/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:17:06,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:17:06,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:17:06,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:17:06,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:17:06,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:17:06,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:17:06,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:17:06,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:17:06,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:17:06,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:17:06,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:17:06,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:17:06,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:17:06,906 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:17:06,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:17:06,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:17:06,907 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:17:06,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:17:06,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:17:06,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:17:06,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:17:06,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:17:06,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:17:06,908 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:17:06,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:17:06,909 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:17:06,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:17:06,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:17:06,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:17:06,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:17:06,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:17:06,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:17:06,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:17:06,913 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:17:06,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:17:07,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:17:07,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:17:07,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:17:07,184 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:17:07,184 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:17:07,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i [2023-08-03 19:17:08,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:17:08,562 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:17:08,563 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i [2023-08-03 19:17:08,581 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789992ba3/adbe4d750ff944efb0afb214cbb66c6e/FLAG23036bc51 [2023-08-03 19:17:08,592 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789992ba3/adbe4d750ff944efb0afb214cbb66c6e [2023-08-03 19:17:08,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:17:08,595 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:17:08,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:17:08,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:17:08,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:17:08,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:17:08" (1/1) ... [2023-08-03 19:17:08,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8c46e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:08, skipping insertion in model container [2023-08-03 19:17:08,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:17:08" (1/1) ... [2023-08-03 19:17:08,632 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:17:08,994 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i[42166,42179] [2023-08-03 19:17:08,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:17:09,007 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:17:09,019 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [133] [2023-08-03 19:17:09,032 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [495] [2023-08-03 19:17:09,032 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [495] [2023-08-03 19:17:09,046 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i[42166,42179] [2023-08-03 19:17:09,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:17:09,093 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:17:09,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09 WrapperNode [2023-08-03 19:17:09,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:17:09,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:17:09,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:17:09,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:17:09,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,149 INFO L138 Inliner]: procedures = 268, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 105 [2023-08-03 19:17:09,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:17:09,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:17:09,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:17:09,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:17:09,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,180 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:17:09,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:17:09,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:17:09,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:17:09,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (1/1) ... [2023-08-03 19:17:09,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:17:09,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:09,209 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 19:17:09,211 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 19:17:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:17:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:17:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:17:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 19:17:09,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 19:17:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 19:17:09,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 19:17:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:17:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:17:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:17:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:17:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:17:09,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:17:09,246 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 19:17:09,353 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:17:09,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:17:09,567 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:17:09,574 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:17:09,574 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:17:09,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:17:09 BoogieIcfgContainer [2023-08-03 19:17:09,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:17:09,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:17:09,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:17:09,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:17:09,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:17:08" (1/3) ... [2023-08-03 19:17:09,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528fed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:17:09, skipping insertion in model container [2023-08-03 19:17:09,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:09" (2/3) ... [2023-08-03 19:17:09,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528fed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:17:09, skipping insertion in model container [2023-08-03 19:17:09,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:17:09" (3/3) ... [2023-08-03 19:17:09,585 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_sync01_bound2.i [2023-08-03 19:17:09,590 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:17:09,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:17:09,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:17:09,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:17:09,651 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:17:09,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,789 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-03 19:17:09,790 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:17:09,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-03 19:17:09,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:17:09,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,812 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-03 19:17:09,859 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-03 19:17:09,860 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:17:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-03 19:17:09,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-03 19:17:13,713 INFO L134 LiptonReduction]: Checked pairs total: 9588 [2023-08-03 19:17:13,714 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-03 19:17:13,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:17:13,732 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;@243e9b4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:17:13,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:17:13,736 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:17:13,736 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 19:17:13,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:13,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:13,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 19:17:13,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:13,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash 466129893, now seen corresponding path program 1 times [2023-08-03 19:17:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:13,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993406479] [2023-08-03 19:17:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:13,945 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 19:17:13,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993406479] [2023-08-03 19:17:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993406479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:13,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:13,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963667713] [2023-08-03 19:17:13,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:13,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:14,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-03 19:17:14,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 19:17:14,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:14,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-03 19:17:14,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:14,125 INFO L124 PetriNetUnfolderBase]: 372/736 cut-off events. [2023-08-03 19:17:14,125 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-03 19:17:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 736 events. 372/736 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3768 event pairs, 120 based on Foata normal form. 93/673 useless extension candidates. Maximal degree in co-relation 1188. Up to 604 conditions per place. [2023-08-03 19:17:14,131 INFO L140 encePairwiseOnDemand]: 232/237 looper letters, 30 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-03 19:17:14,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2023-08-03 19:17:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-03 19:17:14,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372714486638537 [2023-08-03 19:17:14,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-03 19:17:14,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-03 19:17:14,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:14,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-03 19:17:14,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 19:17:14,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 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 19:17:14,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 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 19:17:14,157 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 106 flow. Second operand 3 states and 382 transitions. [2023-08-03 19:17:14,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2023-08-03 19:17:14,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:14,161 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 108 flow [2023-08-03 19:17:14,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-03 19:17:14,165 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-03 19:17:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 108 flow [2023-08-03 19:17:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 19:17:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:17:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:17:14,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:14,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1584616022, now seen corresponding path program 1 times [2023-08-03 19:17:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:14,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645346961] [2023-08-03 19:17:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:17:14,197 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:17:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:17:14,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:17:14,229 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:17:14,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:17:14,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:17:14,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:17:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:17:14,233 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:17:14,234 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:17:14,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:17:14,278 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:17:14,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,391 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-03 19:17:14,392 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-03 19:17:14,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4293 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-03 19:17:14,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:17:14,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-03 19:17:14,508 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-03 19:17:14,508 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-03 19:17:14,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4293 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-03 19:17:14,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 9420 [2023-08-03 19:17:18,240 INFO L134 LiptonReduction]: Checked pairs total: 32304 [2023-08-03 19:17:18,240 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-03 19:17:18,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:17:18,243 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;@243e9b4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:17:18,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:17:18,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:17:18,245 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 19:17:18,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:18,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:18,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 19:17:18,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:18,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 772339598, now seen corresponding path program 1 times [2023-08-03 19:17:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:18,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789919128] [2023-08-03 19:17:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:18,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:18,323 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 19:17:18,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:18,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789919128] [2023-08-03 19:17:18,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789919128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:18,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:18,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071851547] [2023-08-03 19:17:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:18,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-03 19:17:18,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 19:17:18,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:18,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-03 19:17:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:20,592 INFO L124 PetriNetUnfolderBase]: 18932/28305 cut-off events. [2023-08-03 19:17:20,593 INFO L125 PetriNetUnfolderBase]: For 1964/1964 co-relation queries the response was YES. [2023-08-03 19:17:20,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54431 conditions, 28305 events. 18932/28305 cut-off events. For 1964/1964 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 192625 event pairs, 9956 based on Foata normal form. 4613/28951 useless extension candidates. Maximal degree in co-relation 14014. Up to 24716 conditions per place. [2023-08-03 19:17:20,793 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 45 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-03 19:17:20,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 284 flow [2023-08-03 19:17:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-03 19:17:20,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2023-08-03 19:17:20,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-03 19:17:20,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-03 19:17:20,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:20,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-03 19:17:20,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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 19:17:20,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:20,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:20,806 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 184 flow. Second operand 3 states and 483 transitions. [2023-08-03 19:17:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 284 flow [2023-08-03 19:17:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:20,812 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 186 flow [2023-08-03 19:17:20,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-03 19:17:20,813 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 19:17:20,813 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 186 flow [2023-08-03 19:17:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 19:17:20,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:20,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 19:17:20,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:20,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash -975590603, now seen corresponding path program 1 times [2023-08-03 19:17:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:20,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303128432] [2023-08-03 19:17:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:20,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:20,927 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 19:17:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303128432] [2023-08-03 19:17:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303128432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937780176] [2023-08-03 19:17:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:20,935 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 19:17:20,941 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 19:17:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:21,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:17:21,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:17:21,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937780176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:21,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:21,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:17:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825851861] [2023-08-03 19:17:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:21,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:21,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-03 19:17:21,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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 19:17:21,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:21,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-03 19:17:21,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:22,945 INFO L124 PetriNetUnfolderBase]: 16912/24566 cut-off events. [2023-08-03 19:17:22,945 INFO L125 PetriNetUnfolderBase]: For 1729/1729 co-relation queries the response was YES. [2023-08-03 19:17:23,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48116 conditions, 24566 events. 16912/24566 cut-off events. For 1729/1729 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 157246 event pairs, 10820 based on Foata normal form. 0/21748 useless extension candidates. Maximal degree in co-relation 48070. Up to 21722 conditions per place. [2023-08-03 19:17:23,150 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 54 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-03 19:17:23,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 326 flow [2023-08-03 19:17:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-03 19:17:23,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632984901277585 [2023-08-03 19:17:23,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-03 19:17:23,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-03 19:17:23,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:23,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-03 19:17:23,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 19:17:23,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:23,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:23,156 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 186 flow. Second operand 3 states and 485 transitions. [2023-08-03 19:17:23,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 326 flow [2023-08-03 19:17:23,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:23,164 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 196 flow [2023-08-03 19:17:23,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-08-03 19:17:23,167 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-03 19:17:23,167 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 196 flow [2023-08-03 19:17:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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 19:17:23,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:23,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:17:23,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:23,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:23,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:23,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -629918540, now seen corresponding path program 1 times [2023-08-03 19:17:23,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:23,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703841434] [2023-08-03 19:17:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:23,462 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 19:17:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703841434] [2023-08-03 19:17:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703841434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390969862] [2023-08-03 19:17:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:23,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:23,470 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 19:17:23,478 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 19:17:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:23,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:17:23,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:23,607 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 19:17:23,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390969862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:23,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:23,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:17:23,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395866061] [2023-08-03 19:17:23,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:23,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:23,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:23,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:17:23,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-03 19:17:23,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 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 19:17:23,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:23,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-03 19:17:23,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:25,202 INFO L124 PetriNetUnfolderBase]: 16880/24230 cut-off events. [2023-08-03 19:17:25,203 INFO L125 PetriNetUnfolderBase]: For 2528/2528 co-relation queries the response was YES. [2023-08-03 19:17:25,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48599 conditions, 24230 events. 16880/24230 cut-off events. For 2528/2528 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 151536 event pairs, 7827 based on Foata normal form. 16/21757 useless extension candidates. Maximal degree in co-relation 20694. Up to 21970 conditions per place. [2023-08-03 19:17:25,354 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 53 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-03 19:17:25,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 337 flow [2023-08-03 19:17:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:17:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:17:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2023-08-03 19:17:25,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344947735191637 [2023-08-03 19:17:25,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2023-08-03 19:17:25,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2023-08-03 19:17:25,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:25,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2023-08-03 19:17:25,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 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 19:17:25,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 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 19:17:25,363 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 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 19:17:25,363 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 196 flow. Second operand 5 states and 767 transitions. [2023-08-03 19:17:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 337 flow [2023-08-03 19:17:25,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 328 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:17:25,379 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 205 flow [2023-08-03 19:17:25,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-03 19:17:25,380 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 19:17:25,380 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 205 flow [2023-08-03 19:17:25,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 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 19:17:25,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:25,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:25,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:25,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:25,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 922704644, now seen corresponding path program 1 times [2023-08-03 19:17:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:25,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345003152] [2023-08-03 19:17:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:25,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:17:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345003152] [2023-08-03 19:17:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345003152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:25,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858234286] [2023-08-03 19:17:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:25,674 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 19:17:25,681 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 19:17:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:25,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:17:25,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:17:25,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858234286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:25,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:17:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546694753] [2023-08-03 19:17:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:25,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:25,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-03 19:17:25,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 19:17:25,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:25,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-03 19:17:25,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:27,080 INFO L124 PetriNetUnfolderBase]: 13744/20011 cut-off events. [2023-08-03 19:17:27,080 INFO L125 PetriNetUnfolderBase]: For 1878/1878 co-relation queries the response was YES. [2023-08-03 19:17:27,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40249 conditions, 20011 events. 13744/20011 cut-off events. For 1878/1878 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 123742 event pairs, 7008 based on Foata normal form. 0/18472 useless extension candidates. Maximal degree in co-relation 18770. Up to 13270 conditions per place. [2023-08-03 19:17:27,163 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 64 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-03 19:17:27,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 391 flow [2023-08-03 19:17:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-03 19:17:27,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725900116144018 [2023-08-03 19:17:27,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-03 19:17:27,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-03 19:17:27,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:27,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-03 19:17:27,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 19:17:27,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:27,169 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 205 flow. Second operand 3 states and 493 transitions. [2023-08-03 19:17:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 391 flow [2023-08-03 19:17:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:17:27,173 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 210 flow [2023-08-03 19:17:27,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2023-08-03 19:17:27,174 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 19:17:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 210 flow [2023-08-03 19:17:27,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 19:17:27,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:27,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:27,183 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 19:17:27,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:27,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:27,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1002742314, now seen corresponding path program 1 times [2023-08-03 19:17:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853272180] [2023-08-03 19:17:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853272180] [2023-08-03 19:17:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853272180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000512850] [2023-08-03 19:17:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:27,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:27,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 19:17:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:27,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:17:27,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:27,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:27,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000512850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:27,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:17:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320666582] [2023-08-03 19:17:27,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:27,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:27,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-03 19:17:27,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 19:17:27,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-03 19:17:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:28,772 INFO L124 PetriNetUnfolderBase]: 12548/18363 cut-off events. [2023-08-03 19:17:28,772 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2023-08-03 19:17:28,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38039 conditions, 18363 events. 12548/18363 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 112029 event pairs, 5936 based on Foata normal form. 4/17359 useless extension candidates. Maximal degree in co-relation 13945. Up to 16543 conditions per place. [2023-08-03 19:17:28,858 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 54 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-03 19:17:28,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 344 flow [2023-08-03 19:17:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-03 19:17:28,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2023-08-03 19:17:28,862 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-03 19:17:28,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-03 19:17:28,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:28,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-03 19:17:28,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 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 19:17:28,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:28,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:28,870 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 210 flow. Second operand 4 states and 624 transitions. [2023-08-03 19:17:28,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 344 flow [2023-08-03 19:17:28,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:28,882 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 206 flow [2023-08-03 19:17:28,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-08-03 19:17:28,884 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 19:17:28,884 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 206 flow [2023-08-03 19:17:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 19:17:28,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:28,884 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:28,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:29,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:29,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1084835390, now seen corresponding path program 1 times [2023-08-03 19:17:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743602633] [2023-08-03 19:17:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743602633] [2023-08-03 19:17:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743602633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092899765] [2023-08-03 19:17:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:29,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:29,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:29,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:29,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 19:17:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:29,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:17:29,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:29,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092899765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:29,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:29,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:17:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060784397] [2023-08-03 19:17:29,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:29,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:17:29,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-03 19:17:29,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 19:17:29,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:29,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-03 19:17:29,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:30,161 INFO L124 PetriNetUnfolderBase]: 11524/16150 cut-off events. [2023-08-03 19:17:30,161 INFO L125 PetriNetUnfolderBase]: For 2340/2340 co-relation queries the response was YES. [2023-08-03 19:17:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34167 conditions, 16150 events. 11524/16150 cut-off events. For 2340/2340 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 89455 event pairs, 1334 based on Foata normal form. 256/15907 useless extension candidates. Maximal degree in co-relation 18845. Up to 13310 conditions per place. [2023-08-03 19:17:30,235 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 78 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-03 19:17:30,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 444 flow [2023-08-03 19:17:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:17:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:17:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 791 transitions. [2023-08-03 19:17:30,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2023-08-03 19:17:30,238 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 791 transitions. [2023-08-03 19:17:30,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 791 transitions. [2023-08-03 19:17:30,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:30,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 791 transitions. [2023-08-03 19:17:30,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 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 19:17:30,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 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 19:17:30,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 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 19:17:30,243 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 206 flow. Second operand 5 states and 791 transitions. [2023-08-03 19:17:30,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 444 flow [2023-08-03 19:17:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 432 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 19:17:30,259 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 211 flow [2023-08-03 19:17:30,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-08-03 19:17:30,260 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 19:17:30,260 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 211 flow [2023-08-03 19:17:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 19:17:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:30,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:30,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:30,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:30,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:30,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash -202435917, now seen corresponding path program 1 times [2023-08-03 19:17:30,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:30,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753176886] [2023-08-03 19:17:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:30,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:17:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753176886] [2023-08-03 19:17:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753176886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:30,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626909574] [2023-08-03 19:17:30,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:30,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:30,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 287 [2023-08-03 19:17:30,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 19:17:30,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:30,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 287 [2023-08-03 19:17:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:31,727 INFO L124 PetriNetUnfolderBase]: 16171/23280 cut-off events. [2023-08-03 19:17:31,727 INFO L125 PetriNetUnfolderBase]: For 7660/7660 co-relation queries the response was YES. [2023-08-03 19:17:31,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49923 conditions, 23280 events. 16171/23280 cut-off events. For 7660/7660 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 139061 event pairs, 7849 based on Foata normal form. 207/22820 useless extension candidates. Maximal degree in co-relation 41116. Up to 21346 conditions per place. [2023-08-03 19:17:31,988 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 61 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-03 19:17:31,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 399 flow [2023-08-03 19:17:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-03 19:17:31,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423925667828107 [2023-08-03 19:17:31,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-03 19:17:31,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-03 19:17:31,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:31,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-03 19:17:31,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 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 19:17:31,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:31,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:31,993 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 211 flow. Second operand 3 states and 467 transitions. [2023-08-03 19:17:31,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 399 flow [2023-08-03 19:17:32,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 80 transitions, 387 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-03 19:17:32,007 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 229 flow [2023-08-03 19:17:32,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-03 19:17:32,008 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 19:17:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 229 flow [2023-08-03 19:17:32,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 19:17:32,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:32,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 19:17:32,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:32,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -755672888, now seen corresponding path program 1 times [2023-08-03 19:17:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093851230] [2023-08-03 19:17:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:17:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093851230] [2023-08-03 19:17:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093851230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422481021] [2023-08-03 19:17:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:32,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:32,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 19:17:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:32,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:17:32,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:32,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422481021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:32,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 19:17:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756044780] [2023-08-03 19:17:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:32,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-03 19:17:32,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 19:17:32,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:32,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-03 19:17:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:33,403 INFO L124 PetriNetUnfolderBase]: 11833/17342 cut-off events. [2023-08-03 19:17:33,403 INFO L125 PetriNetUnfolderBase]: For 5651/6297 co-relation queries the response was YES. [2023-08-03 19:17:33,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38553 conditions, 17342 events. 11833/17342 cut-off events. For 5651/6297 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 107338 event pairs, 6498 based on Foata normal form. 0/16401 useless extension candidates. Maximal degree in co-relation 31609. Up to 12446 conditions per place. [2023-08-03 19:17:33,479 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 67 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-03 19:17:33,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 423 flow [2023-08-03 19:17:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-03 19:17:33,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725900116144018 [2023-08-03 19:17:33,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-03 19:17:33,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-03 19:17:33,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:33,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-03 19:17:33,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 19:17:33,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:33,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:33,484 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 229 flow. Second operand 3 states and 493 transitions. [2023-08-03 19:17:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 423 flow [2023-08-03 19:17:33,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:33,497 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 238 flow [2023-08-03 19:17:33,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-08-03 19:17:33,498 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 19:17:33,498 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 238 flow [2023-08-03 19:17:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 19:17:33,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:33,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:33,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:33,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:33,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash -756992468, now seen corresponding path program 1 times [2023-08-03 19:17:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:33,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604238798] [2023-08-03 19:17:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:33,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604238798] [2023-08-03 19:17:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604238798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980037237] [2023-08-03 19:17:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:33,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:33,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:33,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 19:17:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:17:33,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:33,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:17:33,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980037237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:33,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:17:33,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470529110] [2023-08-03 19:17:33,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:33,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:33,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-03 19:17:33,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 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 19:17:33,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:33,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-03 19:17:33,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:35,060 INFO L124 PetriNetUnfolderBase]: 11645/16990 cut-off events. [2023-08-03 19:17:35,060 INFO L125 PetriNetUnfolderBase]: For 4673/5685 co-relation queries the response was YES. [2023-08-03 19:17:35,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38295 conditions, 16990 events. 11645/16990 cut-off events. For 4673/5685 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 102291 event pairs, 2299 based on Foata normal form. 44/16412 useless extension candidates. Maximal degree in co-relation 31527. Up to 14380 conditions per place. [2023-08-03 19:17:35,164 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 74 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2023-08-03 19:17:35,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 456 flow [2023-08-03 19:17:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-03 19:17:35,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566202090592335 [2023-08-03 19:17:35,166 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-03 19:17:35,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-03 19:17:35,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:35,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-03 19:17:35,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 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 19:17:35,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:35,170 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:35,170 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 238 flow. Second operand 4 states and 639 transitions. [2023-08-03 19:17:35,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 456 flow [2023-08-03 19:17:35,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:35,303 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 234 flow [2023-08-03 19:17:35,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-08-03 19:17:35,304 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-03 19:17:35,304 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 234 flow [2023-08-03 19:17:35,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 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 19:17:35,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:35,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:35,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:35,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:35,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1591939428, now seen corresponding path program 1 times [2023-08-03 19:17:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:35,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125496241] [2023-08-03 19:17:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:35,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:35,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125496241] [2023-08-03 19:17:35,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125496241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:35,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:35,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 19:17:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168587747] [2023-08-03 19:17:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:35,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:35,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-03 19:17:35,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 19:17:35,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:35,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-03 19:17:35,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:36,467 INFO L124 PetriNetUnfolderBase]: 5077/10850 cut-off events. [2023-08-03 19:17:36,467 INFO L125 PetriNetUnfolderBase]: For 4594/4666 co-relation queries the response was YES. [2023-08-03 19:17:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 10850 events. 5077/10850 cut-off events. For 4594/4666 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 94296 event pairs, 1103 based on Foata normal form. 2136/12924 useless extension candidates. Maximal degree in co-relation 14705. Up to 4975 conditions per place. [2023-08-03 19:17:36,525 INFO L140 encePairwiseOnDemand]: 271/287 looper letters, 62 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2023-08-03 19:17:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 521 flow [2023-08-03 19:17:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-03 19:17:36,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537746806039489 [2023-08-03 19:17:36,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-03 19:17:36,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-03 19:17:36,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:36,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-03 19:17:36,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 19:17:36,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:36,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 19:17:36,530 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 234 flow. Second operand 3 states and 463 transitions. [2023-08-03 19:17:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 521 flow [2023-08-03 19:17:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:17:36,554 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 260 flow [2023-08-03 19:17:36,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-08-03 19:17:36,555 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2023-08-03 19:17:36,555 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 260 flow [2023-08-03 19:17:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 19:17:36,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:36,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:36,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 19:17:36,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:36,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1635818700, now seen corresponding path program 2 times [2023-08-03 19:17:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015026721] [2023-08-03 19:17:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:17:36,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:36,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015026721] [2023-08-03 19:17:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015026721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:36,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887542777] [2023-08-03 19:17:36,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:17:36,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:36,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:36,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:36,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 19:17:36,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:17:36,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:36,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:17:36,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:17:36,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:17:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887542777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:36,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:17:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568784348] [2023-08-03 19:17:36,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:36,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:36,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-03 19:17:36,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 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 19:17:36,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:36,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-03 19:17:36,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:37,277 INFO L124 PetriNetUnfolderBase]: 3199/6210 cut-off events. [2023-08-03 19:17:37,278 INFO L125 PetriNetUnfolderBase]: For 4420/4611 co-relation queries the response was YES. [2023-08-03 19:17:37,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16350 conditions, 6210 events. 3199/6210 cut-off events. For 4420/4611 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 44999 event pairs, 779 based on Foata normal form. 228/6379 useless extension candidates. Maximal degree in co-relation 13995. Up to 2026 conditions per place. [2023-08-03 19:17:37,301 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 83 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-03 19:17:37,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 582 flow [2023-08-03 19:17:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-03 19:17:37,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653310104529616 [2023-08-03 19:17:37,303 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-03 19:17:37,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-03 19:17:37,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:37,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-03 19:17:37,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 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 19:17:37,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:37,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 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 19:17:37,307 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 260 flow. Second operand 4 states and 649 transitions. [2023-08-03 19:17:37,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 582 flow [2023-08-03 19:17:37,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:37,324 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 264 flow [2023-08-03 19:17:37,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-03 19:17:37,325 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-08-03 19:17:37,325 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 264 flow [2023-08-03 19:17:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 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 19:17:37,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:37,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:37,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 19:17:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 19:17:37,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:37,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1048564471, now seen corresponding path program 1 times [2023-08-03 19:17:37,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:37,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750220666] [2023-08-03 19:17:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:17:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750220666] [2023-08-03 19:17:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750220666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:37,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315531889] [2023-08-03 19:17:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:37,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:37,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:37,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 19:17:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:37,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 19:17:37,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:17:37,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:17:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315531889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:37,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:37,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 8 [2023-08-03 19:17:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126783608] [2023-08-03 19:17:37,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:37,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:17:37,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:17:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:17:37,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2023-08-03 19:17:37,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 264 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 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 19:17:37,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:37,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2023-08-03 19:17:37,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:39,325 INFO L124 PetriNetUnfolderBase]: 7801/14852 cut-off events. [2023-08-03 19:17:39,325 INFO L125 PetriNetUnfolderBase]: For 17557/17557 co-relation queries the response was YES. [2023-08-03 19:17:39,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40655 conditions, 14852 events. 7801/14852 cut-off events. For 17557/17557 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 118523 event pairs, 2218 based on Foata normal form. 651/15486 useless extension candidates. Maximal degree in co-relation 34457. Up to 4250 conditions per place. [2023-08-03 19:17:39,378 INFO L140 encePairwiseOnDemand]: 268/287 looper letters, 241 selfloop transitions, 54 changer transitions 15/320 dead transitions. [2023-08-03 19:17:39,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 320 transitions, 1790 flow [2023-08-03 19:17:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 19:17:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 19:17:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2277 transitions. [2023-08-03 19:17:39,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958623693379791 [2023-08-03 19:17:39,383 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2277 transitions. [2023-08-03 19:17:39,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2277 transitions. [2023-08-03 19:17:39,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:39,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2277 transitions. [2023-08-03 19:17:39,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.3125) internal successors, (2277), 16 states have internal predecessors, (2277), 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 19:17:39,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 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 19:17:39,395 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 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 19:17:39,395 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 264 flow. Second operand 16 states and 2277 transitions. [2023-08-03 19:17:39,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 320 transitions, 1790 flow [2023-08-03 19:17:39,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 320 transitions, 1770 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:39,464 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 744 flow [2023-08-03 19:17:39,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=744, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2023-08-03 19:17:39,465 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 46 predicate places. [2023-08-03 19:17:39,465 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 744 flow [2023-08-03 19:17:39,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 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 19:17:39,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:39,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:39,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 19:17:39,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 19:17:39,666 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:39,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1797395629, now seen corresponding path program 1 times [2023-08-03 19:17:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:39,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030930275] [2023-08-03 19:17:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:39,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:17:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030930275] [2023-08-03 19:17:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030930275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414806710] [2023-08-03 19:17:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:39,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:40,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 19:17:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:40,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-03 19:17:40,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:17:40,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414806710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:40,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-03 19:17:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297816227] [2023-08-03 19:17:40,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:40,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 19:17:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 19:17:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-03 19:17:40,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2023-08-03 19:17:40,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 744 flow. Second operand has 10 states, 10 states have (on average 127.2) internal successors, (1272), 10 states have internal predecessors, (1272), 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 19:17:40,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:40,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2023-08-03 19:17:40,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:41,669 INFO L124 PetriNetUnfolderBase]: 5982/11579 cut-off events. [2023-08-03 19:17:41,669 INFO L125 PetriNetUnfolderBase]: For 26888/26888 co-relation queries the response was YES. [2023-08-03 19:17:41,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39861 conditions, 11579 events. 5982/11579 cut-off events. For 26888/26888 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 90328 event pairs, 1364 based on Foata normal form. 353/11928 useless extension candidates. Maximal degree in co-relation 38700. Up to 3482 conditions per place. [2023-08-03 19:17:41,741 INFO L140 encePairwiseOnDemand]: 269/287 looper letters, 160 selfloop transitions, 28 changer transitions 97/293 dead transitions. [2023-08-03 19:17:41,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 293 transitions, 2346 flow [2023-08-03 19:17:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 19:17:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 19:17:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1690 transitions. [2023-08-03 19:17:41,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907084785133566 [2023-08-03 19:17:41,746 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1690 transitions. [2023-08-03 19:17:41,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1690 transitions. [2023-08-03 19:17:41,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:41,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1690 transitions. [2023-08-03 19:17:41,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 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 19:17:41,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 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 19:17:41,755 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 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 19:17:41,755 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 744 flow. Second operand 12 states and 1690 transitions. [2023-08-03 19:17:41,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 293 transitions, 2346 flow [2023-08-03 19:17:41,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 293 transitions, 2259 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:41,889 INFO L231 Difference]: Finished difference. Result has 119 places, 94 transitions, 648 flow [2023-08-03 19:17:41,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=648, PETRI_PLACES=119, PETRI_TRANSITIONS=94} [2023-08-03 19:17:41,890 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 58 predicate places. [2023-08-03 19:17:41,890 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 94 transitions, 648 flow [2023-08-03 19:17:41,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 127.2) internal successors, (1272), 10 states have internal predecessors, (1272), 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 19:17:41,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:41,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:41,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 19:17:42,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:42,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1785256651, now seen corresponding path program 2 times [2023-08-03 19:17:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741474031] [2023-08-03 19:17:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:17:42,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741474031] [2023-08-03 19:17:42,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741474031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241589291] [2023-08-03 19:17:42,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:17:42,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:42,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:17:42,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 19:17:42,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:17:42,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:42,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-03 19:17:42,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:17:42,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241589291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:42,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:42,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-03 19:17:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242692463] [2023-08-03 19:17:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:42,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 19:17:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 19:17:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-03 19:17:42,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2023-08-03 19:17:42,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 94 transitions, 648 flow. Second operand has 10 states, 10 states have (on average 127.2) internal successors, (1272), 10 states have internal predecessors, (1272), 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 19:17:42,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:42,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2023-08-03 19:17:42,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:43,538 INFO L124 PetriNetUnfolderBase]: 2463/4969 cut-off events. [2023-08-03 19:17:43,539 INFO L125 PetriNetUnfolderBase]: For 12158/12158 co-relation queries the response was YES. [2023-08-03 19:17:43,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17653 conditions, 4969 events. 2463/4969 cut-off events. For 12158/12158 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 33885 event pairs, 680 based on Foata normal form. 2/4967 useless extension candidates. Maximal degree in co-relation 17618. Up to 1228 conditions per place. [2023-08-03 19:17:43,560 INFO L140 encePairwiseOnDemand]: 273/287 looper letters, 0 selfloop transitions, 0 changer transitions 218/218 dead transitions. [2023-08-03 19:17:43,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 218 transitions, 1750 flow [2023-08-03 19:17:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 19:17:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 19:17:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1643 transitions. [2023-08-03 19:17:43,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47706155632984903 [2023-08-03 19:17:43,564 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1643 transitions. [2023-08-03 19:17:43,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1643 transitions. [2023-08-03 19:17:43,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:43,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1643 transitions. [2023-08-03 19:17:43,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 136.91666666666666) internal successors, (1643), 12 states have internal predecessors, (1643), 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 19:17:43,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 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 19:17:43,577 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 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 19:17:43,577 INFO L175 Difference]: Start difference. First operand has 119 places, 94 transitions, 648 flow. Second operand 12 states and 1643 transitions. [2023-08-03 19:17:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 218 transitions, 1750 flow [2023-08-03 19:17:43,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 218 transitions, 1635 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-03 19:17:43,625 INFO L231 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2023-08-03 19:17:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2023-08-03 19:17:43,625 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 55 predicate places. [2023-08-03 19:17:43,626 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2023-08-03 19:17:43,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 127.2) internal successors, (1272), 10 states have internal predecessors, (1272), 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 19:17:43,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 19:17:43,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 19:17:43,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:17:43,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:43,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 19:17:43,832 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:43,834 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 19:17:43,834 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 19:17:43,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 07:17:43 BasicIcfg [2023-08-03 19:17:43,838 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 19:17:43,839 INFO L158 Benchmark]: Toolchain (without parser) took 35243.41ms. Allocated memory was 585.1MB in the beginning and 9.5GB in the end (delta: 8.9GB). Free memory was 529.4MB in the beginning and 7.2GB in the end (delta: -6.7GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2023-08-03 19:17:43,839 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:17:43,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 497.60ms. Allocated memory is still 585.1MB. Free memory was 529.0MB in the beginning and 500.5MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-03 19:17:43,840 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.64ms. Allocated memory is still 585.1MB. Free memory was 500.5MB in the beginning and 498.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 19:17:43,840 INFO L158 Benchmark]: Boogie Preprocessor took 32.66ms. Allocated memory is still 585.1MB. Free memory was 498.0MB in the beginning and 496.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:17:43,840 INFO L158 Benchmark]: RCFGBuilder took 392.48ms. Allocated memory is still 585.1MB. Free memory was 496.3MB in the beginning and 479.9MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-03 19:17:43,840 INFO L158 Benchmark]: TraceAbstraction took 34261.18ms. Allocated memory was 585.1MB in the beginning and 9.5GB in the end (delta: 8.9GB). Free memory was 479.1MB in the beginning and 7.2GB in the end (delta: -6.8GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2023-08-03 19:17:43,843 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 497.60ms. Allocated memory is still 585.1MB. Free memory was 529.0MB in the beginning and 500.5MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 54.64ms. Allocated memory is still 585.1MB. Free memory was 500.5MB in the beginning and 498.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.66ms. Allocated memory is still 585.1MB. Free memory was 498.0MB in the beginning and 496.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 392.48ms. Allocated memory is still 585.1MB. Free memory was 496.3MB in the beginning and 479.9MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 34261.18ms. Allocated memory was 585.1MB in the beginning and 9.5GB in the end (delta: 8.9GB). Free memory was 479.1MB in the beginning and 7.2GB in the end (delta: -6.8GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 133]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [133] - GenericResultAtLocation [Line: 495]: Unsoundness Warning unspecified type, defaulting to int C: short [495] - GenericResultAtLocation [Line: 495]: Unsoundness Warning unspecified type, defaulting to int C: short [495] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 125 PlacesBefore, 39 PlacesAfterwards, 133 TransitionsBefore, 42 TransitionsAfterwards, 3510 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 5 ChoiceCompositions, 104 TotalNumberOfCompositions, 9588 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5208, independent: 5025, independent conditional: 0, independent unconditional: 5025, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1955, independent: 1915, independent conditional: 0, independent unconditional: 1915, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5208, independent: 3110, independent conditional: 0, independent unconditional: 3110, dependent: 143, dependent conditional: 0, dependent unconditional: 143, unknown: 1955, unknown conditional: 0, unknown unconditional: 1955] , Statistics on independence cache: Total cache size (in pairs): 229, Positive cache size: 213, Positive conditional cache size: 0, Positive unconditional cache size: 213, 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: 3.8s, 157 PlacesBefore, 61 PlacesAfterwards, 169 TransitionsBefore, 68 TransitionsAfterwards, 9420 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 32304 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16366, independent: 16003, independent conditional: 0, independent unconditional: 16003, dependent: 363, dependent conditional: 0, dependent unconditional: 363, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4925, independent: 4843, independent conditional: 0, independent unconditional: 4843, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 16366, independent: 11160, independent conditional: 0, independent unconditional: 11160, dependent: 281, dependent conditional: 0, dependent unconditional: 281, unknown: 4925, unknown conditional: 0, unknown unconditional: 4925] , Statistics on independence cache: Total cache size (in pairs): 741, Positive cache size: 706, Positive conditional cache size: 0, Positive unconditional cache size: 706, Negative cache size: 35, Negative conditional cache size: 0, Negative unconditional cache size: 35, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 966]: 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 with 1 thread instances CFG has 5 procedures, 149 locations, 3 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: 4.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62 IncrementalHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 62 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=1, InterpolantAutomatonStates: 3, 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, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 with 2 thread instances CFG has 7 procedures, 177 locations, 3 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: 29.5s, OverallIterations: 14, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1172 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1010 mSDsluCounter, 370 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 327 mSDsCounter, 131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4076 IncrementalHoareTripleChecker+Invalid, 4207 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 131 mSolverCounterUnsat, 43 mSDtfsCounter, 4076 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 547 GetRequests, 451 SyntacticMatches, 21 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=744occurred in iteration=12, InterpolantAutomatonStates: 80, 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: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 732 NumberOfCodeBlocks, 732 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 841 ConstructedInterpolants, 0 QuantifiedInterpolants, 1731 SizeOfPredicates, 10 NumberOfNonLiveVariables, 2519 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 29 InterpolantComputations, 10 PerfectInterpolantSequences, 291/326 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 19:17:43,877 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...