/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:09:53,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:09:53,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:09:53,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:09:53,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:09:53,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:09:53,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:09:53,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:09:53,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:09:53,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:09:53,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:09:53,956 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:09:53,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:09:53,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:09:53,957 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:09:53,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:09:53,958 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:09:53,958 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:09:53,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:09:53,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:09:53,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:09:53,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:09:53,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:09:53,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:09:53,969 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:09:53,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:09:53,969 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:09:53,970 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:09:53,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:09:53,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:09:53,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:09:53,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:09:53,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:09:53,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:09:53,972 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:09:53,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:09:54,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:09:54,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:09:54,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:09:54,190 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:09:54,192 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:09:54,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i [2023-08-03 22:09:55,213 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:09:55,402 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:09:55,403 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i [2023-08-03 22:09:55,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0edc9781/7d4e9ba700a349e89064081ba579c907/FLAG3f18f7ad5 [2023-08-03 22:09:55,420 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0edc9781/7d4e9ba700a349e89064081ba579c907 [2023-08-03 22:09:55,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:09:55,423 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:09:55,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:09:55,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:09:55,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:09:55,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e3f362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55, skipping insertion in model container [2023-08-03 22:09:55,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,458 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:09:55,546 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i[1107,1120] [2023-08-03 22:09:55,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:09:55,674 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:09:55,684 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i[1107,1120] [2023-08-03 22:09:55,701 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:09:55,702 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-03 22:09:55,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:09:55,738 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:09:55,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55 WrapperNode [2023-08-03 22:09:55,739 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:09:55,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:09:55,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:09:55,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:09:55,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,790 INFO L138 Inliner]: procedures = 165, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-03 22:09:55,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:09:55,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:09:55,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:09:55,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:09:55,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,809 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:09:55,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:09:55,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:09:55,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:09:55,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (1/1) ... [2023-08-03 22:09:55,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:09:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:09:55,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:09:55,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:09:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-03 22:09:55,875 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-03 22:09:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:09:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:09:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:09:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:09:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:09:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:09:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:09:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:09:55,882 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:09:56,033 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:09:56,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:09:56,209 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:09:56,213 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:09:56,213 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 22:09:56,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:09:56 BoogieIcfgContainer [2023-08-03 22:09:56,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:09:56,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:09:56,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:09:56,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:09:56,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:09:55" (1/3) ... [2023-08-03 22:09:56,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22798e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:09:56, skipping insertion in model container [2023-08-03 22:09:56,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:09:55" (2/3) ... [2023-08-03 22:09:56,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22798e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:09:56, skipping insertion in model container [2023-08-03 22:09:56,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:09:56" (3/3) ... [2023-08-03 22:09:56,220 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_69-refine-protected-loop-interval_true_bound2.i [2023-08-03 22:09:56,224 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:09:56,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:09:56,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:09:56,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:09:56,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:09:56,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,325 INFO L124 PetriNetUnfolderBase]: 15/144 cut-off events. [2023-08-03 22:09:56,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:09:56,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 15/144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2023-08-03 22:09:56,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:09:56,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-03 22:09:56,362 INFO L124 PetriNetUnfolderBase]: 15/144 cut-off events. [2023-08-03 22:09:56,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:09:56,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 15/144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2023-08-03 22:09:56,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 3344 [2023-08-03 22:09:58,266 INFO L134 LiptonReduction]: Checked pairs total: 5662 [2023-08-03 22:09:58,266 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-03 22:09:58,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:09:58,283 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2e271d5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:09:58,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:09:58,288 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:09:58,288 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-08-03 22:09:58,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:09:58,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:58,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:09:58,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:09:58,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash 680655626, now seen corresponding path program 1 times [2023-08-03 22:09:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144829778] [2023-08-03 22:09:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:09:58,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:09:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:09:58,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:09:58,420 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:09:58,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:09:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:09:58,422 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:09:58,424 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:09:58,424 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:09:58,424 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:09:58,441 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:09:58,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,484 INFO L124 PetriNetUnfolderBase]: 26/226 cut-off events. [2023-08-03 22:09:58,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:09:58,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 226 events. 26/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 703 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-03 22:09:58,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,487 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:09:58,487 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,488 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:09:58,512 INFO L124 PetriNetUnfolderBase]: 26/226 cut-off events. [2023-08-03 22:09:58,512 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:09:58,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 226 events. 26/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 703 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-03 22:09:58,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 10648 [2023-08-03 22:10:01,033 INFO L134 LiptonReduction]: Checked pairs total: 21022 [2023-08-03 22:10:01,033 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-03 22:10:01,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:10:01,035 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2e271d5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:10:01,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:10:01,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:10:01,039 INFO L124 PetriNetUnfolderBase]: 11/60 cut-off events. [2023-08-03 22:10:01,039 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:01,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:01,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:10:01,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:10:01,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 182988910, now seen corresponding path program 1 times [2023-08-03 22:10:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545724618] [2023-08-03 22:10:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:01,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545724618] [2023-08-03 22:10:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545724618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:10:01,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652008329] [2023-08-03 22:10:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:01,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:01,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:10:01,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:10:01,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:10:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:01,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:10:01,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:10:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:01,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:10:01,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652008329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:01,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:10:01,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:10:01,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126519331] [2023-08-03 22:10:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:10:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:10:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:10:01,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 302 [2023-08-03 22:10:01,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 22:10:01,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:01,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 302 [2023-08-03 22:10:01,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:01,480 INFO L124 PetriNetUnfolderBase]: 1557/2406 cut-off events. [2023-08-03 22:10:01,481 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-03 22:10:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4633 conditions, 2406 events. 1557/2406 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13150 event pairs, 49 based on Foata normal form. 133/1931 useless extension candidates. Maximal degree in co-relation 882. Up to 1953 conditions per place. [2023-08-03 22:10:01,484 INFO L140 encePairwiseOnDemand]: 294/302 looper letters, 0 selfloop transitions, 0 changer transitions 77/77 dead transitions. [2023-08-03 22:10:01,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 294 flow [2023-08-03 22:10:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:10:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:10:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 747 transitions. [2023-08-03 22:10:01,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947019867549669 [2023-08-03 22:10:01,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 747 transitions. [2023-08-03 22:10:01,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 747 transitions. [2023-08-03 22:10:01,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:01,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 747 transitions. [2023-08-03 22:10:01,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.4) internal successors, (747), 5 states have internal predecessors, (747), 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) [2023-08-03 22:10:01,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 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) [2023-08-03 22:10:01,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 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) [2023-08-03 22:10:01,506 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 108 flow. Second operand 5 states and 747 transitions. [2023-08-03 22:10:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 294 flow [2023-08-03 22:10:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:01,509 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-03 22:10:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-03 22:10:01,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-03 22:10:01,512 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-03 22:10:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 22:10:01,513 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:10:01,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 22:10:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:01,718 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:10:01,718 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:10:01,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,732 INFO L124 PetriNetUnfolderBase]: 26/226 cut-off events. [2023-08-03 22:10:01,732 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:01,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 226 events. 26/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 703 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-03 22:10:01,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:10:01,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 157 transitions, 326 flow [2023-08-03 22:10:01,746 INFO L124 PetriNetUnfolderBase]: 26/226 cut-off events. [2023-08-03 22:10:01,746 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:01,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 226 events. 26/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 703 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-03 22:10:01,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 10648 [2023-08-03 22:10:03,774 INFO L134 LiptonReduction]: Checked pairs total: 19993 [2023-08-03 22:10:03,774 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-03 22:10:03,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:10:03,776 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2e271d5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:10:03,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 22:10:03,778 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:10:03,778 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-08-03 22:10:03,779 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:10:03,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:03,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:03,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:03,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:03,779 INFO L85 PathProgramCache]: Analyzing trace with hash 364905295, now seen corresponding path program 1 times [2023-08-03 22:10:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:03,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729047751] [2023-08-03 22:10:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:03,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:03,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729047751] [2023-08-03 22:10:03,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729047751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:03,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:03,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:10:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412308103] [2023-08-03 22:10:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:10:03,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:10:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:10:03,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 303 [2023-08-03 22:10:03,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2023-08-03 22:10:03,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:03,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 303 [2023-08-03 22:10:03,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:04,056 INFO L124 PetriNetUnfolderBase]: 1891/2894 cut-off events. [2023-08-03 22:10:04,056 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 22:10:04,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5619 conditions, 2894 events. 1891/2894 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14278 event pairs, 938 based on Foata normal form. 141/2361 useless extension candidates. Maximal degree in co-relation 4683. Up to 2199 conditions per place. [2023-08-03 22:10:04,067 INFO L140 encePairwiseOnDemand]: 286/303 looper letters, 51 selfloop transitions, 6 changer transitions 1/66 dead transitions. [2023-08-03 22:10:04,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 258 flow [2023-08-03 22:10:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:10:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:10:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-03 22:10:04,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504950495049505 [2023-08-03 22:10:04,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-03 22:10:04,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-03 22:10:04,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:04,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-03 22:10:04,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2023-08-03 22:10:04,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-03 22:10:04,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-03 22:10:04,071 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 108 flow. Second operand 3 states and 459 transitions. [2023-08-03 22:10:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 258 flow [2023-08-03 22:10:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 66 transitions, 256 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 22:10:04,073 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 152 flow [2023-08-03 22:10:04,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-08-03 22:10:04,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-03 22:10:04,074 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 152 flow [2023-08-03 22:10:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2023-08-03 22:10:04,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:04,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:10:04,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:04,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 336796262, now seen corresponding path program 1 times [2023-08-03 22:10:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:04,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714646341] [2023-08-03 22:10:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:04,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714646341] [2023-08-03 22:10:04,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714646341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:10:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642334289] [2023-08-03 22:10:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:10:04,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:10:04,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:10:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:04,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:10:04,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:10:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:04,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:10:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642334289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:10:04,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:10:04,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:10:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139914590] [2023-08-03 22:10:04,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:10:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:10:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:10:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:10:04,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 303 [2023-08-03 22:10:04,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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) [2023-08-03 22:10:04,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:04,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 303 [2023-08-03 22:10:04,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:04,720 INFO L124 PetriNetUnfolderBase]: 1679/2565 cut-off events. [2023-08-03 22:10:04,720 INFO L125 PetriNetUnfolderBase]: For 778/884 co-relation queries the response was YES. [2023-08-03 22:10:04,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 2565 events. 1679/2565 cut-off events. For 778/884 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13110 event pairs, 897 based on Foata normal form. 0/2240 useless extension candidates. Maximal degree in co-relation 5318. Up to 2252 conditions per place. [2023-08-03 22:10:04,734 INFO L140 encePairwiseOnDemand]: 299/303 looper letters, 41 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-03 22:10:04,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 266 flow [2023-08-03 22:10:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:10:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:10:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-03 22:10:04,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777227722772277 [2023-08-03 22:10:04,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-03 22:10:04,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-03 22:10:04,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:04,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-03 22:10:04,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 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) [2023-08-03 22:10:04,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 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) [2023-08-03 22:10:04,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 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) [2023-08-03 22:10:04,745 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 152 flow. Second operand 4 states and 579 transitions. [2023-08-03 22:10:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 266 flow [2023-08-03 22:10:04,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:10:04,756 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 160 flow [2023-08-03 22:10:04,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-03 22:10:04,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-03 22:10:04,758 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 160 flow [2023-08-03 22:10:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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) [2023-08-03 22:10:04,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:04,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 22:10:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 22:10:04,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:04,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1671265875, now seen corresponding path program 1 times [2023-08-03 22:10:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:04,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319498760] [2023-08-03 22:10:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:04,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:10:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319498760] [2023-08-03 22:10:05,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319498760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:05,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:05,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:10:05,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684404072] [2023-08-03 22:10:05,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:05,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:10:05,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:10:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:10:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 303 [2023-08-03 22:10:05,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2023-08-03 22:10:05,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:05,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 303 [2023-08-03 22:10:05,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:05,099 INFO L124 PetriNetUnfolderBase]: 87/241 cut-off events. [2023-08-03 22:10:05,099 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-03 22:10:05,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 241 events. 87/241 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 819 event pairs, 5 based on Foata normal form. 96/316 useless extension candidates. Maximal degree in co-relation 468. Up to 151 conditions per place. [2023-08-03 22:10:05,100 INFO L140 encePairwiseOnDemand]: 294/303 looper letters, 23 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-08-03 22:10:05,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 265 flow [2023-08-03 22:10:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:10:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:10:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-03 22:10:05,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46974697469746973 [2023-08-03 22:10:05,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-03 22:10:05,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-03 22:10:05,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:05,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-03 22:10:05,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2023-08-03 22:10:05,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-03 22:10:05,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-03 22:10:05,104 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 160 flow. Second operand 3 states and 427 transitions. [2023-08-03 22:10:05,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 265 flow [2023-08-03 22:10:05,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 252 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-03 22:10:05,105 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 143 flow [2023-08-03 22:10:05,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-03 22:10:05,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-03 22:10:05,106 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 143 flow [2023-08-03 22:10:05,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2023-08-03 22:10:05,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:05,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:05,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:10:05,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:05,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash -468599298, now seen corresponding path program 1 times [2023-08-03 22:10:05,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:05,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468333038] [2023-08-03 22:10:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:05,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468333038] [2023-08-03 22:10:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468333038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:10:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984326622] [2023-08-03 22:10:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:10:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:10:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:10:05,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-08-03 22:10:05,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 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) [2023-08-03 22:10:05,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:05,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-08-03 22:10:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:05,278 INFO L124 PetriNetUnfolderBase]: 95/266 cut-off events. [2023-08-03 22:10:05,278 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-03 22:10:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 266 events. 95/266 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 903 event pairs, 44 based on Foata normal form. 8/266 useless extension candidates. Maximal degree in co-relation 571. Up to 105 conditions per place. [2023-08-03 22:10:05,279 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 38 selfloop transitions, 10 changer transitions 5/58 dead transitions. [2023-08-03 22:10:05,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 297 flow [2023-08-03 22:10:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:10:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:10:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 788 transitions. [2023-08-03 22:10:05,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43344334433443343 [2023-08-03 22:10:05,281 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 788 transitions. [2023-08-03 22:10:05,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 788 transitions. [2023-08-03 22:10:05,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:05,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 788 transitions. [2023-08-03 22:10:05,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.33333333333334) internal successors, (788), 6 states have internal predecessors, (788), 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) [2023-08-03 22:10:05,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:05,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:05,285 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 143 flow. Second operand 6 states and 788 transitions. [2023-08-03 22:10:05,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 297 flow [2023-08-03 22:10:05,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:05,287 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 199 flow [2023-08-03 22:10:05,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=199, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-03 22:10:05,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-03 22:10:05,289 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 199 flow [2023-08-03 22:10:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 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) [2023-08-03 22:10:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:05,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:10:05,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:05,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1641675790, now seen corresponding path program 1 times [2023-08-03 22:10:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:05,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890390359] [2023-08-03 22:10:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:05,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:05,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890390359] [2023-08-03 22:10:05,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890390359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:05,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:05,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:10:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570009956] [2023-08-03 22:10:05,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:05,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:10:05,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:10:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:10:05,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 303 [2023-08-03 22:10:05,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 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) [2023-08-03 22:10:05,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:05,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 303 [2023-08-03 22:10:05,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:05,472 INFO L124 PetriNetUnfolderBase]: 97/277 cut-off events. [2023-08-03 22:10:05,472 INFO L125 PetriNetUnfolderBase]: For 204/206 co-relation queries the response was YES. [2023-08-03 22:10:05,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 277 events. 97/277 cut-off events. For 204/206 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 969 event pairs, 22 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 678. Up to 72 conditions per place. [2023-08-03 22:10:05,473 INFO L140 encePairwiseOnDemand]: 293/303 looper letters, 53 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2023-08-03 22:10:05,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 495 flow [2023-08-03 22:10:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:10:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:10:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-08-03 22:10:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627062706270627 [2023-08-03 22:10:05,475 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-08-03 22:10:05,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-08-03 22:10:05,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:05,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-08-03 22:10:05,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 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) [2023-08-03 22:10:05,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 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) [2023-08-03 22:10:05,479 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 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) [2023-08-03 22:10:05,479 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 199 flow. Second operand 5 states and 701 transitions. [2023-08-03 22:10:05,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 495 flow [2023-08-03 22:10:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:05,481 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 339 flow [2023-08-03 22:10:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-03 22:10:05,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-08-03 22:10:05,481 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 339 flow [2023-08-03 22:10:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 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) [2023-08-03 22:10:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:05,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:05,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:10:05,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:05,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash -392471580, now seen corresponding path program 1 times [2023-08-03 22:10:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608449574] [2023-08-03 22:10:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608449574] [2023-08-03 22:10:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608449574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:05,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:05,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:10:05,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411475441] [2023-08-03 22:10:05,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:05,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:10:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:10:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:10:05,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 303 [2023-08-03 22:10:05,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 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) [2023-08-03 22:10:05,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:05,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 303 [2023-08-03 22:10:05,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:05,615 INFO L124 PetriNetUnfolderBase]: 105/297 cut-off events. [2023-08-03 22:10:05,616 INFO L125 PetriNetUnfolderBase]: For 537/539 co-relation queries the response was YES. [2023-08-03 22:10:05,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 297 events. 105/297 cut-off events. For 537/539 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1051 event pairs, 25 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 855. Up to 73 conditions per place. [2023-08-03 22:10:05,617 INFO L140 encePairwiseOnDemand]: 293/303 looper letters, 53 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2023-08-03 22:10:05,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 725 flow [2023-08-03 22:10:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:10:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:10:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2023-08-03 22:10:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613861386138614 [2023-08-03 22:10:05,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2023-08-03 22:10:05,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2023-08-03 22:10:05,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:05,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2023-08-03 22:10:05,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2023-08-03 22:10:05,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 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) [2023-08-03 22:10:05,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 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) [2023-08-03 22:10:05,622 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 339 flow. Second operand 5 states and 699 transitions. [2023-08-03 22:10:05,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 725 flow [2023-08-03 22:10:05,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 725 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:10:05,624 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 549 flow [2023-08-03 22:10:05,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2023-08-03 22:10:05,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2023-08-03 22:10:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 549 flow [2023-08-03 22:10:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 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) [2023-08-03 22:10:05,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 22:10:05,625 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:05,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash 656757434, now seen corresponding path program 2 times [2023-08-03 22:10:05,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:05,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698934299] [2023-08-03 22:10:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698934299] [2023-08-03 22:10:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698934299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:10:05,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189454789] [2023-08-03 22:10:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:10:05,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:10:05,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:10:05,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:10:05,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:10:05,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:10:05,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 22:10:05,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:10:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:05,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:10:05,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189454789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:05,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:10:05,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-08-03 22:10:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549939192] [2023-08-03 22:10:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 22:10:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 22:10:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:10:05,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-08-03 22:10:05,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 549 flow. Second operand has 7 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 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) [2023-08-03 22:10:05,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:05,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-08-03 22:10:05,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:05,941 INFO L124 PetriNetUnfolderBase]: 153/423 cut-off events. [2023-08-03 22:10:05,942 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2023-08-03 22:10:05,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 423 events. 153/423 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1683 event pairs, 68 based on Foata normal form. 16/439 useless extension candidates. Maximal degree in co-relation 1308. Up to 164 conditions per place. [2023-08-03 22:10:05,944 INFO L140 encePairwiseOnDemand]: 292/303 looper letters, 71 selfloop transitions, 26 changer transitions 5/107 dead transitions. [2023-08-03 22:10:05,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 979 flow [2023-08-03 22:10:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 22:10:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 22:10:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1167 transitions. [2023-08-03 22:10:05,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794279427942794 [2023-08-03 22:10:05,955 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1167 transitions. [2023-08-03 22:10:05,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1167 transitions. [2023-08-03 22:10:05,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:05,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1167 transitions. [2023-08-03 22:10:05,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 129.66666666666666) internal successors, (1167), 9 states have internal predecessors, (1167), 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) [2023-08-03 22:10:05,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 303.0) internal successors, (3030), 10 states have internal predecessors, (3030), 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) [2023-08-03 22:10:05,960 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 303.0) internal successors, (3030), 10 states have internal predecessors, (3030), 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) [2023-08-03 22:10:05,960 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 549 flow. Second operand 9 states and 1167 transitions. [2023-08-03 22:10:05,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 979 flow [2023-08-03 22:10:05,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 979 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:10:05,963 INFO L231 Difference]: Finished difference. Result has 73 places, 83 transitions, 809 flow [2023-08-03 22:10:05,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=809, PETRI_PLACES=73, PETRI_TRANSITIONS=83} [2023-08-03 22:10:05,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2023-08-03 22:10:05,964 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 83 transitions, 809 flow [2023-08-03 22:10:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 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) [2023-08-03 22:10:05,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:05,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:05,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 22:10:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:06,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1220023708, now seen corresponding path program 1 times [2023-08-03 22:10:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869533483] [2023-08-03 22:10:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869533483] [2023-08-03 22:10:06,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869533483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:06,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:06,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 22:10:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422085904] [2023-08-03 22:10:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:10:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:10:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:10:06,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-08-03 22:10:06,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 83 transitions, 809 flow. Second operand has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 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) [2023-08-03 22:10:06,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:06,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-08-03 22:10:06,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:06,413 INFO L124 PetriNetUnfolderBase]: 175/471 cut-off events. [2023-08-03 22:10:06,413 INFO L125 PetriNetUnfolderBase]: For 1824/1824 co-relation queries the response was YES. [2023-08-03 22:10:06,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1738 conditions, 471 events. 175/471 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1962 event pairs, 72 based on Foata normal form. 8/479 useless extension candidates. Maximal degree in co-relation 1612. Up to 190 conditions per place. [2023-08-03 22:10:06,415 INFO L140 encePairwiseOnDemand]: 291/303 looper letters, 49 selfloop transitions, 46 changer transitions 7/110 dead transitions. [2023-08-03 22:10:06,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 1179 flow [2023-08-03 22:10:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:10:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:10:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 793 transitions. [2023-08-03 22:10:06,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361936193619362 [2023-08-03 22:10:06,417 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:06,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 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) [2023-08-03 22:10:06,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:06,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:06,423 INFO L175 Difference]: Start difference. First operand has 73 places, 83 transitions, 809 flow. Second operand 6 states and 793 transitions. [2023-08-03 22:10:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 1179 flow [2023-08-03 22:10:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 1159 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-03 22:10:06,427 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 1009 flow [2023-08-03 22:10:06,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1009, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-08-03 22:10:06,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2023-08-03 22:10:06,429 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 1009 flow [2023-08-03 22:10:06,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 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) [2023-08-03 22:10:06,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:06,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:06,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 22:10:06,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:06,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1868291242, now seen corresponding path program 1 times [2023-08-03 22:10:06,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:06,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955469995] [2023-08-03 22:10:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:06,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:06,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955469995] [2023-08-03 22:10:06,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955469995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:06,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:06,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 22:10:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322061136] [2023-08-03 22:10:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:06,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:10:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:10:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:10:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-08-03 22:10:06,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 1009 flow. Second operand has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 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) [2023-08-03 22:10:06,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:06,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-08-03 22:10:06,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:06,679 INFO L124 PetriNetUnfolderBase]: 189/503 cut-off events. [2023-08-03 22:10:06,680 INFO L125 PetriNetUnfolderBase]: For 2707/2707 co-relation queries the response was YES. [2023-08-03 22:10:06,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 503 events. 189/503 cut-off events. For 2707/2707 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2114 event pairs, 76 based on Foata normal form. 8/511 useless extension candidates. Maximal degree in co-relation 1877. Up to 200 conditions per place. [2023-08-03 22:10:06,682 INFO L140 encePairwiseOnDemand]: 291/303 looper letters, 47 selfloop transitions, 52 changer transitions 10/117 dead transitions. [2023-08-03 22:10:06,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1418 flow [2023-08-03 22:10:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:10:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:10:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 793 transitions. [2023-08-03 22:10:06,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361936193619362 [2023-08-03 22:10:06,684 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:06,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 793 transitions. [2023-08-03 22:10:06,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 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) [2023-08-03 22:10:06,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:06,688 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-03 22:10:06,688 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 1009 flow. Second operand 6 states and 793 transitions. [2023-08-03 22:10:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1418 flow [2023-08-03 22:10:06,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1338 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-03 22:10:06,696 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 1178 flow [2023-08-03 22:10:06,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1178, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-08-03 22:10:06,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2023-08-03 22:10:06,697 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 1178 flow [2023-08-03 22:10:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 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) [2023-08-03 22:10:06,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:06,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 22:10:06,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:06,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash 6924452, now seen corresponding path program 2 times [2023-08-03 22:10:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:06,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026434976] [2023-08-03 22:10:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026434976] [2023-08-03 22:10:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026434976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:06,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:06,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:10:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437623941] [2023-08-03 22:10:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:06,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:10:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:10:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:10:06,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 303 [2023-08-03 22:10:06,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 1178 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2023-08-03 22:10:06,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:06,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 303 [2023-08-03 22:10:06,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:06,937 INFO L124 PetriNetUnfolderBase]: 187/497 cut-off events. [2023-08-03 22:10:06,938 INFO L125 PetriNetUnfolderBase]: For 3174/3174 co-relation queries the response was YES. [2023-08-03 22:10:06,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 497 events. 187/497 cut-off events. For 3174/3174 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2042 event pairs, 83 based on Foata normal form. 8/505 useless extension candidates. Maximal degree in co-relation 1926. Up to 275 conditions per place. [2023-08-03 22:10:06,940 INFO L140 encePairwiseOnDemand]: 291/303 looper letters, 68 selfloop transitions, 38 changer transitions 5/115 dead transitions. [2023-08-03 22:10:06,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 1509 flow [2023-08-03 22:10:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:10:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:10:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 890 transitions. [2023-08-03 22:10:06,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41961338991041963 [2023-08-03 22:10:06,943 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 890 transitions. [2023-08-03 22:10:06,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 890 transitions. [2023-08-03 22:10:06,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:06,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 890 transitions. [2023-08-03 22:10:06,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 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) [2023-08-03 22:10:06,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 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) [2023-08-03 22:10:06,947 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 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) [2023-08-03 22:10:06,947 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 1178 flow. Second operand 7 states and 890 transitions. [2023-08-03 22:10:06,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 1509 flow [2023-08-03 22:10:06,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 1474 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-03 22:10:06,953 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 1338 flow [2023-08-03 22:10:06,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2023-08-03 22:10:06,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2023-08-03 22:10:06,954 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 1338 flow [2023-08-03 22:10:06,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2023-08-03 22:10:06,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:06,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:06,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 22:10:06,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:10:06,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 20496074, now seen corresponding path program 2 times [2023-08-03 22:10:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:06,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113825262] [2023-08-03 22:10:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:06,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:10:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:07,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113825262] [2023-08-03 22:10:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113825262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:10:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317972196] [2023-08-03 22:10:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:10:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:10:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:10:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 303 [2023-08-03 22:10:07,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 1338 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2023-08-03 22:10:07,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:07,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 303 [2023-08-03 22:10:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:07,174 INFO L124 PetriNetUnfolderBase]: 178/474 cut-off events. [2023-08-03 22:10:07,175 INFO L125 PetriNetUnfolderBase]: For 3807/3807 co-relation queries the response was YES. [2023-08-03 22:10:07,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 474 events. 178/474 cut-off events. For 3807/3807 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1894 event pairs, 76 based on Foata normal form. 8/482 useless extension candidates. Maximal degree in co-relation 1934. Up to 275 conditions per place. [2023-08-03 22:10:07,176 INFO L140 encePairwiseOnDemand]: 291/303 looper letters, 0 selfloop transitions, 0 changer transitions 110/110 dead transitions. [2023-08-03 22:10:07,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 1555 flow [2023-08-03 22:10:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:10:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:10:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 886 transitions. [2023-08-03 22:10:07,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41772748703441775 [2023-08-03 22:10:07,178 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 886 transitions. [2023-08-03 22:10:07,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 886 transitions. [2023-08-03 22:10:07,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:07,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 886 transitions. [2023-08-03 22:10:07,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.57142857142857) internal successors, (886), 7 states have internal predecessors, (886), 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) [2023-08-03 22:10:07,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 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) [2023-08-03 22:10:07,182 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 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) [2023-08-03 22:10:07,182 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 1338 flow. Second operand 7 states and 886 transitions. [2023-08-03 22:10:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 1555 flow [2023-08-03 22:10:07,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 1542 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:07,189 INFO L231 Difference]: Finished difference. Result has 88 places, 0 transitions, 0 flow [2023-08-03 22:10:07,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=88, PETRI_TRANSITIONS=0} [2023-08-03 22:10:07,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2023-08-03 22:10:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 0 transitions, 0 flow [2023-08-03 22:10:07,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 22:10:07,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 22:10:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 22:10:07,191 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:10:07,191 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (2/2) [2023-08-03 22:10:07,193 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:10:07,193 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:10:07,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:10:07 BasicIcfg [2023-08-03 22:10:07,196 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:10:07,196 INFO L158 Benchmark]: Toolchain (without parser) took 11773.62ms. Allocated memory was 543.2MB in the beginning and 679.5MB in the end (delta: 136.3MB). Free memory was 507.6MB in the beginning and 438.6MB in the end (delta: 69.0MB). Peak memory consumption was 205.8MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,196 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 364.9MB. Free memory is still 322.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:10:07,197 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.95ms. Allocated memory is still 543.2MB. Free memory was 507.1MB in the beginning and 487.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.39ms. Allocated memory is still 543.2MB. Free memory was 487.6MB in the beginning and 485.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,197 INFO L158 Benchmark]: Boogie Preprocessor took 20.29ms. Allocated memory is still 543.2MB. Free memory was 485.6MB in the beginning and 484.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,197 INFO L158 Benchmark]: RCFGBuilder took 403.10ms. Allocated memory is still 543.2MB. Free memory was 484.0MB in the beginning and 469.1MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,197 INFO L158 Benchmark]: TraceAbstraction took 10979.91ms. Allocated memory was 543.2MB in the beginning and 679.5MB in the end (delta: 136.3MB). Free memory was 468.5MB in the beginning and 438.6MB in the end (delta: 29.9MB). Peak memory consumption was 168.1MB. Max. memory is 16.0GB. [2023-08-03 22:10:07,198 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 364.9MB. Free memory is still 322.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 315.95ms. Allocated memory is still 543.2MB. Free memory was 507.1MB in the beginning and 487.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.39ms. Allocated memory is still 543.2MB. Free memory was 487.6MB in the beginning and 485.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.29ms. Allocated memory is still 543.2MB. Free memory was 485.6MB in the beginning and 484.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 403.10ms. Allocated memory is still 543.2MB. Free memory was 484.0MB in the beginning and 469.1MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 10979.91ms. Allocated memory was 543.2MB in the beginning and 679.5MB in the end (delta: 136.3MB). Free memory was 468.5MB in the beginning and 438.6MB in the end (delta: 29.9MB). Peak memory consumption was 168.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 104 PlacesBefore, 27 PlacesAfterwards, 112 TransitionsBefore, 30 TransitionsAfterwards, 3344 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 5 ChoiceCompositions, 103 TotalNumberOfCompositions, 5662 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4606, independent: 4437, independent conditional: 0, independent unconditional: 4437, dependent: 169, dependent conditional: 0, dependent unconditional: 169, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1840, independent: 1805, independent conditional: 0, independent unconditional: 1805, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4606, independent: 2632, independent conditional: 0, independent unconditional: 2632, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 1840, unknown conditional: 0, unknown unconditional: 1840] , Statistics on independence cache: Total cache size (in pairs): 155, Positive cache size: 139, Positive conditional cache size: 0, Positive unconditional cache size: 139, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 144 PlacesBefore, 43 PlacesAfterwards, 157 TransitionsBefore, 48 TransitionsAfterwards, 10648 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 71 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 38 ConcurrentYvCompositions, 8 ChoiceCompositions, 145 TotalNumberOfCompositions, 21022 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10523, independent: 10212, independent conditional: 0, independent unconditional: 10212, dependent: 311, dependent conditional: 0, dependent unconditional: 311, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5594, independent: 5530, independent conditional: 0, independent unconditional: 5530, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10523, independent: 4682, independent conditional: 0, independent unconditional: 4682, dependent: 247, dependent conditional: 0, dependent unconditional: 247, unknown: 5594, unknown conditional: 0, unknown unconditional: 5594] , Statistics on independence cache: Total cache size (in pairs): 253, Positive cache size: 226, Positive conditional cache size: 0, Positive unconditional cache size: 226, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 144 PlacesBefore, 43 PlacesAfterwards, 157 TransitionsBefore, 48 TransitionsAfterwards, 10648 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 38 ConcurrentYvCompositions, 8 ChoiceCompositions, 146 TotalNumberOfCompositions, 19993 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9573, independent: 9299, independent conditional: 0, independent unconditional: 9299, dependent: 274, dependent conditional: 0, dependent unconditional: 274, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5399, independent: 5333, independent conditional: 0, independent unconditional: 5333, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9573, independent: 3966, independent conditional: 0, independent unconditional: 3966, dependent: 208, dependent conditional: 0, dependent unconditional: 208, unknown: 5399, unknown conditional: 0, unknown unconditional: 5399] , Statistics on independence cache: Total cache size (in pairs): 152, Positive cache size: 124, Positive conditional cache size: 0, Positive unconditional cache size: 124, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 140 locations, 5 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: 2.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 178 locations, 7 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: 3.3s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 85 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 73 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 136 IncrementalHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 7 mSDtfsCounter, 136 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 178 locations, 7 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: 5.5s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 905 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 611 mSDsluCounter, 230 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 120 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1880 IncrementalHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 120 mSolverCounterUnsat, 112 mSDtfsCounter, 1880 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1338occurred in iteration=10, InterpolantAutomatonStates: 61, 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, 0.7s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 274 ConstructedInterpolants, 0 QuantifiedInterpolants, 608 SizeOfPredicates, 4 NumberOfNonLiveVariables, 300 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 84/91 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! [2023-08-03 22:10:07,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...