:19:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2024-10-14 14:19:09,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-10-14 14:19:09,653 INFO L175 Difference]: Start difference. First operand has 22 places, 23 transitions, 50 flow. Second operand 3 states and 35 transitions. [2024-10-14 14:19:09,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 82 flow [2024-10-14 14:19:09,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:19:09,659 INFO L231 Difference]: Finished difference. Result has 24 places, 22 transitions, 58 flow [2024-10-14 14:19:09,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=58, PETRI_PLACES=24, PETRI_TRANSITIONS=22} [2024-10-14 14:19:09,668 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2024-10-14 14:19:09,669 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 22 transitions, 58 flow [2024-10-14 14:19:09,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 14:19:09,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:09,670 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:09,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:19:09,671 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:19:09,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2062893396, now seen corresponding path program 1 times [2024-10-14 14:19:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495988117] [2024-10-14 14:19:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:09,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495988117] [2024-10-14 14:19:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495988117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:09,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958132322] [2024-10-14 14:19:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:09,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:09,819 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 14:19:09,833 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 14:19:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:09,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:19:09,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:09,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958132322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:09,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:09,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 14:19:09,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380288033] [2024-10-14 14:19:09,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:09,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:19:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:19:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:19:09,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-10-14 14:19:09,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 14:19:09,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:09,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-10-14 14:19:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:10,085 INFO L124 PetriNetUnfolderBase]: 25/72 cut-off events. [2024-10-14 14:19:10,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:19:10,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 72 events. 25/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 18 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 134. Up to 56 conditions per place. [2024-10-14 14:19:10,087 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 15 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2024-10-14 14:19:10,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 110 flow [2024-10-14 14:19:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:19:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:19:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 53 transitions. [2024-10-14 14:19:10,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38405797101449274 [2024-10-14 14:19:10,089 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 58 flow. Second operand 6 states and 53 transitions. [2024-10-14 14:19:10,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 110 flow [2024-10-14 14:19:10,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 106 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:10,091 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 90 flow [2024-10-14 14:19:10,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-10-14 14:19:10,092 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2024-10-14 14:19:10,092 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 90 flow [2024-10-14 14:19:10,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 14:19:10,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:10,093 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-14 14:19:10,112 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 14:19:10,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:10,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:19:10,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 452969208, now seen corresponding path program 2 times [2024-10-14 14:19:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120058232] [2024-10-14 14:19:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:10,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:10,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120058232] [2024-10-14 14:19:10,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120058232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337189132] [2024-10-14 14:19:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:19:10,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:10,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:10,462 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 14:19:10,463 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 14:19:10,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:19:10,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:19:10,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:19:10,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:10,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:19:10,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337189132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:10,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:10,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-14 14:19:10,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809376493] [2024-10-14 14:19:10,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:10,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:19:10,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:19:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:19:10,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-10-14 14:19:10,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 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 14:19:10,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:10,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-10-14 14:19:10,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:10,721 INFO L124 PetriNetUnfolderBase]: 25/74 cut-off events. [2024-10-14 14:19:10,722 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 14:19:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 74 events. 25/74 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 18 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 125. Up to 56 conditions per place. [2024-10-14 14:19:10,724 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 15 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2024-10-14 14:19:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 27 transitions, 146 flow [2024-10-14 14:19:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:19:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:19:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 64 transitions. [2024-10-14 14:19:10,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-10-14 14:19:10,728 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 90 flow. Second operand 8 states and 64 transitions. [2024-10-14 14:19:10,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 27 transitions, 146 flow [2024-10-14 14:19:10,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 132 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:10,732 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 112 flow [2024-10-14 14:19:10,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-10-14 14:19:10,733 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2024-10-14 14:19:10,734 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 112 flow [2024-10-14 14:19:10,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 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 14:19:10,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:10,734 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-14 14:19:10,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:19:10,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-14 14:19:10,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 14:19:10,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 192720504, now seen corresponding path program 3 times [2024-10-14 14:19:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:10,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6184627] [2024-10-14 14:19:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:10,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:10,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:19:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:11,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:19:11,020 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:19:11,021 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-14 14:19:11,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-14 14:19:11,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-14 14:19:11,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:19:11,024 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-14 14:19:11,027 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:19:11,027 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 14:19:11,086 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:19:11,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 39 transitions, 88 flow [2024-10-14 14:19:11,097 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2024-10-14 14:19:11,098 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:19:11,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 7/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 101 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-10-14 14:19:11,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 39 transitions, 88 flow [2024-10-14 14:19:11,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 39 transitions, 88 flow [2024-10-14 14:19:11,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:19:11,103 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;@1b61af12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:19:11,103 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:19:11,109 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:19:11,109 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-14 14:19:11,109 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:19:11,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:11,110 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:11,110 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:19:11,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash -982383914, now seen corresponding path program 1 times [2024-10-14 14:19:11,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:11,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741352138] [2024-10-14 14:19:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:11,147 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 14:19:11,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:11,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741352138] [2024-10-14 14:19:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741352138] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:11,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:11,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:19:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550746727] [2024-10-14 14:19:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:11,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:11,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-10-14 14:19:11,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 14:19:11,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:11,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-10-14 14:19:11,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:11,345 INFO L124 PetriNetUnfolderBase]: 553/1026 cut-off events. [2024-10-14 14:19:11,346 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-14 14:19:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 1026 events. 553/1026 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4732 event pairs, 468 based on Foata normal form. 95/1006 useless extension candidates. Maximal degree in co-relation 1168. Up to 866 conditions per place. [2024-10-14 14:19:11,356 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 26 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-14 14:19:11,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 140 flow [2024-10-14 14:19:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-10-14 14:19:11,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-10-14 14:19:11,358 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 88 flow. Second operand 3 states and 59 transitions. [2024-10-14 14:19:11,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 140 flow [2024-10-14 14:19:11,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:19:11,360 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 94 flow [2024-10-14 14:19:11,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-10-14 14:19:11,361 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2024-10-14 14:19:11,361 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 94 flow [2024-10-14 14:19:11,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 14:19:11,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:11,361 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:11,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:19:11,362 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:19:11,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1574460895, now seen corresponding path program 1 times [2024-10-14 14:19:11,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:11,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167291913] [2024-10-14 14:19:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167291913] [2024-10-14 14:19:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167291913] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585380445] [2024-10-14 14:19:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:11,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:11,416 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 14:19:11,417 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 14:19:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:11,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:19:11,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:11,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:11,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585380445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:11,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:11,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 14:19:11,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262385901] [2024-10-14 14:19:11,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:11,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:19:11,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:19:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:19:11,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-10-14 14:19:11,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 14:19:11,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:11,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-10-14 14:19:11,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:11,719 INFO L124 PetriNetUnfolderBase]: 553/1029 cut-off events. [2024-10-14 14:19:11,721 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-14 14:19:11,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 1029 events. 553/1029 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4732 event pairs, 468 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1931. Up to 866 conditions per place. [2024-10-14 14:19:11,728 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 26 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-10-14 14:19:11,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 168 flow [2024-10-14 14:19:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:19:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:19:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-10-14 14:19:11,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-10-14 14:19:11,731 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 94 flow. Second operand 6 states and 88 transitions. [2024-10-14 14:19:11,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 168 flow [2024-10-14 14:19:11,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:11,733 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 126 flow [2024-10-14 14:19:11,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-10-14 14:19:11,734 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-10-14 14:19:11,734 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 126 flow [2024-10-14 14:19:11,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 14:19:11,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:11,735 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:11,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:19:11,935 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 14:19:11,936 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:19:11,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 361037206, now seen corresponding path program 2 times [2024-10-14 14:19:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:11,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447954258] [2024-10-14 14:19:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:12,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:12,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447954258] [2024-10-14 14:19:12,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447954258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:12,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795439271] [2024-10-14 14:19:12,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:19:12,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:12,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:12,028 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 14:19:12,029 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 14:19:12,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:19:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:19:12,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 14:19:12,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:19:12,114 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:19:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795439271] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:12,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:19:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-14 14:19:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056148960] [2024-10-14 14:19:12,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:12,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:19:12,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-10-14 14:19:12,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 14:19:12,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:12,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-10-14 14:19:12,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:12,340 INFO L124 PetriNetUnfolderBase]: 951/1747 cut-off events. [2024-10-14 14:19:12,340 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-10-14 14:19:12,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3331 conditions, 1747 events. 951/1747 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9306 event pairs, 418 based on Foata normal form. 0/1549 useless extension candidates. Maximal degree in co-relation 3296. Up to 784 conditions per place. [2024-10-14 14:19:12,356 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-10-14 14:19:12,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 275 flow [2024-10-14 14:19:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-10-14 14:19:12,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-10-14 14:19:12,358 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 126 flow. Second operand 3 states and 73 transitions. [2024-10-14 14:19:12,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 275 flow [2024-10-14 14:19:12,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 261 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:12,360 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 126 flow [2024-10-14 14:19:12,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-10-14 14:19:12,361 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-10-14 14:19:12,361 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 126 flow [2024-10-14 14:19:12,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 14:19:12,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:12,362 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-14 14:19:12,380 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 14:19:12,562 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 14:19:12,563 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:19:12,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1858755249, now seen corresponding path program 1 times [2024-10-14 14:19:12,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:12,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881374576] [2024-10-14 14:19:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:19:12,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881374576] [2024-10-14 14:19:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881374576] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410446998] [2024-10-14 14:19:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:12,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:12,665 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 14:19:12,667 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 14:19:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:12,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:19:12,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:19:12,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 14:19:12,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410446998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:12,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:12,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-14 14:19:12,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357124538] [2024-10-14 14:19:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:12,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:19:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:19:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:19:12,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-10-14 14:19:12,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 14:19:12,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:12,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-10-14 14:19:12,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:13,009 INFO L124 PetriNetUnfolderBase]: 966/1792 cut-off events. [2024-10-14 14:19:13,010 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-10-14 14:19:13,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 1792 events. 966/1792 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9539 event pairs, 818 based on Foata normal form. 2/1650 useless extension candidates. Maximal degree in co-relation 3537. Up to 1501 conditions per place. [2024-10-14 14:19:13,024 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 28 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-10-14 14:19:13,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 43 transitions, 208 flow [2024-10-14 14:19:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:19:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:19:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-10-14 14:19:13,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34294871794871795 [2024-10-14 14:19:13,026 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 126 flow. Second operand 8 states and 107 transitions. [2024-10-14 14:19:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 43 transitions, 208 flow [2024-10-14 14:19:13,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 43 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:19:13,029 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 158 flow [2024-10-14 14:19:13,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-10-14 14:19:13,030 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2024-10-14 14:19:13,030 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 158 flow [2024-10-14 14:19:13,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 14:19:13,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:13,031 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-14 14:19:13,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 14:19:13,231 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 14:19:13,232 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-14 14:19:13,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2012022447, now seen corresponding path program 2 times [2024-10-14 14:19:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213573457] [2024-10-14 14:19:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:13,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:19:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:13,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:19:13,294 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:19:13,294 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-14 14:19:13,294 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-14 14:19:13,294 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-14 14:19:13,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-14 14:19:13,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 14:19:13,295 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-14 14:19:13,296 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:19:13,296 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 14:19:13,322 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:19:13,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 55 transitions, 128 flow [2024-10-14 14:19:13,338 INFO L124 PetriNetUnfolderBase]: 10/63 cut-off events. [2024-10-14 14:19:13,338 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-14 14:19:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 63 events. 10/63 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-10-14 14:19:13,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 55 transitions, 128 flow [2024-10-14 14:19:13,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 55 transitions, 128 flow [2024-10-14 14:19:13,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:19:13,343 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;@1b61af12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:19:13,343 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-14 14:19:13,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:19:13,346 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-14 14:19:13,346 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:19:13,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:13,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:13,347 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:13,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash -703058203, now seen corresponding path program 1 times [2024-10-14 14:19:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:13,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488959781] [2024-10-14 14:19:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:13,375 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 14:19:13,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:13,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488959781] [2024-10-14 14:19:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488959781] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:13,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:19:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9476683] [2024-10-14 14:19:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:13,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:13,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-10-14 14:19:13,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 14:19:13,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:13,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-10-14 14:19:13,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:14,441 INFO L124 PetriNetUnfolderBase]: 8815/13572 cut-off events. [2024-10-14 14:19:14,442 INFO L125 PetriNetUnfolderBase]: For 700/700 co-relation queries the response was YES. [2024-10-14 14:19:14,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25975 conditions, 13572 events. 8815/13572 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 81305 event pairs, 7668 based on Foata normal form. 1610/13657 useless extension candidates. Maximal degree in co-relation 5896. Up to 11966 conditions per place. [2024-10-14 14:19:14,532 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 37 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-14 14:19:14,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 200 flow [2024-10-14 14:19:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-10-14 14:19:14,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-10-14 14:19:14,535 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 128 flow. Second operand 3 states and 83 transitions. [2024-10-14 14:19:14,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 200 flow [2024-10-14 14:19:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-14 14:19:14,538 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 130 flow [2024-10-14 14:19:14,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-10-14 14:19:14,540 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-10-14 14:19:14,541 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 130 flow [2024-10-14 14:19:14,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 14:19:14,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:14,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:14,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 14:19:14,544 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:14,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1920882841, now seen corresponding path program 1 times [2024-10-14 14:19:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:14,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687017878] [2024-10-14 14:19:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:14,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687017878] [2024-10-14 14:19:14,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687017878] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552524462] [2024-10-14 14:19:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:14,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:14,584 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 14:19:14,585 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 14:19:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:14,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:19:14,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:14,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552524462] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:14,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 14:19:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908462451] [2024-10-14 14:19:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:14,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:19:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:19:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:19:14,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-10-14 14:19:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-10-14 14:19:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:15,962 INFO L124 PetriNetUnfolderBase]: 8815/13575 cut-off events. [2024-10-14 14:19:15,963 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2024-10-14 14:19:15,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25891 conditions, 13575 events. 8815/13575 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 81278 event pairs, 7668 based on Foata normal form. 0/12050 useless extension candidates. Maximal degree in co-relation 25877. Up to 11966 conditions per place. [2024-10-14 14:19:16,048 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 37 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-10-14 14:19:16,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 226 flow [2024-10-14 14:19:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:19:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:19:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-10-14 14:19:16,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-10-14 14:19:16,049 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 130 flow. Second operand 6 states and 123 transitions. [2024-10-14 14:19:16,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 226 flow [2024-10-14 14:19:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:16,051 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 162 flow [2024-10-14 14:19:16,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-10-14 14:19:16,054 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-10-14 14:19:16,056 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 162 flow [2024-10-14 14:19:16,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:16,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:16,056 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:16,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:19:16,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:16,258 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:16,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash 552812389, now seen corresponding path program 2 times [2024-10-14 14:19:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:16,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028140923] [2024-10-14 14:19:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:19:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028140923] [2024-10-14 14:19:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028140923] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:16,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:16,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:19:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306699057] [2024-10-14 14:19:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:16,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:16,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-10-14 14:19:16,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:16,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:16,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-10-14 14:19:16,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:18,092 INFO L124 PetriNetUnfolderBase]: 15165/23116 cut-off events. [2024-10-14 14:19:18,093 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2024-10-14 14:19:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44381 conditions, 23116 events. 15165/23116 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 151294 event pairs, 6868 based on Foata normal form. 0/20536 useless extension candidates. Maximal degree in co-relation 44345. Up to 10774 conditions per place. [2024-10-14 14:19:18,258 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 72 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-10-14 14:19:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 382 flow [2024-10-14 14:19:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-14 14:19:18,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6484848484848484 [2024-10-14 14:19:18,260 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 162 flow. Second operand 3 states and 107 transitions. [2024-10-14 14:19:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 382 flow [2024-10-14 14:19:18,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 368 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:18,263 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 162 flow [2024-10-14 14:19:18,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-10-14 14:19:18,265 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-10-14 14:19:18,266 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 162 flow [2024-10-14 14:19:18,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:18,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:18,266 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:18,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 14:19:18,267 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:18,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash -903534563, now seen corresponding path program 1 times [2024-10-14 14:19:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:18,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252495090] [2024-10-14 14:19:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 14:19:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252495090] [2024-10-14 14:19:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252495090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:19:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933064991] [2024-10-14 14:19:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:18,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:18,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-10-14 14:19:18,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 14:19:18,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:18,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-10-14 14:19:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:21,198 INFO L124 PetriNetUnfolderBase]: 26272/39836 cut-off events. [2024-10-14 14:19:21,198 INFO L125 PetriNetUnfolderBase]: For 5442/5442 co-relation queries the response was YES. [2024-10-14 14:19:21,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79790 conditions, 39836 events. 26272/39836 cut-off events. For 5442/5442 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 277970 event pairs, 11890 based on Foata normal form. 0/36383 useless extension candidates. Maximal degree in co-relation 79759. Up to 18619 conditions per place. [2024-10-14 14:19:21,459 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 75 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2024-10-14 14:19:21,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 397 flow [2024-10-14 14:19:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-14 14:19:21,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6424242424242425 [2024-10-14 14:19:21,461 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 162 flow. Second operand 3 states and 106 transitions. [2024-10-14 14:19:21,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 397 flow [2024-10-14 14:19:21,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:19:21,480 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 172 flow [2024-10-14 14:19:21,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-10-14 14:19:21,485 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-10-14 14:19:21,485 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 172 flow [2024-10-14 14:19:21,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 14:19:21,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:21,485 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:21,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 14:19:21,485 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:21,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1225656256, now seen corresponding path program 1 times [2024-10-14 14:19:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472011337] [2024-10-14 14:19:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:19:21,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472011337] [2024-10-14 14:19:21,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472011337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:21,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:21,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:19:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343091000] [2024-10-14 14:19:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:21,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:21,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:21,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:21,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-10-14 14:19:21,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 14:19:21,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:21,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-10-14 14:19:21,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:23,447 INFO L124 PetriNetUnfolderBase]: 18188/28196 cut-off events. [2024-10-14 14:19:23,447 INFO L125 PetriNetUnfolderBase]: For 4576/4576 co-relation queries the response was YES. [2024-10-14 14:19:23,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57691 conditions, 28196 events. 18188/28196 cut-off events. For 4576/4576 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 193330 event pairs, 12332 based on Foata normal form. 564/26927 useless extension candidates. Maximal degree in co-relation 57659. Up to 20630 conditions per place. [2024-10-14 14:19:23,623 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 70 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-10-14 14:19:23,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 388 flow [2024-10-14 14:19:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-14 14:19:23,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6303030303030303 [2024-10-14 14:19:23,625 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 172 flow. Second operand 3 states and 104 transitions. [2024-10-14 14:19:23,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 388 flow [2024-10-14 14:19:23,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:19:23,691 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 176 flow [2024-10-14 14:19:23,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2024-10-14 14:19:23,694 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-10-14 14:19:23,694 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 176 flow [2024-10-14 14:19:23,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 14:19:23,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:23,694 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:23,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 14:19:23,695 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:23,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2079753419, now seen corresponding path program 1 times [2024-10-14 14:19:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16648782] [2024-10-14 14:19:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:19:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16648782] [2024-10-14 14:19:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16648782] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723557673] [2024-10-14 14:19:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:23,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:23,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:23,766 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 14:19:23,768 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 14:19:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:23,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:19:23,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:19:23,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:19:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723557673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:23,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-14 14:19:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755319746] [2024-10-14 14:19:23,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:23,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:19:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:19:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:19:23,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-10-14 14:19:23,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 176 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 14:19:23,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:23,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-10-14 14:19:23,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:26,280 INFO L124 PetriNetUnfolderBase]: 18248/28518 cut-off events. [2024-10-14 14:19:26,280 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2024-10-14 14:19:26,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60048 conditions, 28518 events. 18248/28518 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 195335 event pairs, 16009 based on Foata normal form. 2/26585 useless extension candidates. Maximal degree in co-relation 60007. Up to 24750 conditions per place. [2024-10-14 14:19:26,431 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 41 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-14 14:19:26,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 284 flow [2024-10-14 14:19:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:19:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:19:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-10-14 14:19:26,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-10-14 14:19:26,433 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 176 flow. Second operand 8 states and 150 transitions. [2024-10-14 14:19:26,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 284 flow [2024-10-14 14:19:26,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 59 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:26,472 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 210 flow [2024-10-14 14:19:26,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-10-14 14:19:26,473 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-10-14 14:19:26,473 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 210 flow [2024-10-14 14:19:26,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 14:19:26,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:26,473 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:26,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 14:19:26,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:26,674 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-14 14:19:26,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1524059403, now seen corresponding path program 2 times [2024-10-14 14:19:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:26,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643643901] [2024-10-14 14:19:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:26,692 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:19:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:19:26,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:19:26,712 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:19:26,712 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-14 14:19:26,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-14 14:19:26,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-14 14:19:26,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-14 14:19:26,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-14 14:19:26,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 14:19:26,713 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-14 14:19:26,715 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:19:26,715 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-14 14:19:26,756 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:19:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 170 flow [2024-10-14 14:19:26,767 INFO L124 PetriNetUnfolderBase]: 13/82 cut-off events. [2024-10-14 14:19:26,767 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-14 14:19:26,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 82 events. 13/82 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2024-10-14 14:19:26,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 170 flow [2024-10-14 14:19:26,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 71 transitions, 170 flow [2024-10-14 14:19:26,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:19:26,772 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;@1b61af12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:19:26,773 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-14 14:19:26,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:19:26,775 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-14 14:19:26,775 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:19:26,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:26,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:26,776 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:19:26,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -814584140, now seen corresponding path program 1 times [2024-10-14 14:19:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27411252] [2024-10-14 14:19:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:26,803 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 14:19:26,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27411252] [2024-10-14 14:19:26,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27411252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:26,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:19:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:19:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079530602] [2024-10-14 14:19:26,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:26,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:19:26,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 71 [2024-10-14 14:19:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 71 [2024-10-14 14:19:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:38,065 INFO L124 PetriNetUnfolderBase]: 121435/168971 cut-off events. [2024-10-14 14:19:38,065 INFO L125 PetriNetUnfolderBase]: For 12016/12016 co-relation queries the response was YES. [2024-10-14 14:19:38,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327375 conditions, 168971 events. 121435/168971 cut-off events. For 12016/12016 co-relation queries the response was YES. Maximal size of possible extension queue 3686. Compared 1155694 event pairs, 106668 based on Foata normal form. 22769/173133 useless extension candidates. Maximal degree in co-relation 26075. Up to 152966 conditions per place. [2024-10-14 14:19:39,083 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 48 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-10-14 14:19:39,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 262 flow [2024-10-14 14:19:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:19:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:19:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-14 14:19:39,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5023474178403756 [2024-10-14 14:19:39,084 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 170 flow. Second operand 3 states and 107 transitions. [2024-10-14 14:19:39,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 262 flow [2024-10-14 14:19:39,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 256 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-14 14:19:39,092 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 166 flow [2024-10-14 14:19:39,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-10-14 14:19:39,092 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2024-10-14 14:19:39,093 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 166 flow [2024-10-14 14:19:39,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:19:39,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:39,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:39,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-14 14:19:39,093 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:19:39,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:39,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1512656771, now seen corresponding path program 1 times [2024-10-14 14:19:39,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:39,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575741023] [2024-10-14 14:19:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:39,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575741023] [2024-10-14 14:19:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575741023] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573868212] [2024-10-14 14:19:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:39,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:19:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:19:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:39,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:19:39,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:39,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:19:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:39,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573868212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:19:39,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:19:39,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 14:19:39,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492926036] [2024-10-14 14:19:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:19:39,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:19:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:19:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:19:39,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 71 [2024-10-14 14:19:39,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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 14:19:39,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:39,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 71 [2024-10-14 14:19:39,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:19:49,795 INFO L124 PetriNetUnfolderBase]: 121435/168974 cut-off events. [2024-10-14 14:19:49,795 INFO L125 PetriNetUnfolderBase]: For 4776/4776 co-relation queries the response was YES. [2024-10-14 14:19:50,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325291 conditions, 168974 events. 121435/168974 cut-off events. For 4776/4776 co-relation queries the response was YES. Maximal size of possible extension queue 3686. Compared 1155609 event pairs, 106668 based on Foata normal form. 0/150367 useless extension candidates. Maximal degree in co-relation 325276. Up to 152966 conditions per place. [2024-10-14 14:19:51,125 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 48 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-10-14 14:19:51,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 284 flow [2024-10-14 14:19:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:19:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:19:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-10-14 14:19:51,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37089201877934275 [2024-10-14 14:19:51,127 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 166 flow. Second operand 6 states and 158 transitions. [2024-10-14 14:19:51,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 284 flow [2024-10-14 14:19:51,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 280 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:19:51,138 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 198 flow [2024-10-14 14:19:51,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-10-14 14:19:51,138 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-10-14 14:19:51,139 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 198 flow [2024-10-14 14:19:51,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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 14:19:51,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:19:51,139 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:19:51,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 14:19:51,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 14:19:51,340 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:19:51,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:19:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1733892340, now seen corresponding path program 2 times [2024-10-14 14:19:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:19:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845328985] [2024-10-14 14:19:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:19:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:19:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:19:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:19:51,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:19:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845328985] [2024-10-14 14:19:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845328985] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:19:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808515576] [2024-10-14 14:19:51,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:19:51,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:19:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:19:51,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:19:51,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:19:51,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:19:51,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:19:51,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 14:19:51,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:19:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:19:51,536 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:19:51,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808515576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:19:51,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:19:51,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-14 14:19:51,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015480019] [2024-10-14 14:19:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:19:51,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:19:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:19:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:19:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:19:51,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 71 [2024-10-14 14:19:51,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 14:19:51,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:19:51,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 71 [2024-10-14 14:19:51,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand