/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:27:55,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:27:55,080 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:27:55,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:27:55,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:27:55,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:27:55,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:27:55,119 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:27:55,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:27:55,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:27:55,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:27:55,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:27:55,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:27:55,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:27:55,126 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:27:55,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:27:55,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:27:55,127 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:27:55,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:27:55,128 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:27:55,128 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:27:55,128 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:27:55,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:27:55,129 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:27:55,130 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:27:55,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:27:55,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:27:55,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:27:55,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:27:55,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:27:55,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:27:55,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:27:55,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:27:55,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:27:55,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:27:55,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:27:55,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:27:55,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:27:55,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:27:55,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:27:55,134 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:27:55,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:27:55,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:27:55,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:27:55,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:27:55,401 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:27:55,401 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:27:55,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 08:27:56,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:27:56,653 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:27:56,653 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 08:27:56,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9fdb87a/9f6555d7136f44769490301c8cebc487/FLAGaaa0d6437 [2023-08-04 08:27:56,679 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9fdb87a/9f6555d7136f44769490301c8cebc487 [2023-08-04 08:27:56,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:27:56,685 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:27:56,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:27:56,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:27:56,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:27:56,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159f99a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56, skipping insertion in model container [2023-08-04 08:27:56,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,724 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:27:56,872 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-nzb-file-symm.wvr_bound2.c[5091,5104] [2023-08-04 08:27:56,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:27:56,884 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:27:56,908 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-nzb-file-symm.wvr_bound2.c[5091,5104] [2023-08-04 08:27:56,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:27:56,943 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:27:56,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56 WrapperNode [2023-08-04 08:27:56,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:27:56,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:27:56,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:27:56,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:27:56,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,984 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 438 [2023-08-04 08:27:56,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:27:56,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:27:56,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:27:56,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:27:56,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:56,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:27:57,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:27:57,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:27:57,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:27:57,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (1/1) ... [2023-08-04 08:27:57,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:27:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:57,113 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 08:27:57,131 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 08:27:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:27:57,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:27:57,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:27:57,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:27:57,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:27:57,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:27:57,161 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 08:27:57,242 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:27:57,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:27:57,781 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:27:57,790 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:27:57,790 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:27:57,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:27:57 BoogieIcfgContainer [2023-08-04 08:27:57,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:27:57,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:27:57,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:27:57,796 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:27:57,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:27:56" (1/3) ... [2023-08-04 08:27:57,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2444076c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:27:57, skipping insertion in model container [2023-08-04 08:27:57,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:56" (2/3) ... [2023-08-04 08:27:57,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2444076c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:27:57, skipping insertion in model container [2023-08-04 08:27:57,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:27:57" (3/3) ... [2023-08-04 08:27:57,798 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 08:27:57,803 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:27:57,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:27:57,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:27:57,810 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:27:57,926 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:27:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,213 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 08:27:58,214 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:27:58,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 08:27:58,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,252 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:58,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:27:58,427 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 08:27:58,428 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:27:58,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 08:27:58,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 82992 [2023-08-04 08:28:11,965 INFO L134 LiptonReduction]: Checked pairs total: 96184 [2023-08-04 08:28:11,965 INFO L136 LiptonReduction]: Total number of compositions: 604 [2023-08-04 08:28:11,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:28:11,999 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;@271a0e74, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:11,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:28:12,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:12,018 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-08-04 08:28:12,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:12,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:12,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:12,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1306383322, now seen corresponding path program 1 times [2023-08-04 08:28:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179849216] [2023-08-04 08:28:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:28:12,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179849216] [2023-08-04 08:28:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179849216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:12,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:12,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:28:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292196903] [2023-08-04 08:28:12,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:12,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:12,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 1119 [2023-08-04 08:28:12,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 473.3333333333333) internal successors, (1420), 3 states have internal predecessors, (1420), 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 08:28:12,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:12,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 1119 [2023-08-04 08:28:12,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:13,007 INFO L124 PetriNetUnfolderBase]: 3861/5565 cut-off events. [2023-08-04 08:28:13,007 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-08-04 08:28:13,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10993 conditions, 5565 events. 3861/5565 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24896 event pairs, 2580 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 10245. Up to 5324 conditions per place. [2023-08-04 08:28:13,040 INFO L140 encePairwiseOnDemand]: 1113/1119 looper letters, 54 selfloop transitions, 4 changer transitions 2/64 dead transitions. [2023-08-04 08:28:13,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 266 flow [2023-08-04 08:28:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1474 transitions. [2023-08-04 08:28:13,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390825141495383 [2023-08-04 08:28:13,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1474 transitions. [2023-08-04 08:28:13,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1474 transitions. [2023-08-04 08:28:13,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:13,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1474 transitions. [2023-08-04 08:28:13,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.3333333333333) internal successors, (1474), 3 states have internal predecessors, (1474), 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 08:28:13,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:13,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:13,089 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 148 flow. Second operand 3 states and 1474 transitions. [2023-08-04 08:28:13,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 266 flow [2023-08-04 08:28:13,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:28:13,096 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 160 flow [2023-08-04 08:28:13,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2023-08-04 08:28:13,103 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:28:13,103 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 160 flow [2023-08-04 08:28:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 473.3333333333333) internal successors, (1420), 3 states have internal predecessors, (1420), 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 08:28:13,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:13,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:13,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:28:13,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:13,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1745335043, now seen corresponding path program 1 times [2023-08-04 08:28:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:13,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029747225] [2023-08-04 08:28:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:13,224 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 08:28:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029747225] [2023-08-04 08:28:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029747225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826059324] [2023-08-04 08:28:13,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:13,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1119 [2023-08-04 08:28:13,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 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 08:28:13,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:13,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1119 [2023-08-04 08:28:13,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:13,788 INFO L124 PetriNetUnfolderBase]: 3731/5378 cut-off events. [2023-08-04 08:28:13,788 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-08-04 08:28:13,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10708 conditions, 5378 events. 3731/5378 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25151 event pairs, 1176 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 10685. Up to 5213 conditions per place. [2023-08-04 08:28:13,816 INFO L140 encePairwiseOnDemand]: 1116/1119 looper letters, 73 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 08:28:13,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 344 flow [2023-08-04 08:28:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1499 transitions. [2023-08-04 08:28:13,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44652963955913016 [2023-08-04 08:28:13,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1499 transitions. [2023-08-04 08:28:13,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1499 transitions. [2023-08-04 08:28:13,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:13,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1499 transitions. [2023-08-04 08:28:13,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 499.6666666666667) internal successors, (1499), 3 states have internal predecessors, (1499), 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 08:28:13,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:13,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:13,833 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 160 flow. Second operand 3 states and 1499 transitions. [2023-08-04 08:28:13,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 344 flow [2023-08-04 08:28:13,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 79 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:28:13,836 INFO L231 Difference]: Finished difference. Result has 51 places, 62 transitions, 158 flow [2023-08-04 08:28:13,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=51, PETRI_TRANSITIONS=62} [2023-08-04 08:28:13,837 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 08:28:13,837 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 62 transitions, 158 flow [2023-08-04 08:28:13,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 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 08:28:13,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:13,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:13,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:28:13,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:13,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1285968027, now seen corresponding path program 1 times [2023-08-04 08:28:13,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:13,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143693975] [2023-08-04 08:28:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:28:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143693975] [2023-08-04 08:28:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143693975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673324820] [2023-08-04 08:28:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:13,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:13,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:13,934 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 08:28:13,938 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 08:28:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:14,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:14,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:14,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:14,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673324820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:14,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555293157] [2023-08-04 08:28:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:14,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1119 [2023-08-04 08:28:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 62 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 479.0) internal successors, (1437), 3 states have internal predecessors, (1437), 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 08:28:14,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:14,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1119 [2023-08-04 08:28:14,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:14,562 INFO L124 PetriNetUnfolderBase]: 3635/5301 cut-off events. [2023-08-04 08:28:14,562 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 08:28:14,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10643 conditions, 5301 events. 3635/5301 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26110 event pairs, 1201 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 10614. Up to 4719 conditions per place. [2023-08-04 08:28:14,577 INFO L140 encePairwiseOnDemand]: 1116/1119 looper letters, 90 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-04 08:28:14,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 96 transitions, 410 flow [2023-08-04 08:28:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1516 transitions. [2023-08-04 08:28:14,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45159368483765266 [2023-08-04 08:28:14,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1516 transitions. [2023-08-04 08:28:14,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1516 transitions. [2023-08-04 08:28:14,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:14,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1516 transitions. [2023-08-04 08:28:14,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 505.3333333333333) internal successors, (1516), 3 states have internal predecessors, (1516), 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 08:28:14,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:14,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:14,589 INFO L175 Difference]: Start difference. First operand has 51 places, 62 transitions, 158 flow. Second operand 3 states and 1516 transitions. [2023-08-04 08:28:14,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 96 transitions, 410 flow [2023-08-04 08:28:14,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 96 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:14,591 INFO L231 Difference]: Finished difference. Result has 52 places, 62 transitions, 162 flow [2023-08-04 08:28:14,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=52, PETRI_TRANSITIONS=62} [2023-08-04 08:28:14,591 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 08:28:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 62 transitions, 162 flow [2023-08-04 08:28:14,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 479.0) internal successors, (1437), 3 states have internal predecessors, (1437), 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 08:28:14,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:14,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:14,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:28:14,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:14,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:14,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:14,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2139343220, now seen corresponding path program 1 times [2023-08-04 08:28:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:14,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328923206] [2023-08-04 08:28:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328923206] [2023-08-04 08:28:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328923206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750526172] [2023-08-04 08:28:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:14,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:14,879 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 08:28:14,922 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 08:28:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:14,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:14,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:14,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:14,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750526172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:14,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:14,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:14,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848260642] [2023-08-04 08:28:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1119 [2023-08-04 08:28:15,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 480.0) internal successors, (1440), 3 states have internal predecessors, (1440), 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 08:28:15,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:15,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1119 [2023-08-04 08:28:15,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:15,317 INFO L124 PetriNetUnfolderBase]: 2318/3425 cut-off events. [2023-08-04 08:28:15,318 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-04 08:28:15,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7369 conditions, 3425 events. 2318/3425 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15445 event pairs, 948 based on Foata normal form. 0/2564 useless extension candidates. Maximal degree in co-relation 7340. Up to 2085 conditions per place. [2023-08-04 08:28:15,333 INFO L140 encePairwiseOnDemand]: 1116/1119 looper letters, 93 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 08:28:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 430 flow [2023-08-04 08:28:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1519 transitions. [2023-08-04 08:28:15,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524873398868037 [2023-08-04 08:28:15,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1519 transitions. [2023-08-04 08:28:15,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1519 transitions. [2023-08-04 08:28:15,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:15,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1519 transitions. [2023-08-04 08:28:15,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 506.3333333333333) internal successors, (1519), 3 states have internal predecessors, (1519), 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 08:28:15,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:15,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:15,350 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 162 flow. Second operand 3 states and 1519 transitions. [2023-08-04 08:28:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 430 flow [2023-08-04 08:28:15,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 99 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:15,355 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 170 flow [2023-08-04 08:28:15,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=63} [2023-08-04 08:28:15,359 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:28:15,359 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 170 flow [2023-08-04 08:28:15,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 480.0) internal successors, (1440), 3 states have internal predecessors, (1440), 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 08:28:15,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:15,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:15,371 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 08:28:15,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:28:15,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:15,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1740347271, now seen corresponding path program 1 times [2023-08-04 08:28:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408217361] [2023-08-04 08:28:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:15,638 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 08:28:15,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408217361] [2023-08-04 08:28:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408217361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868833521] [2023-08-04 08:28:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:15,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:15,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:15,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:28:15,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:28:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:15,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:15,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:28:15,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868833521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:15,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:28:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637919478] [2023-08-04 08:28:15,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:15,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1119 [2023-08-04 08:28:15,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 481.3333333333333) internal successors, (1444), 3 states have internal predecessors, (1444), 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 08:28:15,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:15,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1119 [2023-08-04 08:28:15,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:16,128 INFO L124 PetriNetUnfolderBase]: 2315/3393 cut-off events. [2023-08-04 08:28:16,128 INFO L125 PetriNetUnfolderBase]: For 996/996 co-relation queries the response was YES. [2023-08-04 08:28:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7347 conditions, 3393 events. 2315/3393 cut-off events. For 996/996 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14480 event pairs, 1525 based on Foata normal form. 0/2594 useless extension candidates. Maximal degree in co-relation 7317. Up to 3160 conditions per place. [2023-08-04 08:28:16,136 INFO L140 encePairwiseOnDemand]: 1116/1119 looper letters, 89 selfloop transitions, 2 changer transitions 2/97 dead transitions. [2023-08-04 08:28:16,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 97 transitions, 424 flow [2023-08-04 08:28:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1516 transitions. [2023-08-04 08:28:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45159368483765266 [2023-08-04 08:28:16,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1516 transitions. [2023-08-04 08:28:16,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1516 transitions. [2023-08-04 08:28:16,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:16,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1516 transitions. [2023-08-04 08:28:16,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 505.3333333333333) internal successors, (1516), 3 states have internal predecessors, (1516), 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 08:28:16,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:16,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 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 08:28:16,150 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 170 flow. Second operand 3 states and 1516 transitions. [2023-08-04 08:28:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 97 transitions, 424 flow [2023-08-04 08:28:16,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 97 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:16,155 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 172 flow [2023-08-04 08:28:16,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-08-04 08:28:16,156 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 08:28:16,156 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 172 flow [2023-08-04 08:28:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 481.3333333333333) internal successors, (1444), 3 states have internal predecessors, (1444), 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 08:28:16,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:16,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:16,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:28:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:16,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:16,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1223450074, now seen corresponding path program 1 times [2023-08-04 08:28:16,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:16,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211257108] [2023-08-04 08:28:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:16,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:28:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211257108] [2023-08-04 08:28:16,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211257108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055527070] [2023-08-04 08:28:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:16,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:28:16,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:28:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:16,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:28:16,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:28:16,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:28:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055527070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:16,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:16,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:28:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756134618] [2023-08-04 08:28:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:28:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:28:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:28:16,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 462 out of 1119 [2023-08-04 08:28:16,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 172 flow. Second operand has 8 states, 8 states have (on average 466.5) internal successors, (3732), 8 states have internal predecessors, (3732), 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 08:28:16,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:16,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 462 of 1119 [2023-08-04 08:28:16,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:16,750 INFO L124 PetriNetUnfolderBase]: 39/90 cut-off events. [2023-08-04 08:28:16,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:16,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 90 events. 39/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 16/90 useless extension candidates. Maximal degree in co-relation 206. Up to 58 conditions per place. [2023-08-04 08:28:16,751 INFO L140 encePairwiseOnDemand]: 1112/1119 looper letters, 0 selfloop transitions, 0 changer transitions 50/50 dead transitions. [2023-08-04 08:28:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 228 flow [2023-08-04 08:28:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:28:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:28:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3752 transitions. [2023-08-04 08:28:16,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419124218051832 [2023-08-04 08:28:16,761 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3752 transitions. [2023-08-04 08:28:16,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3752 transitions. [2023-08-04 08:28:16,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:16,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3752 transitions. [2023-08-04 08:28:16,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 469.0) internal successors, (3752), 8 states have internal predecessors, (3752), 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 08:28:16,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1119.0) internal successors, (10071), 9 states have internal predecessors, (10071), 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 08:28:16,781 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1119.0) internal successors, (10071), 9 states have internal predecessors, (10071), 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 08:28:16,781 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 172 flow. Second operand 8 states and 3752 transitions. [2023-08-04 08:28:16,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 228 flow [2023-08-04 08:28:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:16,783 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-04 08:28:16,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-04 08:28:16,783 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -17 predicate places. [2023-08-04 08:28:16,783 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-04 08:28:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 466.5) internal successors, (3732), 8 states have internal predecessors, (3732), 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 08:28:16,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:28:16,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:28:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:16,992 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 08:28:16,994 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:28:16,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,123 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 08:28:17,124 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:28:17,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 08:28:17,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,137 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:28:17,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 08:28:17,232 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 08:28:17,232 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:28:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 08:28:17,262 INFO L119 LiptonReduction]: Number of co-enabled transitions 82992 [2023-08-04 08:28:28,496 INFO L134 LiptonReduction]: Checked pairs total: 97906 [2023-08-04 08:28:28,497 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-08-04 08:28:28,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:28:28,505 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;@271a0e74, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:28,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:28:28,508 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:28,508 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 08:28:28,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:28,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:28,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:28,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:28:28,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1656741047, now seen corresponding path program 1 times [2023-08-04 08:28:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404536522] [2023-08-04 08:28:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:28,566 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 08:28:28,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:28,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404536522] [2023-08-04 08:28:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404536522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:28,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:28:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216968972] [2023-08-04 08:28:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:28,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 469 out of 1129 [2023-08-04 08:28:28,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 471.0) internal successors, (1413), 3 states have internal predecessors, (1413), 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 08:28:28,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:28,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 469 of 1129 [2023-08-04 08:28:28,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:28,905 INFO L124 PetriNetUnfolderBase]: 3877/5581 cut-off events. [2023-08-04 08:28:28,906 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-08-04 08:28:28,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11123 conditions, 5581 events. 3877/5581 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24927 event pairs, 2580 based on Foata normal form. 0/3707 useless extension candidates. Maximal degree in co-relation 10365. Up to 5438 conditions per place. [2023-08-04 08:28:28,918 INFO L140 encePairwiseOnDemand]: 1123/1129 looper letters, 45 selfloop transitions, 4 changer transitions 12/64 dead transitions. [2023-08-04 08:28:28,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 268 flow [2023-08-04 08:28:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1469 transitions. [2023-08-04 08:28:28,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43371715382344256 [2023-08-04 08:28:28,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1469 transitions. [2023-08-04 08:28:28,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1469 transitions. [2023-08-04 08:28:28,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:28,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1469 transitions. [2023-08-04 08:28:28,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 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 08:28:28,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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 08:28:28,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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 08:28:28,989 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 148 flow. Second operand 3 states and 1469 transitions. [2023-08-04 08:28:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 268 flow [2023-08-04 08:28:28,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:28:28,991 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 132 flow [2023-08-04 08:28:28,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-04 08:28:28,991 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:28:28,991 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 132 flow [2023-08-04 08:28:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 471.0) internal successors, (1413), 3 states have internal predecessors, (1413), 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 08:28:28,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:28,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:28,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:28:28,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:28:28,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1971601709, now seen corresponding path program 1 times [2023-08-04 08:28:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:28,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656306592] [2023-08-04 08:28:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:29,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:29,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656306592] [2023-08-04 08:28:29,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656306592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:29,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951195263] [2023-08-04 08:28:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:29,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:29,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:28:29,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:28:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:29,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:28:29,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:29,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:29,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951195263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:29,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:29,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:28:29,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992994] [2023-08-04 08:28:29,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:29,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:28:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:28:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:28:29,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1129 [2023-08-04 08:28:29,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 468.75) internal successors, (3750), 8 states have internal predecessors, (3750), 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 08:28:29,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:29,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1129 [2023-08-04 08:28:29,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:29,462 INFO L124 PetriNetUnfolderBase]: 1804/2638 cut-off events. [2023-08-04 08:28:29,462 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:28:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5281 conditions, 2638 events. 1804/2638 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10297 event pairs, 1188 based on Foata normal form. 3/1804 useless extension candidates. Maximal degree in co-relation 5249. Up to 2572 conditions per place. [2023-08-04 08:28:29,469 INFO L140 encePairwiseOnDemand]: 1124/1129 looper letters, 45 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2023-08-04 08:28:29,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 266 flow [2023-08-04 08:28:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:28:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:28:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2863 transitions. [2023-08-04 08:28:29,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42264540891644525 [2023-08-04 08:28:29,475 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2863 transitions. [2023-08-04 08:28:29,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2863 transitions. [2023-08-04 08:28:29,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:29,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2863 transitions. [2023-08-04 08:28:29,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 477.1666666666667) internal successors, (2863), 6 states have internal predecessors, (2863), 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 08:28:29,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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 08:28:29,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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 08:28:29,487 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 132 flow. Second operand 6 states and 2863 transitions. [2023-08-04 08:28:29,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 266 flow [2023-08-04 08:28:29,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:29,489 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 194 flow [2023-08-04 08:28:29,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-08-04 08:28:29,491 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 08:28:29,491 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 194 flow [2023-08-04 08:28:29,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 468.75) internal successors, (3750), 8 states have internal predecessors, (3750), 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 08:28:29,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:29,492 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:29,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:28:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:29,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:28:29,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1204378807, now seen corresponding path program 2 times [2023-08-04 08:28:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:29,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48389106] [2023-08-04 08:28:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:28:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48389106] [2023-08-04 08:28:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48389106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441602451] [2023-08-04 08:28:29,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:28:29,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:29,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:28:29,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:28:29,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:28:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:28:29,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:28:29,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:28:29,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:28:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441602451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:29,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-04 08:28:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745040583] [2023-08-04 08:28:29,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 08:28:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 08:28:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2023-08-04 08:28:30,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1129 [2023-08-04 08:28:30,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 58 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 468.4166666666667) internal successors, (5621), 12 states have internal predecessors, (5621), 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 08:28:30,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:30,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1129 [2023-08-04 08:28:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:30,351 INFO L124 PetriNetUnfolderBase]: 1804/2640 cut-off events. [2023-08-04 08:28:30,351 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 08:28:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5311 conditions, 2640 events. 1804/2640 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10287 event pairs, 1188 based on Foata normal form. 1/1804 useless extension candidates. Maximal degree in co-relation 5240. Up to 2572 conditions per place. [2023-08-04 08:28:30,359 INFO L140 encePairwiseOnDemand]: 1124/1129 looper letters, 45 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2023-08-04 08:28:30,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 320 flow [2023-08-04 08:28:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:28:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:28:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3328 transitions. [2023-08-04 08:28:30,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42110590914842466 [2023-08-04 08:28:30,365 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3328 transitions. [2023-08-04 08:28:30,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3328 transitions. [2023-08-04 08:28:30,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:30,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3328 transitions. [2023-08-04 08:28:30,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 475.42857142857144) internal successors, (3328), 7 states have internal predecessors, (3328), 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 08:28:30,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1129.0) internal successors, (9032), 8 states have internal predecessors, (9032), 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 08:28:30,378 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1129.0) internal successors, (9032), 8 states have internal predecessors, (9032), 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 08:28:30,379 INFO L175 Difference]: Start difference. First operand has 52 places, 58 transitions, 194 flow. Second operand 7 states and 3328 transitions. [2023-08-04 08:28:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 320 flow [2023-08-04 08:28:30,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 304 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:30,380 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 224 flow [2023-08-04 08:28:30,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 08:28:30,381 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 08:28:30,381 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 224 flow [2023-08-04 08:28:30,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 468.4166666666667) internal successors, (5621), 12 states have internal predecessors, (5621), 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 08:28:30,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:30,382 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:30,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:28:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:30,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:28:30,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -441694675, now seen corresponding path program 3 times [2023-08-04 08:28:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556642607] [2023-08-04 08:28:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:28:30,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:28:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:28:30,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:28:30,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:28:30,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:28:30,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:28:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:28:30,668 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:28:30,668 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:28:30,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:28:30,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:28:30,721 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:28:30,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,176 INFO L124 PetriNetUnfolderBase]: 285/2106 cut-off events. [2023-08-04 08:28:31,177 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 08:28:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 2106 events. 285/2106 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 15060 event pairs, 2 based on Foata normal form. 0/1818 useless extension candidates. Maximal degree in co-relation 1329. Up to 32 conditions per place. [2023-08-04 08:28:31,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:28:31,249 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 08:28:31,683 INFO L124 PetriNetUnfolderBase]: 285/2106 cut-off events. [2023-08-04 08:28:31,683 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 08:28:31,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 2106 events. 285/2106 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 15060 event pairs, 2 based on Foata normal form. 0/1818 useless extension candidates. Maximal degree in co-relation 1329. Up to 32 conditions per place. [2023-08-04 08:28:32,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 366912 [2023-08-04 08:28:46,619 INFO L134 LiptonReduction]: Checked pairs total: 704380 [2023-08-04 08:28:46,619 INFO L136 LiptonReduction]: Total number of compositions: 899 [2023-08-04 08:28:46,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:28:46,629 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;@271a0e74, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:46,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:28:46,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:46,631 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-04 08:28:46,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:46,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:46,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:46,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:46,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 52055131, now seen corresponding path program 1 times [2023-08-04 08:28:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:46,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128709631] [2023-08-04 08:28:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:46,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:28:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128709631] [2023-08-04 08:28:46,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128709631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:46,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:46,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739608872] [2023-08-04 08:28:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:46,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:46,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:46,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:46,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 769 out of 1732 [2023-08-04 08:28:46,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 193 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 771.3333333333334) internal successors, (2314), 3 states have internal predecessors, (2314), 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 08:28:46,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:46,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 769 of 1732 [2023-08-04 08:28:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand