/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:00:40,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:00:40,126 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:00:40,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:00:40,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:00:40,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:00:40,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:00:40,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:00:40,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:00:40,164 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:00:40,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:00:40,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:00:40,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:00:40,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:00:40,166 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:00:40,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:00:40,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:00:40,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:00:40,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:00:40,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:00:40,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:00:40,168 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:00:40,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:00:40,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:00:40,168 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:00:40,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:00:40,169 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:00:40,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:00:40,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:00:40,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:00:40,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:40,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:00:40,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:00:40,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:00:40,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:00:40,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:00:40,172 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:00:40,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:00:40,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:00:40,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:00:40,448 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:00:40,448 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:00:40,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 02:00:41,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:00:41,793 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:00:41,793 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 02:00:41,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bb26c13/c37868b404cd4dd3ba9c823bc08d2bf3/FLAGd842d0e65 [2023-08-04 02:00:41,818 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bb26c13/c37868b404cd4dd3ba9c823bc08d2bf3 [2023-08-04 02:00:41,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:00:41,823 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:00:41,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:41,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:00:41,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:00:41,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:41" (1/1) ... [2023-08-04 02:00:41,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339f2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:41, skipping insertion in model container [2023-08-04 02:00:41,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:41" (1/1) ... [2023-08-04 02:00:41,865 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:00:42,016 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c[3277,3290] [2023-08-04 02:00:42,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:42,031 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:00:42,056 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c[3277,3290] [2023-08-04 02:00:42,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:42,077 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:00:42,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42 WrapperNode [2023-08-04 02:00:42,078 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:42,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:42,079 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:00:42,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:00:42,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,123 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 325 [2023-08-04 02:00:42,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:42,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:00:42,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:00:42,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:00:42,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:00:42,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:00:42,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:00:42,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:00:42,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (1/1) ... [2023-08-04 02:00:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:42,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:42,189 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) [2023-08-04 02:00:42,216 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 [2023-08-04 02:00:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:00:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:00:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:00:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:00:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:00:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:00:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:00:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:00:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:00:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:00:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:00:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:00:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:00:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:00:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:00:42,233 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:00:42,326 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:00:42,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:00:42,721 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:00:42,731 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:00:42,731 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 02:00:42,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:42 BoogieIcfgContainer [2023-08-04 02:00:42,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:00:42,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:00:42,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:00:42,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:00:42,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:00:41" (1/3) ... [2023-08-04 02:00:42,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530c8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:42, skipping insertion in model container [2023-08-04 02:00:42,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:42" (2/3) ... [2023-08-04 02:00:42,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530c8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:42, skipping insertion in model container [2023-08-04 02:00:42,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:42" (3/3) ... [2023-08-04 02:00:42,742 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 02:00:42,748 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:00:42,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:00:42,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:00:42,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:00:42,921 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:00:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,252 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 02:00:43,253 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 02:00:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 02:00:43,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:43,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 02:00:43,485 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 02:00:43,485 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 02:00:43,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 02:00:43,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 32940 [2023-08-04 02:00:52,018 INFO L134 LiptonReduction]: Checked pairs total: 41765 [2023-08-04 02:00:52,018 INFO L136 LiptonReduction]: Total number of compositions: 385 [2023-08-04 02:00:52,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:00:52,055 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;@43079154, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:52,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:00:52,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:52,067 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2023-08-04 02:00:52,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:00:52,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:52,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:52,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:00:52,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash -87948229, now seen corresponding path program 1 times [2023-08-04 02:00:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:52,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395925196] [2023-08-04 02:00:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:52,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:00:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395925196] [2023-08-04 02:00:52,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395925196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:52,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:52,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:00:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009444268] [2023-08-04 02:00:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:52,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 751 [2023-08-04 02:00:52,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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) [2023-08-04 02:00:52,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:52,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 751 [2023-08-04 02:00:52,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:53,374 INFO L124 PetriNetUnfolderBase]: 6180/9007 cut-off events. [2023-08-04 02:00:53,374 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2023-08-04 02:00:53,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18156 conditions, 9007 events. 6180/9007 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45787 event pairs, 4648 based on Foata normal form. 0/6893 useless extension candidates. Maximal degree in co-relation 15073. Up to 8700 conditions per place. [2023-08-04 02:00:53,411 INFO L140 encePairwiseOnDemand]: 743/751 looper letters, 30 selfloop transitions, 6 changer transitions 22/61 dead transitions. [2023-08-04 02:00:53,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 274 flow [2023-08-04 02:00:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-08-04 02:00:53,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429649356413671 [2023-08-04 02:00:53,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-08-04 02:00:53,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-08-04 02:00:53,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:53,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-08-04 02:00:53,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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) [2023-08-04 02:00:53,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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) [2023-08-04 02:00:53,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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) [2023-08-04 02:00:53,457 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 160 flow. Second operand 3 states and 998 transitions. [2023-08-04 02:00:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 274 flow [2023-08-04 02:00:53,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:00:53,466 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 119 flow [2023-08-04 02:00:53,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-08-04 02:00:53,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 02:00:53,472 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 119 flow [2023-08-04 02:00:53,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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) [2023-08-04 02:00:53,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:53,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:53,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:00:53,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:00:53,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash -822728776, now seen corresponding path program 1 times [2023-08-04 02:00:53,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:53,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524796151] [2023-08-04 02:00:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:53,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:00:53,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:53,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524796151] [2023-08-04 02:00:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524796151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:53,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284864799] [2023-08-04 02:00:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:53,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:53,621 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) [2023-08-04 02:00:53,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:00:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:53,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:00:53,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:00:53,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:00:53,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284864799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:53,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:53,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:00:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173352101] [2023-08-04 02:00:53,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:53,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:00:53,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:00:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:00:53,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 751 [2023-08-04 02:00:53,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 119 flow. Second operand has 8 states, 8 states have (on average 309.25) internal successors, (2474), 8 states have internal predecessors, (2474), 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) [2023-08-04 02:00:53,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:53,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 751 [2023-08-04 02:00:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:54,289 INFO L124 PetriNetUnfolderBase]: 1581/2359 cut-off events. [2023-08-04 02:00:54,290 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 02:00:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 2359 events. 1581/2359 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9710 event pairs, 1228 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 4781. Up to 2316 conditions per place. [2023-08-04 02:00:54,305 INFO L140 encePairwiseOnDemand]: 744/751 looper letters, 30 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2023-08-04 02:00:54,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 245 flow [2023-08-04 02:00:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:00:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:00:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1896 transitions. [2023-08-04 02:00:54,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207723035952064 [2023-08-04 02:00:54,319 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1896 transitions. [2023-08-04 02:00:54,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1896 transitions. [2023-08-04 02:00:54,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:54,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1896 transitions. [2023-08-04 02:00:54,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 316.0) internal successors, (1896), 6 states have internal predecessors, (1896), 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) [2023-08-04 02:00:54,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 751.0) internal successors, (5257), 7 states have internal predecessors, (5257), 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) [2023-08-04 02:00:54,334 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 751.0) internal successors, (5257), 7 states have internal predecessors, (5257), 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) [2023-08-04 02:00:54,334 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 119 flow. Second operand 6 states and 1896 transitions. [2023-08-04 02:00:54,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 245 flow [2023-08-04 02:00:54,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:54,337 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 209 flow [2023-08-04 02:00:54,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 02:00:54,339 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-04 02:00:54,339 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 209 flow [2023-08-04 02:00:54,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 309.25) internal successors, (2474), 8 states have internal predecessors, (2474), 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) [2023-08-04 02:00:54,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:54,341 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:54,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:00:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:54,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:00:54,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1153076987, now seen corresponding path program 2 times [2023-08-04 02:00:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88042987] [2023-08-04 02:00:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:00:54,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:54,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88042987] [2023-08-04 02:00:54,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88042987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:54,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660947000] [2023-08-04 02:00:54,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:00:54,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:54,828 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) [2023-08-04 02:00:54,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:00:54,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:00:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:00:54,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:00:54,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:00:55,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:00:55,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660947000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:55,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:55,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 02:00:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694338929] [2023-08-04 02:00:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:00:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:00:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:00:55,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 751 [2023-08-04 02:00:55,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 209 flow. Second operand has 17 states, 17 states have (on average 308.5882352941176) internal successors, (5246), 17 states have internal predecessors, (5246), 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) [2023-08-04 02:00:55,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:55,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 751 [2023-08-04 02:00:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:55,733 INFO L124 PetriNetUnfolderBase]: 1581/2362 cut-off events. [2023-08-04 02:00:55,733 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:00:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2362 events. 1581/2362 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9771 event pairs, 1228 based on Foata normal form. 1/1969 useless extension candidates. Maximal degree in co-relation 4772. Up to 2316 conditions per place. [2023-08-04 02:00:55,746 INFO L140 encePairwiseOnDemand]: 744/751 looper letters, 30 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-04 02:00:55,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 323 flow [2023-08-04 02:00:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:00:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:00:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2200 transitions. [2023-08-04 02:00:55,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41848963287045843 [2023-08-04 02:00:55,753 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2200 transitions. [2023-08-04 02:00:55,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2200 transitions. [2023-08-04 02:00:55,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:55,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2200 transitions. [2023-08-04 02:00:55,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 314.2857142857143) internal successors, (2200), 7 states have internal predecessors, (2200), 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) [2023-08-04 02:00:55,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 751.0) internal successors, (6008), 8 states have internal predecessors, (6008), 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) [2023-08-04 02:00:55,770 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 751.0) internal successors, (6008), 8 states have internal predecessors, (6008), 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) [2023-08-04 02:00:55,771 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 209 flow. Second operand 7 states and 2200 transitions. [2023-08-04 02:00:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 323 flow [2023-08-04 02:00:55,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 299 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:55,776 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 253 flow [2023-08-04 02:00:55,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-04 02:00:55,778 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 02:00:55,778 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 253 flow [2023-08-04 02:00:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 308.5882352941176) internal successors, (5246), 17 states have internal predecessors, (5246), 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) [2023-08-04 02:00:55,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:55,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:55,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 02:00:55,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:00:55,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash 506752760, now seen corresponding path program 3 times [2023-08-04 02:00:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:55,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770128187] [2023-08-04 02:00:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:56,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:00:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:56,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:00:56,132 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:00:56,133 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:00:56,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:00:56,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:00:56,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:00:56,137 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:00:56,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:00:56,139 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:00:56,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:00:56,201 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:00:56,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:57,371 INFO L124 PetriNetUnfolderBase]: 976/5128 cut-off events. [2023-08-04 02:00:57,371 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 02:00:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 5128 events. 976/5128 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 45369 event pairs, 22 based on Foata normal form. 0/4396 useless extension candidates. Maximal degree in co-relation 3118. Up to 192 conditions per place. [2023-08-04 02:00:57,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:57,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:57,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:57,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:57,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:57,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 02:00:58,579 INFO L124 PetriNetUnfolderBase]: 976/5128 cut-off events. [2023-08-04 02:00:58,579 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 02:00:58,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 5128 events. 976/5128 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 45369 event pairs, 22 based on Foata normal form. 0/4396 useless extension candidates. Maximal degree in co-relation 3118. Up to 192 conditions per place. [2023-08-04 02:00:58,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 108000 [2023-08-04 02:01:08,289 INFO L134 LiptonReduction]: Checked pairs total: 166349 [2023-08-04 02:01:08,289 INFO L136 LiptonReduction]: Total number of compositions: 536 [2023-08-04 02:01:08,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:01:08,292 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;@43079154, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:01:08,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:01:08,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:01:08,302 INFO L124 PetriNetUnfolderBase]: 16/139 cut-off events. [2023-08-04 02:01:08,302 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:01:08,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:08,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:08,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:01:08,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1992447739, now seen corresponding path program 1 times [2023-08-04 02:01:08,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:08,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732356279] [2023-08-04 02:01:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:08,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:01:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732356279] [2023-08-04 02:01:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732356279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:08,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:08,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:01:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832143023] [2023-08-04 02:01:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:08,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 436 out of 1049 [2023-08-04 02:01:08,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 438.6666666666667) internal successors, (1316), 3 states have internal predecessors, (1316), 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) [2023-08-04 02:01:08,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:08,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 436 of 1049 [2023-08-04 02:01:08,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand