./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/dekker.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-atomic/dekker.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 07d1abd007d632a3b4dac260b28d2ba8a005f15955283342b1ec38e7417e11f4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:02:53,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:02:53,186 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:02:53,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:02:53,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:02:53,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:02:53,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:02:53,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:02:53,227 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:02:53,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:02:53,229 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:02:53,229 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:02:53,230 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:02:53,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:02:53,230 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:02:53,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:02:53,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:02:53,234 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:02:53,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:02:53,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:02:53,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:02:53,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:02:53,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:02:53,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:02:53,236 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:02:53,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:02:53,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:02:53,237 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:02:53,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:02:53,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:02:53,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:02:53,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:02:53,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:02:53,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:02:53,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:02:53,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:02:53,250 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:02:53,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:02:53,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:02:53,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:02:53,251 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:02:53,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:02:53,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d1abd007d632a3b4dac260b28d2ba8a005f15955283342b1ec38e7417e11f4 [2024-11-12 08:02:53,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:02:53,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:02:53,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:02:53,536 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:02:53,536 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:02:53,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/dekker.i [2024-11-12 08:02:54,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:02:55,259 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:02:55,260 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/dekker.i [2024-11-12 08:02:55,279 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/474c9775c/54d6af78d16a42479420f87484925eca/FLAGb4dcca984 [2024-11-12 08:02:55,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/474c9775c/54d6af78d16a42479420f87484925eca [2024-11-12 08:02:55,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:02:55,298 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:02:55,300 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:02:55,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:02:55,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:02:55,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b31caac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55, skipping insertion in model container [2024-11-12 08:02:55,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,350 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:02:55,714 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/dekker.i[32914,32927] [2024-11-12 08:02:55,723 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/dekker.i[33150,33163] [2024-11-12 08:02:55,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:02:55,737 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:02:55,794 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/dekker.i[32914,32927] [2024-11-12 08:02:55,797 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/dekker.i[33150,33163] [2024-11-12 08:02:55,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:02:55,845 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:02:55,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55 WrapperNode [2024-11-12 08:02:55,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:02:55,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:02:55,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:02:55,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:02:55,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,885 INFO L138 Inliner]: procedures = 167, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2024-11-12 08:02:55,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:02:55,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:02:55,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:02:55,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:02:55,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,916 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-12 08:02:55,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:02:55,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:02:55,946 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:02:55,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:02:55,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (1/1) ... [2024-11-12 08:02:55,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:02:55,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:55,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:02:55,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 08:02:56,036 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-11-12 08:02:56,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-11-12 08:02:56,036 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-12 08:02:56,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-12 08:02:56,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:02:56,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:02:56,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:02:56,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:02:56,038 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:02:56,158 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:02:56,160 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:02:56,295 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:02:56,295 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:02:56,373 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:02:56,373 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 08:02:56,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:02:56 BoogieIcfgContainer [2024-11-12 08:02:56,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:02:56,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:02:56,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:02:56,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:02:56,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:02:55" (1/3) ... [2024-11-12 08:02:56,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ca16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:02:56, skipping insertion in model container [2024-11-12 08:02:56,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:55" (2/3) ... [2024-11-12 08:02:56,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ca16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:02:56, skipping insertion in model container [2024-11-12 08:02:56,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:02:56" (3/3) ... [2024-11-12 08:02:56,384 INFO L112 eAbstractionObserver]: Analyzing ICFG dekker.i [2024-11-12 08:02:56,402 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:02:56,403 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-12 08:02:56,404 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:02:56,462 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:02:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 44 transitions, 102 flow [2024-11-12 08:02:56,515 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2024-11-12 08:02:56,515 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:02:56,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 8/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2024-11-12 08:02:56,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 44 transitions, 102 flow [2024-11-12 08:02:56,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 40 transitions, 89 flow [2024-11-12 08:02:56,531 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:02:56,537 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;@5e6883ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:02:56,538 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-12 08:02:56,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:02:56,545 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-11-12 08:02:56,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 08:02:56,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:56,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:56,547 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-12 08:02:56,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1944882347, now seen corresponding path program 1 times [2024-11-12 08:02:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266315632] [2024-11-12 08:02:56,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:56,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:56,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266315632] [2024-11-12 08:02:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266315632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:56,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:56,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872592801] [2024-11-12 08:02:56,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:56,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:02:56,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:02:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:02:56,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 44 [2024-11-12 08:02:56,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:56,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:56,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 44 [2024-11-12 08:02:56,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:56,938 INFO L124 PetriNetUnfolderBase]: 80/234 cut-off events. [2024-11-12 08:02:56,938 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-12 08:02:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 234 events. 80/234 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1296 event pairs, 30 based on Foata normal form. 39/246 useless extension candidates. Maximal degree in co-relation 348. Up to 73 conditions per place. [2024-11-12 08:02:56,943 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 16 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2024-11-12 08:02:56,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 140 flow [2024-11-12 08:02:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:02:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:02:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-12 08:02:56,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7803030303030303 [2024-11-12 08:02:56,958 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 89 flow. Second operand 3 states and 103 transitions. [2024-11-12 08:02:56,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 140 flow [2024-11-12 08:02:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 08:02:56,965 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 100 flow [2024-11-12 08:02:56,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-12 08:02:56,972 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-11-12 08:02:56,973 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 100 flow [2024-11-12 08:02:56,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:56,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:56,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:56,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:02:56,976 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-12 08:02:56,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash -981746950, now seen corresponding path program 1 times [2024-11-12 08:02:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:56,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497264355] [2024-11-12 08:02:56,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:57,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497264355] [2024-11-12 08:02:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497264355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:57,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:57,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:57,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393035679] [2024-11-12 08:02:57,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:57,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:02:57,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:02:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:02:57,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 44 [2024-11-12 08:02:57,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 44 [2024-11-12 08:02:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:57,167 INFO L124 PetriNetUnfolderBase]: 84/258 cut-off events. [2024-11-12 08:02:57,167 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-12 08:02:57,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 258 events. 84/258 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1470 event pairs, 45 based on Foata normal form. 15/251 useless extension candidates. Maximal degree in co-relation 209. Up to 112 conditions per place. [2024-11-12 08:02:57,174 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 15 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2024-11-12 08:02:57,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 151 flow [2024-11-12 08:02:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:02:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:02:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-12 08:02:57,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-11-12 08:02:57,178 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 100 flow. Second operand 3 states and 100 transitions. [2024-11-12 08:02:57,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 151 flow [2024-11-12 08:02:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:02:57,181 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 104 flow [2024-11-12 08:02:57,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-12 08:02:57,183 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-11-12 08:02:57,184 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 104 flow [2024-11-12 08:02:57,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:57,185 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:57,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:02:57,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-12 08:02:57,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2027059715, now seen corresponding path program 1 times [2024-11-12 08:02:57,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:57,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889393333] [2024-11-12 08:02:57,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:57,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889393333] [2024-11-12 08:02:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889393333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:57,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:57,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084193365] [2024-11-12 08:02:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:57,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:02:57,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:57,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:02:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:02:57,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 44 [2024-11-12 08:02:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:57,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 44 [2024-11-12 08:02:57,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:57,330 INFO L124 PetriNetUnfolderBase]: 136/305 cut-off events. [2024-11-12 08:02:57,330 INFO L125 PetriNetUnfolderBase]: For 198/202 co-relation queries the response was YES. [2024-11-12 08:02:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 305 events. 136/305 cut-off events. For 198/202 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1450 event pairs, 49 based on Foata normal form. 10/270 useless extension candidates. Maximal degree in co-relation 373. Up to 150 conditions per place. [2024-11-12 08:02:57,335 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 18 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-11-12 08:02:57,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 154 flow [2024-11-12 08:02:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:02:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:02:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-12 08:02:57,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7121212121212122 [2024-11-12 08:02:57,339 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 104 flow. Second operand 3 states and 94 transitions. [2024-11-12 08:02:57,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 154 flow [2024-11-12 08:02:57,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:57,343 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 110 flow [2024-11-12 08:02:57,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-12 08:02:57,344 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-11-12 08:02:57,344 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 110 flow [2024-11-12 08:02:57,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:57,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:57,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 08:02:57,346 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-12 08:02:57,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1514567007, now seen corresponding path program 1 times [2024-11-12 08:02:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114153886] [2024-11-12 08:02:57,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:57,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:57,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114153886] [2024-11-12 08:02:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114153886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:57,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:57,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348757026] [2024-11-12 08:02:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:57,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:02:57,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:57,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:02:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:02:57,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 44 [2024-11-12 08:02:57,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:57,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 44 [2024-11-12 08:02:57,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:57,492 INFO L124 PetriNetUnfolderBase]: 109/259 cut-off events. [2024-11-12 08:02:57,493 INFO L125 PetriNetUnfolderBase]: For 82/88 co-relation queries the response was YES. [2024-11-12 08:02:57,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 259 events. 109/259 cut-off events. For 82/88 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1279 event pairs, 60 based on Foata normal form. 5/238 useless extension candidates. Maximal degree in co-relation 216. Up to 123 conditions per place. [2024-11-12 08:02:57,494 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-11-12 08:02:57,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 155 flow [2024-11-12 08:02:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:02:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:02:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-12 08:02:57,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-11-12 08:02:57,498 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 110 flow. Second operand 3 states and 93 transitions. [2024-11-12 08:02:57,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 155 flow [2024-11-12 08:02:57,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 143 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-12 08:02:57,500 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2024-11-12 08:02:57,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2024-11-12 08:02:57,501 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-11-12 08:02:57,501 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2024-11-12 08:02:57,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:02:57,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-11-12 08:02:57,505 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-12 08:02:57,506 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-12 08:02:57,506 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-11-12 08:02:57,507 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-12 08:02:57,507 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-12 08:02:57,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:02:57,508 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 08:02:57,516 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-12 08:02:57,517 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-12 08:02:57,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 08:02:57 BasicIcfg [2024-11-12 08:02:57,527 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-12 08:02:57,528 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-12 08:02:57,531 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-12 08:02:57,531 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-12 08:02:57,532 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:02:56" (3/4) ... [2024-11-12 08:02:57,533 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-12 08:02:57,540 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2024-11-12 08:02:57,540 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2024-11-12 08:02:57,543 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2024-11-12 08:02:57,545 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-12 08:02:57,545 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-12 08:02:57,545 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-12 08:02:57,625 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-12 08:02:57,625 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-12 08:02:57,626 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-12 08:02:57,626 INFO L158 Benchmark]: Toolchain (without parser) took 2328.38ms. Allocated memory is still 167.8MB. Free memory was 113.1MB in the beginning and 92.0MB in the end (delta: 21.1MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,627 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-12 08:02:57,627 INFO L158 Benchmark]: CACSL2BoogieTranslator took 547.11ms. Allocated memory is still 167.8MB. Free memory was 112.7MB in the beginning and 90.0MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,627 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.18ms. Allocated memory is still 167.8MB. Free memory was 90.0MB in the beginning and 88.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,628 INFO L158 Benchmark]: Boogie Preprocessor took 56.11ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 137.5MB in the end (delta: -49.2MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,628 INFO L158 Benchmark]: RCFGBuilder took 428.24ms. Allocated memory is still 167.8MB. Free memory was 137.4MB in the beginning and 121.4MB in the end (delta: 16.1MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,628 INFO L158 Benchmark]: TraceAbstraction took 1151.02ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 97.3MB in the end (delta: 23.2MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,629 INFO L158 Benchmark]: Witness Printer took 97.84ms. Allocated memory is still 167.8MB. Free memory was 96.2MB in the beginning and 92.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-12 08:02:57,631 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 547.11ms. Allocated memory is still 167.8MB. Free memory was 112.7MB in the beginning and 90.0MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.18ms. Allocated memory is still 167.8MB. Free memory was 90.0MB in the beginning and 88.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.11ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 137.5MB in the end (delta: -49.2MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * RCFGBuilder took 428.24ms. Allocated memory is still 167.8MB. Free memory was 137.4MB in the beginning and 121.4MB in the end (delta: 16.1MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. * TraceAbstraction took 1151.02ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 97.3MB in the end (delta: 23.2MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. * Witness Printer took 97.84ms. Allocated memory is still 167.8MB. Free memory was 96.2MB in the beginning and 92.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 774]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 759]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 123 IncrementalHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 11 mSDtfsCounter, 123 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 60 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-12 08:02:57,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE