/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_stack_longest-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:14:05,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:14:05,827 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:14:05,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:14:05,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:14:05,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:14:05,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:14:05,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:14:05,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:14:05,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:14:05,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:14:05,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:14:05,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:14:05,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:14:05,881 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:14:05,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:14:05,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:14:05,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:14:05,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:14:05,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:14:05,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:14:05,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:14:05,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:14:05,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:14:05,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:14:05,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:14:05,886 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:14:05,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:14:05,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:14:05,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:14:05,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:14:05,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:14:05,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:14:05,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:14:05,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:14:05,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:14:05,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:14:05,888 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:14:05,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:14:05,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:14:05,889 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:14:05,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:14:06,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:14:06,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:14:06,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:14:06,108 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:14:06,109 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:14:06,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-1_bound2.i [2023-08-03 19:14:07,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:14:07,442 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:14:07,443 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-1_bound2.i [2023-08-03 19:14:07,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc3fefa1/c96ea9f4fd0f4e0cb3fbbbf7f65f960e/FLAG023205591 [2023-08-03 19:14:07,493 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc3fefa1/c96ea9f4fd0f4e0cb3fbbbf7f65f960e [2023-08-03 19:14:07,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:14:07,497 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:14:07,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:14:07,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:14:07,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:14:07,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:14:07" (1/1) ... [2023-08-03 19:14:07,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fadf5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:07, skipping insertion in model container [2023-08-03 19:14:07,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:14:07" (1/1) ... [2023-08-03 19:14:07,549 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:14:07,948 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_stack_longest-1_bound2.i[41530,41543] [2023-08-03 19:14:07,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:14:07,992 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:14:08,020 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:14:08,022 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:14:08,028 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-03 19:14:08,043 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_stack_longest-1_bound2.i[41530,41543] [2023-08-03 19:14:08,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:14:08,123 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:14:08,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08 WrapperNode [2023-08-03 19:14:08,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:14:08,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:14:08,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:14:08,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:14:08,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,178 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 188 [2023-08-03 19:14:08,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:14:08,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:14:08,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:14:08,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:14:08,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,206 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:14:08,209 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:14:08,209 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:14:08,209 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:14:08,210 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (1/1) ... [2023-08-03 19:14:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:14:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:14:08,242 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 19:14:08,248 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 19:14:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:14:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:14:08,275 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:14:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:14:08,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:14:08,277 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 19:14:08,387 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:14:08,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:14:08,624 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:14:08,632 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:14:08,632 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:14:08,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:14:08 BoogieIcfgContainer [2023-08-03 19:14:08,634 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:14:08,637 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:14:08,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:14:08,641 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:14:08,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:14:07" (1/3) ... [2023-08-03 19:14:08,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752b7b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:14:08, skipping insertion in model container [2023-08-03 19:14:08,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:08" (2/3) ... [2023-08-03 19:14:08,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752b7b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:14:08, skipping insertion in model container [2023-08-03 19:14:08,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:14:08" (3/3) ... [2023-08-03 19:14:08,643 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longest-1_bound2.i [2023-08-03 19:14:08,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:14:08,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:14:08,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 19:14:08,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:14:08,752 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:14:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,867 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-03 19:14:08,867 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:14:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1450 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-03 19:14:08,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:14:08,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,895 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-03 19:14:08,963 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-03 19:14:08,963 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:14:08,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1450 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-03 19:14:08,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-03 19:14:12,546 INFO L134 LiptonReduction]: Checked pairs total: 22758 [2023-08-03 19:14:12,547 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-03 19:14:12,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:14:12,564 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;@7111dfdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:14:12,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 19:14:12,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:14:12,570 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-03 19:14:12,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:14:12,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:14:12,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:14:12,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 19:14:12,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:14:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1220685095, now seen corresponding path program 1 times [2023-08-03 19:14:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:14:12,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449258946] [2023-08-03 19:14:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:14:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:14:12,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:14:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:14:12,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:14:12,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:14:12,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 19:14:12,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-03 19:14:12,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 19:14:12,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 19:14:12,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 19:14:12,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 19:14:12,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:14:12,785 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 19:14:12,793 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:14:12,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:14:12,877 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:14:12,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,059 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-03 19:14:13,059 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:14:13,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-03 19:14:13,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,089 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:14:13,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-03 19:14:13,247 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-03 19:14:13,247 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:14:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-03 19:14:13,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-03 19:14:17,954 INFO L134 LiptonReduction]: Checked pairs total: 88803 [2023-08-03 19:14:17,955 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-03 19:14:17,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:14:17,958 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;@7111dfdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:14:17,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 19:14:17,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:14:17,962 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-03 19:14:17,962 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 19:14:17,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:14:17,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:14:17,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:14:17,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:14:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2113783019, now seen corresponding path program 1 times [2023-08-03 19:14:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:14:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203198340] [2023-08-03 19:14:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:14:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:14:18,088 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 19:14:18,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:14:18,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203198340] [2023-08-03 19:14:18,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203198340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:14:18,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:14:18,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:14:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594681499] [2023-08-03 19:14:18,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:14:18,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:14:18,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:14:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:14:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:14:18,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 570 [2023-08-03 19:14:18,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 19:14:18,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:14:18,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 570 [2023-08-03 19:14:18,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:15:47,642 INFO L124 PetriNetUnfolderBase]: 1304650/1649733 cut-off events. [2023-08-03 19:15:47,643 INFO L125 PetriNetUnfolderBase]: For 77242/77242 co-relation queries the response was YES. [2023-08-03 19:15:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313438 conditions, 1649733 events. 1304650/1649733 cut-off events. For 77242/77242 co-relation queries the response was YES. Maximal size of possible extension queue 32970. Compared 11025812 event pairs, 413379 based on Foata normal form. 0/1181037 useless extension candidates. Maximal degree in co-relation 1631827. Up to 879863 conditions per place. [2023-08-03 19:16:00,358 INFO L140 encePairwiseOnDemand]: 561/570 looper letters, 139 selfloop transitions, 7 changer transitions 0/154 dead transitions. [2023-08-03 19:16:00,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 154 transitions, 685 flow [2023-08-03 19:16:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:16:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:16:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 940 transitions. [2023-08-03 19:16:00,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497076023391813 [2023-08-03 19:16:00,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 940 transitions. [2023-08-03 19:16:00,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 940 transitions. [2023-08-03 19:16:00,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:16:00,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 940 transitions. [2023-08-03 19:16:00,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 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 19:16:00,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 19:16:00,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 19:16:00,412 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 3 states and 940 transitions. [2023-08-03 19:16:00,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 154 transitions, 685 flow [2023-08-03 19:16:00,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 154 transitions, 685 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:16:00,642 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 270 flow [2023-08-03 19:16:00,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-03 19:16:00,647 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-03 19:16:00,648 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 270 flow [2023-08-03 19:16:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 19:16:00,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:16:00,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:16:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:16:00,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:16:00,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:16:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 389222127, now seen corresponding path program 1 times [2023-08-03 19:16:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:16:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027809556] [2023-08-03 19:16:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:16:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:16:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:16:00,747 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 19:16:00,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:16:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027809556] [2023-08-03 19:16:00,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027809556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:16:00,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:16:00,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:16:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536019782] [2023-08-03 19:16:00,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:16:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:16:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:16:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:16:00,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:16:00,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 570 [2023-08-03 19:16:00,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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 19:16:00,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:16:00,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 570 [2023-08-03 19:16:00,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand