./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/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:11:28,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:11:28,635 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:11:28,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:11:28,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:11:28,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:11:28,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:11:28,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:11:28,675 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:11:28,676 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:11:28,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:11:28,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:11:28,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:11:28,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:11:28,681 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:11:28,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:11:28,682 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:11:28,682 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:11:28,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:11:28,682 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:11:28,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:11:28,683 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:11:28,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:11:28,683 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:11:28,683 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:11:28,683 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:11:28,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:11:28,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:11:28,685 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:11:28,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:11:28,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:11:28,686 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:11:28,686 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2024-10-11 14:11:28,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:11:28,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:11:28,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:11:28,919 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:11:28,920 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:11:28,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-10-11 14:11:30,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:11:30,459 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:11:30,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-10-11 14:11:30,471 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9148460bf/6fde05ef029f4d27ab2aaf75f131e934/FLAG1c8fbb7e2 [2024-10-11 14:11:30,483 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9148460bf/6fde05ef029f4d27ab2aaf75f131e934 [2024-10-11 14:11:30,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:11:30,486 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:11:30,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:11:30,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:11:30,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:11:30,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:30,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60fbe952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30, skipping insertion in model container [2024-10-11 14:11:30,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:30,524 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:11:30,855 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/14_spin2003.i[30203,30216] [2024-10-11 14:11:30,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:11:30,883 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:11:30,926 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/14_spin2003.i[30203,30216] [2024-10-11 14:11:30,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:11:30,958 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:11:30,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30 WrapperNode [2024-10-11 14:11:30,958 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:11:30,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:11:30,960 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:11:30,960 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:11:30,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:30,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:30,994 INFO L138 Inliner]: procedures = 168, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 42 [2024-10-11 14:11:30,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:11:30,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:11:30,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:11:30,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:11:31,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,021 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 14:11:31,022 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,028 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:11:31,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:11:31,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:11:31,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:11:31,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (1/1) ... [2024-10-11 14:11:31,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:11:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:31,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:11:31,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:11:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 14:11:31,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 14:11:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:11:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:11:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:11:31,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:11:31,121 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:11:31,231 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:11:31,233 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:11:31,311 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:11:31,311 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:11:31,363 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:11:31,364 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 14:11:31,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:11:31 BoogieIcfgContainer [2024-10-11 14:11:31,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:11:31,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:11:31,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:11:31,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:11:31,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:11:30" (1/3) ... [2024-10-11 14:11:31,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22df4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:11:31, skipping insertion in model container [2024-10-11 14:11:31,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:30" (2/3) ... [2024-10-11 14:11:31,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22df4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:11:31, skipping insertion in model container [2024-10-11 14:11:31,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:11:31" (3/3) ... [2024-10-11 14:11:31,371 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-10-11 14:11:31,385 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:11:31,385 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:11:31,385 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:11:31,409 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:31,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 32 flow [2024-10-11 14:11:31,455 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-10-11 14:11:31,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:31,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 16 events. 1/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-11 14:11:31,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 14 transitions, 32 flow [2024-10-11 14:11:31,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 14 transitions, 32 flow [2024-10-11 14:11:31,466 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:31,476 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:31,477 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:11:31,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:31,481 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-10-11 14:11:31,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:31,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:31,482 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 14:11:31,482 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:11:31,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 145098612, now seen corresponding path program 1 times [2024-10-11 14:11:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123454194] [2024-10-11 14:11:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:31,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:31,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:31,621 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:31,623 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:11:31,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:11:31,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:11:31,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:11:31,626 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:11:31,630 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:31,634 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:11:31,647 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:31,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 58 flow [2024-10-11 14:11:31,656 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-10-11 14:11:31,657 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:11:31,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2024-10-11 14:11:31,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 58 flow [2024-10-11 14:11:31,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 58 flow [2024-10-11 14:11:31,659 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:31,660 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:31,660 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:11:31,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:31,665 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-10-11 14:11:31,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:11:31,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:31,666 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-10-11 14:11:31,666 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:31,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1750573610, now seen corresponding path program 1 times [2024-10-11 14:11:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:31,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678579300] [2024-10-11 14:11:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:31,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:31,702 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:31,703 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:31,703 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:11:31,703 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:11:31,704 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:11:31,704 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:11:31,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:11:31,704 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:11:31,705 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:31,705 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:11:31,720 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:31,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 86 flow [2024-10-11 14:11:31,730 INFO L124 PetriNetUnfolderBase]: 3/40 cut-off events. [2024-10-11 14:11:31,731 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:11:31,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 3/40 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 105 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2024-10-11 14:11:31,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 86 flow [2024-10-11 14:11:31,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 86 flow [2024-10-11 14:11:31,734 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:31,735 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:31,735 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:11:31,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:31,741 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-11 14:11:31,741 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:11:31,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:31,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:31,742 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:31,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2078378386, now seen corresponding path program 1 times [2024-10-11 14:11:31,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:31,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313148229] [2024-10-11 14:11:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:31,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:31,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313148229] [2024-10-11 14:11:31,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313148229] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:31,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:31,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667849712] [2024-10-11 14:11:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:31,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:31,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:31,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-11 14:11:31,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-11 14:11:31,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:31,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-11 14:11:31,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:32,100 INFO L124 PetriNetUnfolderBase]: 564/973 cut-off events. [2024-10-11 14:11:32,101 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-10-11 14:11:32,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 973 events. 564/973 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4960 event pairs, 564 based on Foata normal form. 172/1132 useless extension candidates. Maximal degree in co-relation 425. Up to 876 conditions per place. [2024-10-11 14:11:32,109 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2024-10-11 14:11:32,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2024-10-11 14:11:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-11 14:11:32,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:11:32,120 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 3 states and 51 transitions. [2024-10-11 14:11:32,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2024-10-11 14:11:32,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 98 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:32,125 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 66 flow [2024-10-11 14:11:32,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2024-10-11 14:11:32,129 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-10-11 14:11:32,130 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 66 flow [2024-10-11 14:11:32,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-11 14:11:32,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,130 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:11:32,130 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:32,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash -349841451, now seen corresponding path program 1 times [2024-10-11 14:11:32,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652732852] [2024-10-11 14:11:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:32,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:32,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:32,154 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:32,154 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:11:32,154 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:11:32,157 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:11:32,157 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:11:32,158 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:11:32,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:11:32,158 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:11:32,158 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:32,158 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:11:32,176 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:32,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 44 transitions, 116 flow [2024-10-11 14:11:32,181 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-10-11 14:11:32,182 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:11:32,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 52 events. 4/52 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 51. Up to 5 conditions per place. [2024-10-11 14:11:32,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 44 transitions, 116 flow [2024-10-11 14:11:32,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 44 transitions, 116 flow [2024-10-11 14:11:32,183 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:32,184 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:32,184 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:11:32,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:32,187 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-11 14:11:32,187 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:11:32,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,187 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,187 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:32,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -878966030, now seen corresponding path program 1 times [2024-10-11 14:11:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169512534] [2024-10-11 14:11:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169512534] [2024-10-11 14:11:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169512534] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:32,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:32,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:32,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965804372] [2024-10-11 14:11:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:32,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:32,266 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-10-11 14:11:32,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 116 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) [2024-10-11 14:11:32,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:32,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-10-11 14:11:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:32,716 INFO L124 PetriNetUnfolderBase]: 4064/6083 cut-off events. [2024-10-11 14:11:32,716 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-10-11 14:11:32,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 6083 events. 4064/6083 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35222 event pairs, 4064 based on Foata normal form. 1172/7194 useless extension candidates. Maximal degree in co-relation 1995. Up to 5626 conditions per place. [2024-10-11 14:11:32,819 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-10-11 14:11:32,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 134 flow [2024-10-11 14:11:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-10-11 14:11:32,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:11:32,822 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 116 flow. Second operand 3 states and 66 transitions. [2024-10-11 14:11:32,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 134 flow [2024-10-11 14:11:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 128 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:32,827 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 86 flow [2024-10-11 14:11:32,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-10-11 14:11:32,829 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-10-11 14:11:32,829 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 86 flow [2024-10-11 14:11:32,830 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) [2024-10-11 14:11:32,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,830 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:11:32,830 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:32,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash 463168177, now seen corresponding path program 1 times [2024-10-11 14:11:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617137097] [2024-10-11 14:11:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:32,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:32,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:32,853 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:32,853 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-11 14:11:32,853 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-11 14:11:32,854 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-10-11 14:11:32,854 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-11 14:11:32,854 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-11 14:11:32,854 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-11 14:11:32,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:11:32,854 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:11:32,855 WARN L239 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:32,855 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-10-11 14:11:32,869 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:32,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 54 transitions, 148 flow [2024-10-11 14:11:32,875 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2024-10-11 14:11:32,875 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-11 14:11:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 64 events. 5/64 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 179 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2024-10-11 14:11:32,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 54 transitions, 148 flow [2024-10-11 14:11:32,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 54 transitions, 148 flow [2024-10-11 14:11:32,878 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:32,879 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:32,880 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 14:11:32,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:32,881 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-11 14:11:32,882 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:11:32,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,882 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,882 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-10-11 14:11:32,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1270650304, now seen corresponding path program 1 times [2024-10-11 14:11:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733769960] [2024-10-11 14:11:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:32,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733769960] [2024-10-11 14:11:32,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733769960] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:32,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:32,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738275734] [2024-10-11 14:11:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:32,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:32,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-11 14:11:32,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-11 14:11:32,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:32,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-11 14:11:32,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:35,883 INFO L124 PetriNetUnfolderBase]: 26564/36649 cut-off events. [2024-10-11 14:11:35,883 INFO L125 PetriNetUnfolderBase]: For 13590/13590 co-relation queries the response was YES. [2024-10-11 14:11:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75524 conditions, 36649 events. 26564/36649 cut-off events. For 13590/13590 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 230098 event pairs, 26564 based on Foata normal form. 7422/43770 useless extension candidates. Maximal degree in co-relation 12605. Up to 34376 conditions per place. [2024-10-11 14:11:36,111 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-10-11 14:11:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 170 flow [2024-10-11 14:11:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-10-11 14:11:36,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:11:36,115 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 148 flow. Second operand 3 states and 81 transitions. [2024-10-11 14:11:36,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 170 flow [2024-10-11 14:11:36,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 158 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:36,125 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 106 flow [2024-10-11 14:11:36,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-10-11 14:11:36,127 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-11 14:11:36,127 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 106 flow [2024-10-11 14:11:36,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-11 14:11:36,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:36,128 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:36,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:11:36,128 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-10-11 14:11:36,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2014962774, now seen corresponding path program 1 times [2024-10-11 14:11:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119352151] [2024-10-11 14:11:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:36,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:36,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:36,164 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:36,166 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-11 14:11:36,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-10-11 14:11:36,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-10-11 14:11:36,168 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-10-11 14:11:36,168 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-10-11 14:11:36,169 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-10-11 14:11:36,169 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-10-11 14:11:36,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:11:36,169 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:11:36,170 WARN L239 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:36,170 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-10-11 14:11:36,193 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 182 flow [2024-10-11 14:11:36,203 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-10-11 14:11:36,203 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-11 14:11:36,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 76 events. 6/76 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 88. Up to 7 conditions per place. [2024-10-11 14:11:36,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 182 flow [2024-10-11 14:11:36,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 64 transitions, 182 flow [2024-10-11 14:11:36,205 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:36,207 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:36,207 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-11 14:11:36,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:36,209 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-11 14:11:36,209 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:11:36,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:36,209 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:36,209 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-10-11 14:11:36,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash -36940969, now seen corresponding path program 1 times [2024-10-11 14:11:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320255485] [2024-10-11 14:11:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320255485] [2024-10-11 14:11:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320255485] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:36,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:36,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444620025] [2024-10-11 14:11:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:36,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:36,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-11 14:11:36,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:36,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:36,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-11 14:11:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:51,220 INFO L124 PetriNetUnfolderBase]: 164064/214479 cut-off events. [2024-10-11 14:11:51,220 INFO L125 PetriNetUnfolderBase]: For 98095/98095 co-relation queries the response was YES. [2024-10-11 14:11:51,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443980 conditions, 214479 events. 164064/214479 cut-off events. For 98095/98095 co-relation queries the response was YES. Maximal size of possible extension queue 6190. Compared 1413929 event pairs, 164064 based on Foata normal form. 44922/257900 useless extension candidates. Maximal degree in co-relation 76296. Up to 203126 conditions per place. [2024-10-11 14:11:52,547 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 31 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-10-11 14:11:52,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 208 flow [2024-10-11 14:11:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-11 14:11:52,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:11:52,549 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 182 flow. Second operand 3 states and 96 transitions. [2024-10-11 14:11:52,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 208 flow [2024-10-11 14:11:52,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 188 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:52,604 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 126 flow [2024-10-11 14:11:52,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-10-11 14:11:52,605 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2024-10-11 14:11:52,605 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 126 flow [2024-10-11 14:11:52,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:52,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:52,606 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:52,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:11:52,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-10-11 14:11:52,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1396920320, now seen corresponding path program 1 times [2024-10-11 14:11:52,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:52,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426533442] [2024-10-11 14:11:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:52,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:52,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:52,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:52,640 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:52,640 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-11 14:11:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-10-11 14:11:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-10-11 14:11:52,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-10-11 14:11:52,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-10-11 14:11:52,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-10-11 14:11:52,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-10-11 14:11:52,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-10-11 14:11:52,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:11:52,641 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:11:52,642 WARN L239 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:52,642 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-10-11 14:11:52,671 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:52,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 218 flow [2024-10-11 14:11:52,680 INFO L124 PetriNetUnfolderBase]: 7/88 cut-off events. [2024-10-11 14:11:52,680 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-11 14:11:52,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 88 events. 7/88 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 273 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2024-10-11 14:11:52,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 218 flow [2024-10-11 14:11:52,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 74 transitions, 218 flow [2024-10-11 14:11:52,683 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:52,685 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;@4c5bfae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:52,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-11 14:11:52,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:52,688 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-11 14:11:52,688 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:11:52,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:52,688 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:52,688 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-10-11 14:11:52,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash -489595063, now seen corresponding path program 1 times [2024-10-11 14:11:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20691787] [2024-10-11 14:11:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:52,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:52,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20691787] [2024-10-11 14:11:52,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20691787] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:52,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:52,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:52,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001172801] [2024-10-11 14:11:52,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:52,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:52,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:52,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-10-11 14:11:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:52,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:52,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-10-11 14:11:52,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand