/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_unroll-2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:53:26,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:53:26,975 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:53:26,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:53:26,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:53:26,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:53:26,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:53:27,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:53:27,024 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:53:27,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:53:27,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:53:27,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:53:27,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:53:27,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:53:27,031 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:53:27,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:53:27,032 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:53:27,032 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:53:27,032 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:53:27,032 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:53:27,032 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:53:27,033 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:53:27,033 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:53:27,034 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:53:27,034 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:53:27,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:53:27,035 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:53:27,035 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:53:27,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:53:27,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:53:27,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:53:27,037 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:53:27,037 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:53:27,037 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:53:27,037 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:53:27,038 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:53:27,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:53:27,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:53:27,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:53:27,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:53:27,301 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:53:27,302 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:53:27,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-2.wvr_bound2.c [2023-08-04 09:53:28,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:53:28,658 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:53:28,658 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-2.wvr_bound2.c [2023-08-04 09:53:28,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0657cb5/c6e9c04ef4954a5a8c1daa34d38f303e/FLAG65abc6464 [2023-08-04 09:53:28,680 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0657cb5/c6e9c04ef4954a5a8c1daa34d38f303e [2023-08-04 09:53:28,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:53:28,684 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:53:28,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:53:28,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:53:28,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:53:28,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742a7784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28, skipping insertion in model container [2023-08-04 09:53:28,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,724 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:53:28,884 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_unroll-2.wvr_bound2.c[2590,2603] [2023-08-04 09:53:28,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:53:28,897 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:53:28,916 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_unroll-2.wvr_bound2.c[2590,2603] [2023-08-04 09:53:28,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:53:28,931 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:53:28,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28 WrapperNode [2023-08-04 09:53:28,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:53:28,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:53:28,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:53:28,933 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:53:28,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,977 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 169 [2023-08-04 09:53:28,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:53:28,978 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:53:28,978 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:53:28,978 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:53:28,986 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,995 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:28,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:29,000 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:29,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:29,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:53:29,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:53:29,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:53:29,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:53:29,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (1/1) ... [2023-08-04 09:53:29,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:53:29,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:29,054 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 09:53:29,084 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 09:53:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:53:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:53:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:53:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:53:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:53:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:53:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:53:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:53:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:53:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:53:29,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:53:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:53:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:53:29,102 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 09:53:29,212 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:53:29,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:53:29,528 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:53:29,536 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:53:29,536 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:53:29,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:53:29 BoogieIcfgContainer [2023-08-04 09:53:29,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:53:29,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:53:29,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:53:29,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:53:29,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:53:28" (1/3) ... [2023-08-04 09:53:29,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4610e64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:53:29, skipping insertion in model container [2023-08-04 09:53:29,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:28" (2/3) ... [2023-08-04 09:53:29,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4610e64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:53:29, skipping insertion in model container [2023-08-04 09:53:29,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:53:29" (3/3) ... [2023-08-04 09:53:29,573 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-2.wvr_bound2.c [2023-08-04 09:53:29,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:53:29,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:53:29,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:53:29,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:53:29,674 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:53:29,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,815 INFO L124 PetriNetUnfolderBase]: 43/349 cut-off events. [2023-08-04 09:53:29,816 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:29,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 349 events. 43/349 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2023-08-04 09:53:29,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,841 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:53:29,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:29,908 INFO L124 PetriNetUnfolderBase]: 43/349 cut-off events. [2023-08-04 09:53:29,909 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:29,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 349 events. 43/349 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2023-08-04 09:53:29,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 6644 [2023-08-04 09:53:34,191 INFO L134 LiptonReduction]: Checked pairs total: 9445 [2023-08-04 09:53:34,191 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 09:53:34,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:53:34,209 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;@48d8df10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:53:34,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:53:34,213 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:53:34,214 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 09:53:34,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:53:34,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:34,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:53:34,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:34,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 485873392, now seen corresponding path program 1 times [2023-08-04 09:53:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706621499] [2023-08-04 09:53:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:34,441 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 09:53:34,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:34,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706621499] [2023-08-04 09:53:34,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706621499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:34,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:53:34,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:53:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647992069] [2023-08-04 09:53:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:53:34,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2023-08-04 09:53:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 39 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 09:53:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2023-08-04 09:53:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:34,668 INFO L124 PetriNetUnfolderBase]: 629/993 cut-off events. [2023-08-04 09:53:34,668 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-04 09:53:34,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 993 events. 629/993 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4468 event pairs, 271 based on Foata normal form. 39/666 useless extension candidates. Maximal degree in co-relation 1709. Up to 950 conditions per place. [2023-08-04 09:53:34,678 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 31 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2023-08-04 09:53:34,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 170 flow [2023-08-04 09:53:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:53:34,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-04 09:53:34,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:53:34,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:53:34,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:34,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:53:34,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:34,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:34,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:34,720 INFO L175 Difference]: Start difference. First operand has 35 places, 39 transitions, 100 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:53:34,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 170 flow [2023-08-04 09:53:34,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:53:34,728 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 94 flow [2023-08-04 09:53:34,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-04 09:53:34,733 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-04 09:53:34,733 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 94 flow [2023-08-04 09:53:34,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 09:53:34,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:34,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:34,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:53:34,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:34,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2027539519, now seen corresponding path program 1 times [2023-08-04 09:53:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096215283] [2023-08-04 09:53:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:53:34,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096215283] [2023-08-04 09:53:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096215283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:34,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759361528] [2023-08-04 09:53:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:34,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:34,890 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 09:53:34,893 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 09:53:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:34,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:34,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:53:35,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:35,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759361528] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:35,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:35,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:53:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133273905] [2023-08-04 09:53:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:35,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:35,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2023-08-04 09:53:35,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 09:53:35,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:35,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2023-08-04 09:53:35,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:35,171 INFO L124 PetriNetUnfolderBase]: 625/979 cut-off events. [2023-08-04 09:53:35,171 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 09:53:35,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 979 events. 625/979 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4418 event pairs, 205 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 1687. Up to 876 conditions per place. [2023-08-04 09:53:35,178 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 37 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 09:53:35,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 194 flow [2023-08-04 09:53:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 09:53:35,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620811287477954 [2023-08-04 09:53:35,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 09:53:35,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 09:53:35,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:35,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 09:53:35,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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 09:53:35,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:35,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:35,194 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 94 flow. Second operand 3 states and 524 transitions. [2023-08-04 09:53:35,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 194 flow [2023-08-04 09:53:35,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:53:35,197 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 92 flow [2023-08-04 09:53:35,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-04 09:53:35,198 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2023-08-04 09:53:35,198 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 92 flow [2023-08-04 09:53:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 09:53:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:35,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:35,208 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 09:53:35,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:35,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:35,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1273684059, now seen corresponding path program 1 times [2023-08-04 09:53:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617790392] [2023-08-04 09:53:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:53:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617790392] [2023-08-04 09:53:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617790392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693299197] [2023-08-04 09:53:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:35,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:35,521 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 09:53:35,525 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 09:53:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:35,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:35,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:35,596 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 09:53:35,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:35,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693299197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:35,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:35,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:53:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971843587] [2023-08-04 09:53:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:35,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2023-08-04 09:53:35,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 09:53:35,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:35,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2023-08-04 09:53:35,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:35,719 INFO L124 PetriNetUnfolderBase]: 400/649 cut-off events. [2023-08-04 09:53:35,720 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 09:53:35,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 649 events. 400/649 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2692 event pairs, 160 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 590. Up to 418 conditions per place. [2023-08-04 09:53:35,723 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 41 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 09:53:35,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 208 flow [2023-08-04 09:53:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-04 09:53:35,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46472663139329806 [2023-08-04 09:53:35,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-04 09:53:35,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-04 09:53:35,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:35,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-04 09:53:35,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 09:53:35,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:35,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:35,731 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 92 flow. Second operand 3 states and 527 transitions. [2023-08-04 09:53:35,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 208 flow [2023-08-04 09:53:35,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:35,733 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 100 flow [2023-08-04 09:53:35,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-04 09:53:35,735 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-04 09:53:35,735 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 100 flow [2023-08-04 09:53:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 09:53:35,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:35,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:35,743 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 09:53:35,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:53:35,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:35,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash -460151744, now seen corresponding path program 1 times [2023-08-04 09:53:35,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17625130] [2023-08-04 09:53:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:36,032 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 09:53:36,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:36,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17625130] [2023-08-04 09:53:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17625130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:36,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970605167] [2023-08-04 09:53:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:36,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:36,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:36,035 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 09:53:36,037 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 09:53:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:36,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:36,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:36,119 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 09:53:36,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970605167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:36,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:36,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:53:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008645174] [2023-08-04 09:53:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:36,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2023-08-04 09:53:36,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 09:53:36,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:36,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2023-08-04 09:53:36,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:36,231 INFO L124 PetriNetUnfolderBase]: 386/626 cut-off events. [2023-08-04 09:53:36,232 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-08-04 09:53:36,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 626 events. 386/626 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2483 event pairs, 233 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 615. Up to 557 conditions per place. [2023-08-04 09:53:36,234 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 35 selfloop transitions, 2 changer transitions 4/45 dead transitions. [2023-08-04 09:53:36,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 202 flow [2023-08-04 09:53:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 09:53:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620811287477954 [2023-08-04 09:53:36,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 09:53:36,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 09:53:36,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:36,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 09:53:36,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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 09:53:36,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:36,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:36,245 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 100 flow. Second operand 3 states and 524 transitions. [2023-08-04 09:53:36,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 202 flow [2023-08-04 09:53:36,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:36,249 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 100 flow [2023-08-04 09:53:36,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-04 09:53:36,250 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-04 09:53:36,250 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 100 flow [2023-08-04 09:53:36,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 09:53:36,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:36,251 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] [2023-08-04 09:53:36,256 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 09:53:36,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:36,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:36,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1099354650, now seen corresponding path program 1 times [2023-08-04 09:53:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:36,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548821307] [2023-08-04 09:53:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:36,531 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 09:53:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:36,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548821307] [2023-08-04 09:53:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548821307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:36,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852799753] [2023-08-04 09:53:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:36,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:36,537 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 09:53:36,548 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 09:53:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:36,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:53:36,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:36,660 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 09:53:36,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:36,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852799753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:36,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:36,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:53:36,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286319206] [2023-08-04 09:53:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:36,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2023-08-04 09:53:36,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 09:53:36,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:36,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2023-08-04 09:53:36,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:36,781 INFO L124 PetriNetUnfolderBase]: 340/551 cut-off events. [2023-08-04 09:53:36,781 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 09:53:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 551 events. 340/551 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2108 event pairs, 215 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 1088. Up to 534 conditions per place. [2023-08-04 09:53:36,784 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 28 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-04 09:53:36,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 162 flow [2023-08-04 09:53:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-04 09:53:36,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532627865961199 [2023-08-04 09:53:36,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-04 09:53:36,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-04 09:53:36,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:36,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-04 09:53:36,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 09:53:36,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:36,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 09:53:36,791 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 100 flow. Second operand 3 states and 514 transitions. [2023-08-04 09:53:36,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 162 flow [2023-08-04 09:53:36,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:36,795 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 108 flow [2023-08-04 09:53:36,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-04 09:53:36,797 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-04 09:53:36,797 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 108 flow [2023-08-04 09:53:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 09:53:36,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:36,798 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 09:53:36,807 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 09:53:37,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:37,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:37,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1837294914, now seen corresponding path program 1 times [2023-08-04 09:53:37,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:37,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229358392] [2023-08-04 09:53:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:37,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:37,066 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 09:53:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229358392] [2023-08-04 09:53:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229358392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644561348] [2023-08-04 09:53:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:37,068 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 09:53:37,071 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 09:53:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:37,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:37,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:37,166 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 09:53:37,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:37,190 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 09:53:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644561348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:37,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:37,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:53:37,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330818919] [2023-08-04 09:53:37,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:37,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:37,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:37,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 378 [2023-08-04 09:53:37,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 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 09:53:37,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:37,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 378 [2023-08-04 09:53:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:37,232 INFO L124 PetriNetUnfolderBase]: 11/27 cut-off events. [2023-08-04 09:53:37,232 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:53:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 27 events. 11/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 43 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 62. Up to 17 conditions per place. [2023-08-04 09:53:37,232 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:53:37,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 72 flow [2023-08-04 09:53:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-08-04 09:53:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2023-08-04 09:53:37,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-08-04 09:53:37,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-08-04 09:53:37,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:37,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-08-04 09:53:37,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 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 09:53:37,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 09:53:37,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 09:53:37,241 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 108 flow. Second operand 4 states and 654 transitions. [2023-08-04 09:53:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 72 flow [2023-08-04 09:53:37,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 66 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:37,241 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 09:53:37,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 09:53:37,243 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -16 predicate places. [2023-08-04 09:53:37,243 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 09:53:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 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 09:53:37,246 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:53:37,260 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 09:53:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:37,454 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:53:37,456 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:53:37,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,485 INFO L124 PetriNetUnfolderBase]: 43/349 cut-off events. [2023-08-04 09:53:37,485 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:37,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 349 events. 43/349 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2023-08-04 09:53:37,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,488 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:53:37,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,488 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 187 transitions, 396 flow [2023-08-04 09:53:37,512 INFO L124 PetriNetUnfolderBase]: 43/349 cut-off events. [2023-08-04 09:53:37,512 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:37,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 349 events. 43/349 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2023-08-04 09:53:37,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 6644 [2023-08-04 09:53:41,279 INFO L134 LiptonReduction]: Checked pairs total: 9180 [2023-08-04 09:53:41,279 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-04 09:53:41,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:53:41,281 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;@48d8df10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:53:41,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:53:41,301 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:53:41,301 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 09:53:41,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:53:41,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:41,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:53:41,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:53:41,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1039088229, now seen corresponding path program 1 times [2023-08-04 09:53:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:41,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340941395] [2023-08-04 09:53:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:41,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:41,357 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 09:53:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340941395] [2023-08-04 09:53:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340941395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:41,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:53:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:53:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465808993] [2023-08-04 09:53:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:53:41,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 373 [2023-08-04 09:53:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 09:53:41,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:41,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 373 [2023-08-04 09:53:41,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:41,467 INFO L124 PetriNetUnfolderBase]: 578/928 cut-off events. [2023-08-04 09:53:41,467 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-04 09:53:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 928 events. 578/928 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4261 event pairs, 354 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 1512. Up to 886 conditions per place. [2023-08-04 09:53:41,470 INFO L140 encePairwiseOnDemand]: 367/373 looper letters, 17 selfloop transitions, 2 changer transitions 13/36 dead transitions. [2023-08-04 09:53:41,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 154 flow [2023-08-04 09:53:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:53:41,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46201966041108133 [2023-08-04 09:53:41,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:53:41,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:53:41,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:41,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:53:41,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 09:53:41,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 09:53:41,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 09:53:41,475 INFO L175 Difference]: Start difference. First operand has 34 places, 38 transitions, 98 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:53:41,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 154 flow [2023-08-04 09:53:41,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:53:41,477 INFO L231 Difference]: Finished difference. Result has 36 places, 23 transitions, 66 flow [2023-08-04 09:53:41,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2023-08-04 09:53:41,478 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 09:53:41,479 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 66 flow [2023-08-04 09:53:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 09:53:41,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:41,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:41,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:53:41,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:53:41,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 939415879, now seen corresponding path program 1 times [2023-08-04 09:53:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:41,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310463793] [2023-08-04 09:53:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:53:41,508 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:53:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:53:41,543 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:53:41,543 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:53:41,543 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:53:41,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:53:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:53:41,545 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:53:41,545 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:53:41,546 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:53:41,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:53:41,576 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:53:41,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,679 INFO L124 PetriNetUnfolderBase]: 153/1021 cut-off events. [2023-08-04 09:53:41,679 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:53:41,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 1021 events. 153/1021 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5553 event pairs, 2 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 616. Up to 32 conditions per place. [2023-08-04 09:53:41,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:53:41,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 244 transitions, 536 flow [2023-08-04 09:53:41,800 INFO L124 PetriNetUnfolderBase]: 153/1021 cut-off events. [2023-08-04 09:53:41,800 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:53:41,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 1021 events. 153/1021 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5553 event pairs, 2 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 616. Up to 32 conditions per place. [2023-08-04 09:53:41,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 19484 [2023-08-04 09:53:45,929 INFO L134 LiptonReduction]: Checked pairs total: 34589 [2023-08-04 09:53:45,929 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-04 09:53:45,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:53:45,931 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;@48d8df10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:53:45,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:53:45,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:53:45,934 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 09:53:45,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:53:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:45,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:53:45,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:45,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash 166347013, now seen corresponding path program 1 times [2023-08-04 09:53:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:45,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086372660] [2023-08-04 09:53:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:45,959 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 09:53:45,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086372660] [2023-08-04 09:53:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086372660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:53:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:53:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292550121] [2023-08-04 09:53:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:53:45,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 474 [2023-08-04 09:53:45,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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 09:53:45,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:45,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 474 [2023-08-04 09:53:45,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:54,571 INFO L124 PetriNetUnfolderBase]: 108227/138325 cut-off events. [2023-08-04 09:53:54,571 INFO L125 PetriNetUnfolderBase]: For 9629/9629 co-relation queries the response was YES. [2023-08-04 09:53:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277641 conditions, 138325 events. 108227/138325 cut-off events. For 9629/9629 co-relation queries the response was YES. Maximal size of possible extension queue 4113. Compared 798666 event pairs, 60775 based on Foata normal form. 5528/97773 useless extension candidates. Maximal degree in co-relation 89362. Up to 134581 conditions per place. [2023-08-04 09:53:55,326 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 54 selfloop transitions, 2 changer transitions 2/67 dead transitions. [2023-08-04 09:53:55,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 294 flow [2023-08-04 09:53:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-04 09:53:55,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47960618846694797 [2023-08-04 09:53:55,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-04 09:53:55,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-04 09:53:55,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:55,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-04 09:53:55,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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 09:53:55,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,335 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 178 flow. Second operand 3 states and 682 transitions. [2023-08-04 09:53:55,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 294 flow [2023-08-04 09:53:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:53:55,340 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 170 flow [2023-08-04 09:53:55,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-08-04 09:53:55,340 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-04 09:53:55,341 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 170 flow [2023-08-04 09:53:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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 09:53:55,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:55,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:55,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:53:55,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:55,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1220266168, now seen corresponding path program 1 times [2023-08-04 09:53:55,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:55,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887546593] [2023-08-04 09:53:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:53:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:55,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887546593] [2023-08-04 09:53:55,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887546593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:55,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652239794] [2023-08-04 09:53:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:55,381 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 09:53:55,409 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 09:53:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:55,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:55,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:53:55,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652239794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:55,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:53:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015419371] [2023-08-04 09:53:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:55,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 474 [2023-08-04 09:53:55,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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 09:53:55,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:55,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 474 [2023-08-04 09:53:55,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:03,197 INFO L124 PetriNetUnfolderBase]: 107613/138386 cut-off events. [2023-08-04 09:54:03,198 INFO L125 PetriNetUnfolderBase]: For 8218/8218 co-relation queries the response was YES. [2023-08-04 09:54:03,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276730 conditions, 138386 events. 107613/138386 cut-off events. For 8218/8218 co-relation queries the response was YES. Maximal size of possible extension queue 4129. Compared 821893 event pairs, 55195 based on Foata normal form. 0/92913 useless extension candidates. Maximal degree in co-relation 276684. Up to 132872 conditions per place. [2023-08-04 09:54:03,846 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 67 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:54:03,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 344 flow [2023-08-04 09:54:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2023-08-04 09:54:03,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48523206751054854 [2023-08-04 09:54:03,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2023-08-04 09:54:03,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2023-08-04 09:54:03,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:03,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2023-08-04 09:54:03,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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 09:54:03,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:03,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:03,855 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 170 flow. Second operand 3 states and 690 transitions. [2023-08-04 09:54:03,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 344 flow [2023-08-04 09:54:03,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:54:03,874 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 174 flow [2023-08-04 09:54:03,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2023-08-04 09:54:03,875 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-08-04 09:54:03,875 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 174 flow [2023-08-04 09:54:03,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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 09:54:03,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:03,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:03,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:04,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:04,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash 883473741, now seen corresponding path program 1 times [2023-08-04 09:54:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:04,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816910603] [2023-08-04 09:54:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:54:04,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816910603] [2023-08-04 09:54:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816910603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703064837] [2023-08-04 09:54:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:04,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:04,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:04,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:54:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:04,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:04,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:04,199 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 09:54:04,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:04,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703064837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:04,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:04,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:54:04,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025634923] [2023-08-04 09:54:04,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:04,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:04,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 474 [2023-08-04 09:54:04,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 09:54:04,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:04,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 474 [2023-08-04 09:54:04,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:10,037 INFO L124 PetriNetUnfolderBase]: 81946/106243 cut-off events. [2023-08-04 09:54:10,037 INFO L125 PetriNetUnfolderBase]: For 7107/7107 co-relation queries the response was YES. [2023-08-04 09:54:10,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217839 conditions, 106243 events. 81946/106243 cut-off events. For 7107/7107 co-relation queries the response was YES. Maximal size of possible extension queue 3036. Compared 633033 event pairs, 38188 based on Foata normal form. 0/74970 useless extension candidates. Maximal degree in co-relation 69965. Up to 70847 conditions per place. [2023-08-04 09:54:10,588 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 79 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 09:54:10,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 404 flow [2023-08-04 09:54:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2023-08-04 09:54:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929676511954993 [2023-08-04 09:54:10,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2023-08-04 09:54:10,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2023-08-04 09:54:10,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:10,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2023-08-04 09:54:10,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:10,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:10,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:10,596 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 174 flow. Second operand 3 states and 701 transitions. [2023-08-04 09:54:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 404 flow [2023-08-04 09:54:10,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 90 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:10,601 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 184 flow [2023-08-04 09:54:10,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-04 09:54:10,602 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-04 09:54:10,602 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 184 flow [2023-08-04 09:54:10,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 09:54:10,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:10,603 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 09:54:10,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:10,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:10,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:10,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 158715646, now seen corresponding path program 1 times [2023-08-04 09:54:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790322594] [2023-08-04 09:54:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:10,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:10,844 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 09:54:10,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790322594] [2023-08-04 09:54:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790322594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746839843] [2023-08-04 09:54:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:10,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:10,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:10,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:54:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:10,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:10,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:10,929 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 09:54:10,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746839843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:54:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161976622] [2023-08-04 09:54:10,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:10,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:10,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 474 [2023-08-04 09:54:10,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 09:54:10,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:10,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 474 [2023-08-04 09:54:10,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:16,575 INFO L124 PetriNetUnfolderBase]: 79024/102686 cut-off events. [2023-08-04 09:54:16,575 INFO L125 PetriNetUnfolderBase]: For 22379/22379 co-relation queries the response was YES. [2023-08-04 09:54:16,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217596 conditions, 102686 events. 79024/102686 cut-off events. For 22379/22379 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 604155 event pairs, 47854 based on Foata normal form. 0/74803 useless extension candidates. Maximal degree in co-relation 77562. Up to 86170 conditions per place. [2023-08-04 09:54:17,026 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 80 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 09:54:17,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 91 transitions, 416 flow [2023-08-04 09:54:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2023-08-04 09:54:17,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929676511954993 [2023-08-04 09:54:17,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2023-08-04 09:54:17,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2023-08-04 09:54:17,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:17,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2023-08-04 09:54:17,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:17,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:17,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:17,033 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 184 flow. Second operand 3 states and 701 transitions. [2023-08-04 09:54:17,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 91 transitions, 416 flow [2023-08-04 09:54:17,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:17,185 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 194 flow [2023-08-04 09:54:17,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=194, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-04 09:54:17,185 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-08-04 09:54:17,185 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 194 flow [2023-08-04 09:54:17,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 09:54:17,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:17,186 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, 1] [2023-08-04 09:54:17,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:17,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 09:54:17,389 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:17,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 844437433, now seen corresponding path program 1 times [2023-08-04 09:54:17,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:17,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176699690] [2023-08-04 09:54:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:17,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:17,432 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 09:54:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:17,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176699690] [2023-08-04 09:54:17,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176699690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:17,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956410152] [2023-08-04 09:54:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:17,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:17,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:17,434 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:17,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:54:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:17,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:54:17,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:17,531 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 09:54:17,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956410152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:17,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:54:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022585661] [2023-08-04 09:54:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:17,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 474 [2023-08-04 09:54:17,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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 09:54:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:17,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 474 [2023-08-04 09:54:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:23,357 INFO L124 PetriNetUnfolderBase]: 79024/102687 cut-off events. [2023-08-04 09:54:23,357 INFO L125 PetriNetUnfolderBase]: For 18979/18979 co-relation queries the response was YES. [2023-08-04 09:54:23,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218566 conditions, 102687 events. 79024/102687 cut-off events. For 18979/18979 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 603390 event pairs, 55112 based on Foata normal form. 1/75100 useless extension candidates. Maximal degree in co-relation 180401. Up to 99812 conditions per place. [2023-08-04 09:54:23,820 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 53 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:54:23,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 306 flow [2023-08-04 09:54:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-04 09:54:23,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732770745428973 [2023-08-04 09:54:23,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-04 09:54:23,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-04 09:54:23,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:23,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-04 09:54:23,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 09:54:23,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,827 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 194 flow. Second operand 3 states and 673 transitions. [2023-08-04 09:54:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 306 flow [2023-08-04 09:54:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:24,198 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 204 flow [2023-08-04 09:54:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-04 09:54:24,198 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2023-08-04 09:54:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 204 flow [2023-08-04 09:54:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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 09:54:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:24,199 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, 1, 1] [2023-08-04 09:54:24,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:54:24,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:54:24,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:24,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1298341389, now seen corresponding path program 1 times [2023-08-04 09:54:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:24,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160555299] [2023-08-04 09:54:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,454 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 09:54:24,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:24,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160555299] [2023-08-04 09:54:24,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160555299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:24,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524104262] [2023-08-04 09:54:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:24,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:24,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:24,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:54:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:54:24,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:24,548 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 09:54:24,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:54:24,572 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 09:54:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524104262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:54:24,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:54:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:54:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048229935] [2023-08-04 09:54:24,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:54:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:54:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:54:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:24,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-04 09:54:24,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 09:54:24,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:24,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-04 09:54:24,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:29,636 INFO L124 PetriNetUnfolderBase]: 72033/93084 cut-off events. [2023-08-04 09:54:29,637 INFO L125 PetriNetUnfolderBase]: For 14969/14969 co-relation queries the response was YES. [2023-08-04 09:54:29,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197928 conditions, 93084 events. 72033/93084 cut-off events. For 14969/14969 co-relation queries the response was YES. Maximal size of possible extension queue 2776. Compared 533961 event pairs, 28651 based on Foata normal form. 5/67939 useless extension candidates. Maximal degree in co-relation 197909. Up to 90509 conditions per place. [2023-08-04 09:54:30,062 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 65 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-04 09:54:30,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 370 flow [2023-08-04 09:54:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 890 transitions. [2023-08-04 09:54:30,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4694092827004219 [2023-08-04 09:54:30,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 890 transitions. [2023-08-04 09:54:30,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 890 transitions. [2023-08-04 09:54:30,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:30,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 890 transitions. [2023-08-04 09:54:30,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:30,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:30,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:30,070 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 204 flow. Second operand 4 states and 890 transitions. [2023-08-04 09:54:30,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 370 flow [2023-08-04 09:54:30,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 366 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:30,537 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 214 flow [2023-08-04 09:54:30,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-08-04 09:54:30,537 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-08-04 09:54:30,538 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 214 flow [2023-08-04 09:54:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 09:54:30,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:30,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:30,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:54:30,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:30,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 183612409, now seen corresponding path program 1 times [2023-08-04 09:54:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:30,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578414779] [2023-08-04 09:54:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:54:30,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578414779] [2023-08-04 09:54:30,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578414779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:30,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478452499] [2023-08-04 09:54:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:30,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:30,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:30,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:54:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:30,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:54:30,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:54:30,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:54:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:54:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478452499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:54:30,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:54:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:54:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842342680] [2023-08-04 09:54:30,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:54:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:54:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:54:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:30,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-04 09:54:30,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 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 09:54:30,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:30,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-04 09:54:30,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:35,860 INFO L124 PetriNetUnfolderBase]: 69521/89992 cut-off events. [2023-08-04 09:54:35,860 INFO L125 PetriNetUnfolderBase]: For 8545/8545 co-relation queries the response was YES. [2023-08-04 09:54:36,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190974 conditions, 89992 events. 69521/89992 cut-off events. For 8545/8545 co-relation queries the response was YES. Maximal size of possible extension queue 2705. Compared 526746 event pairs, 19867 based on Foata normal form. 225/66173 useless extension candidates. Maximal degree in co-relation 190947. Up to 66529 conditions per place. [2023-08-04 09:54:36,298 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 92 selfloop transitions, 3 changer transitions 1/105 dead transitions. [2023-08-04 09:54:36,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 488 flow [2023-08-04 09:54:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-08-04 09:54:36,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48364978902953587 [2023-08-04 09:54:36,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-08-04 09:54:36,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-08-04 09:54:36,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:36,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-08-04 09:54:36,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 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 09:54:36,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:36,306 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:36,306 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 214 flow. Second operand 4 states and 917 transitions. [2023-08-04 09:54:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 488 flow [2023-08-04 09:54:37,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 479 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:54:37,381 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 219 flow [2023-08-04 09:54:37,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-08-04 09:54:37,382 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-04 09:54:37,382 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 219 flow [2023-08-04 09:54:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 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 09:54:37,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:37,383 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:37,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:54:37,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:37,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1010377735, now seen corresponding path program 1 times [2023-08-04 09:54:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038037222] [2023-08-04 09:54:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:54:37,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038037222] [2023-08-04 09:54:37,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038037222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:37,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289764307] [2023-08-04 09:54:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:37,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:37,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:37,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:54:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:37,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:54:37,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:54:37,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:54:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:54:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289764307] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:54:37,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:54:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:54:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029086108] [2023-08-04 09:54:37,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:54:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:54:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:54:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:37,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-04 09:54:37,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 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 09:54:37,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:37,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-04 09:54:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:41,376 INFO L124 PetriNetUnfolderBase]: 50321/65262 cut-off events. [2023-08-04 09:54:41,376 INFO L125 PetriNetUnfolderBase]: For 25093/25093 co-relation queries the response was YES. [2023-08-04 09:54:41,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143586 conditions, 65262 events. 50321/65262 cut-off events. For 25093/25093 co-relation queries the response was YES. Maximal size of possible extension queue 2029. Compared 368648 event pairs, 13189 based on Foata normal form. 1145/48733 useless extension candidates. Maximal degree in co-relation 143560. Up to 25909 conditions per place. [2023-08-04 09:54:41,709 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 103 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2023-08-04 09:54:41,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 546 flow [2023-08-04 09:54:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-04 09:54:41,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48945147679324896 [2023-08-04 09:54:41,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-04 09:54:41,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-04 09:54:41,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:41,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-04 09:54:41,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 09:54:41,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:41,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:41,717 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 219 flow. Second operand 4 states and 928 transitions. [2023-08-04 09:54:41,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 546 flow [2023-08-04 09:54:41,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 116 transitions, 536 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:54:41,868 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 230 flow [2023-08-04 09:54:41,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2023-08-04 09:54:41,869 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-04 09:54:41,869 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 230 flow [2023-08-04 09:54:41,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 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 09:54:41,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:41,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:41,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:54:42,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:42,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1170614291, now seen corresponding path program 1 times [2023-08-04 09:54:42,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:42,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086369062] [2023-08-04 09:54:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:42,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:54:42,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:42,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086369062] [2023-08-04 09:54:42,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086369062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:42,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107546143] [2023-08-04 09:54:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:42,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:42,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:54:42,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:54:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:42,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:54:42,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:54:42,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:54:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:54:42,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107546143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:54:42,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:54:42,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:54:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891540837] [2023-08-04 09:54:42,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:54:42,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:54:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:42,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:54:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:42,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-04 09:54:42,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 211.8) internal successors, (1059), 5 states have internal predecessors, (1059), 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 09:54:42,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:42,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-04 09:54:42,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:46,122 INFO L124 PetriNetUnfolderBase]: 50289/65070 cut-off events. [2023-08-04 09:54:46,123 INFO L125 PetriNetUnfolderBase]: For 35044/35044 co-relation queries the response was YES. [2023-08-04 09:54:46,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148718 conditions, 65070 events. 50289/65070 cut-off events. For 35044/35044 co-relation queries the response was YES. Maximal size of possible extension queue 2029. Compared 361899 event pairs, 34204 based on Foata normal form. 28/47126 useless extension candidates. Maximal degree in co-relation 148692. Up to 60964 conditions per place. [2023-08-04 09:54:46,412 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 97 selfloop transitions, 3 changer transitions 8/117 dead transitions. [2023-08-04 09:54:46,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 558 flow [2023-08-04 09:54:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-04 09:54:46,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48945147679324896 [2023-08-04 09:54:46,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-04 09:54:46,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-04 09:54:46,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:46,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-04 09:54:46,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 09:54:46,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:46,420 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:46,420 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 230 flow. Second operand 4 states and 928 transitions. [2023-08-04 09:54:46,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 558 flow [2023-08-04 09:54:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 554 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:46,920 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 230 flow [2023-08-04 09:54:46,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2023-08-04 09:54:46,921 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-04 09:54:46,921 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 230 flow [2023-08-04 09:54:46,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.8) internal successors, (1059), 5 states have internal predecessors, (1059), 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 09:54:46,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:46,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:46,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:54:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 09:54:47,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:47,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -223934244, now seen corresponding path program 1 times [2023-08-04 09:54:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:47,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5114196] [2023-08-04 09:54:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:54:47,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:47,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5114196] [2023-08-04 09:54:47,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5114196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:47,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:47,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:54:47,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26341040] [2023-08-04 09:54:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:47,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:47,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:47,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 474 [2023-08-04 09:54:47,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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 09:54:47,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:47,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 474 [2023-08-04 09:54:47,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:50,485 INFO L124 PetriNetUnfolderBase]: 45666/58522 cut-off events. [2023-08-04 09:54:50,485 INFO L125 PetriNetUnfolderBase]: For 34323/34323 co-relation queries the response was YES. [2023-08-04 09:54:50,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134584 conditions, 58522 events. 45666/58522 cut-off events. For 34323/34323 co-relation queries the response was YES. Maximal size of possible extension queue 1810. Compared 322683 event pairs, 6552 based on Foata normal form. 1/45134 useless extension candidates. Maximal degree in co-relation 134556. Up to 51178 conditions per place. [2023-08-04 09:54:50,786 INFO L140 encePairwiseOnDemand]: 468/474 looper letters, 88 selfloop transitions, 5 changer transitions 1/103 dead transitions. [2023-08-04 09:54:50,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 590 flow [2023-08-04 09:54:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2023-08-04 09:54:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929676511954993 [2023-08-04 09:54:50,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2023-08-04 09:54:50,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2023-08-04 09:54:50,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:50,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2023-08-04 09:54:50,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:50,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:50,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:50,791 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 230 flow. Second operand 3 states and 701 transitions. [2023-08-04 09:54:50,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 590 flow [2023-08-04 09:54:50,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 574 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:54:50,921 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 255 flow [2023-08-04 09:54:50,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-08-04 09:54:50,921 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-04 09:54:50,921 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 255 flow [2023-08-04 09:54:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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 09:54:50,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:50,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:54:50,922 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:50,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1236209024, now seen corresponding path program 1 times [2023-08-04 09:54:50,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771060292] [2023-08-04 09:54:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:54:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771060292] [2023-08-04 09:54:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771060292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:51,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:51,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:54:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520066725] [2023-08-04 09:54:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:51,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:54:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:54:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:54:51,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 474 [2023-08-04 09:54:51,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 09:54:51,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:51,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 474 [2023-08-04 09:54:51,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:57,014 INFO L124 PetriNetUnfolderBase]: 72532/95540 cut-off events. [2023-08-04 09:54:57,014 INFO L125 PetriNetUnfolderBase]: For 51972/51984 co-relation queries the response was YES. [2023-08-04 09:54:57,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233724 conditions, 95540 events. 72532/95540 cut-off events. For 51972/51984 co-relation queries the response was YES. Maximal size of possible extension queue 2901. Compared 602366 event pairs, 26522 based on Foata normal form. 4/78379 useless extension candidates. Maximal degree in co-relation 233695. Up to 48864 conditions per place. [2023-08-04 09:54:57,580 INFO L140 encePairwiseOnDemand]: 468/474 looper letters, 142 selfloop transitions, 4 changer transitions 3/157 dead transitions. [2023-08-04 09:54:57,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 157 transitions, 928 flow [2023-08-04 09:54:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 938 transitions. [2023-08-04 09:54:57,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947257383966245 [2023-08-04 09:54:57,583 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 938 transitions. [2023-08-04 09:54:57,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 938 transitions. [2023-08-04 09:54:57,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:57,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 938 transitions. [2023-08-04 09:54:57,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 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 09:54:57,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:57,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:54:57,588 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 255 flow. Second operand 4 states and 938 transitions. [2023-08-04 09:54:57,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 157 transitions, 928 flow [2023-08-04 09:54:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 157 transitions, 917 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:58,169 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 279 flow [2023-08-04 09:54:58,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-04 09:54:58,170 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2023-08-04 09:54:58,170 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 279 flow [2023-08-04 09:54:58,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 09:54:58,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:58,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:58,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 09:54:58,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:58,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -331171508, now seen corresponding path program 1 times [2023-08-04 09:54:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:58,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229841907] [2023-08-04 09:54:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:54:58,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:58,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229841907] [2023-08-04 09:54:58,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229841907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:58,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:58,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:54:58,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520950459] [2023-08-04 09:54:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:54:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:54:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:54:58,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-08-04 09:54:58,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 09:54:58,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:58,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-08-04 09:54:58,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:06,084 INFO L124 PetriNetUnfolderBase]: 87098/115319 cut-off events. [2023-08-04 09:55:06,084 INFO L125 PetriNetUnfolderBase]: For 97746/100690 co-relation queries the response was YES. [2023-08-04 09:55:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314182 conditions, 115319 events. 87098/115319 cut-off events. For 97746/100690 co-relation queries the response was YES. Maximal size of possible extension queue 3800. Compared 742060 event pairs, 23589 based on Foata normal form. 5081/120400 useless extension candidates. Maximal degree in co-relation 314151. Up to 82945 conditions per place. [2023-08-04 09:55:06,807 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 124 selfloop transitions, 7 changer transitions 4/143 dead transitions. [2023-08-04 09:55:06,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 143 transitions, 880 flow [2023-08-04 09:55:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:55:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:55:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-08-04 09:55:06,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48364978902953587 [2023-08-04 09:55:06,810 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-08-04 09:55:06,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-08-04 09:55:06,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:06,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-08-04 09:55:06,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 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 09:55:06,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:55:06,814 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:55:06,814 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 279 flow. Second operand 4 states and 917 transitions. [2023-08-04 09:55:06,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 143 transitions, 880 flow [2023-08-04 09:55:06,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 143 transitions, 875 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:07,000 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 344 flow [2023-08-04 09:55:07,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-08-04 09:55:07,001 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2023-08-04 09:55:07,001 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 344 flow [2023-08-04 09:55:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 09:55:07,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:07,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:07,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:55:07,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:07,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1595862173, now seen corresponding path program 1 times [2023-08-04 09:55:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:07,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421773625] [2023-08-04 09:55:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:07,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:55:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421773625] [2023-08-04 09:55:07,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421773625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:07,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:55:07,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:55:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813934127] [2023-08-04 09:55:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:55:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:55:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:07,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 474 [2023-08-04 09:55:07,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 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 09:55:07,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:07,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 474 [2023-08-04 09:55:07,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:24,115 INFO L124 PetriNetUnfolderBase]: 146821/201191 cut-off events. [2023-08-04 09:55:24,116 INFO L125 PetriNetUnfolderBase]: For 253456/257672 co-relation queries the response was YES. [2023-08-04 09:55:24,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583934 conditions, 201191 events. 146821/201191 cut-off events. For 253456/257672 co-relation queries the response was YES. Maximal size of possible extension queue 5768. Compared 1423217 event pairs, 68750 based on Foata normal form. 9280/209976 useless extension candidates. Maximal degree in co-relation 583901. Up to 99180 conditions per place. [2023-08-04 09:55:25,500 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 194 selfloop transitions, 5 changer transitions 6/213 dead transitions. [2023-08-04 09:55:25,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 213 transitions, 1410 flow [2023-08-04 09:55:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:55:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:55:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1165 transitions. [2023-08-04 09:55:25,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49156118143459915 [2023-08-04 09:55:25,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1165 transitions. [2023-08-04 09:55:25,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1165 transitions. [2023-08-04 09:55:25,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:25,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1165 transitions. [2023-08-04 09:55:25,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 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 09:55:25,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 474.0) internal successors, (2844), 6 states have internal predecessors, (2844), 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 09:55:25,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 474.0) internal successors, (2844), 6 states have internal predecessors, (2844), 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 09:55:25,508 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 344 flow. Second operand 5 states and 1165 transitions. [2023-08-04 09:55:25,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 213 transitions, 1410 flow [2023-08-04 09:55:29,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 213 transitions, 1410 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:55:29,328 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 401 flow [2023-08-04 09:55:29,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2023-08-04 09:55:29,328 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2023-08-04 09:55:29,328 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 401 flow [2023-08-04 09:55:29,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 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 09:55:29,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:29,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 09:55:29,329 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:29,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1529006911, now seen corresponding path program 1 times [2023-08-04 09:55:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:29,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741437974] [2023-08-04 09:55:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:55:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741437974] [2023-08-04 09:55:29,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741437974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:29,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:55:29,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:55:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688693870] [2023-08-04 09:55:29,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:29,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:55:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:55:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:55:29,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-08-04 09:55:29,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 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 09:55:29,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:29,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-08-04 09:55:29,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:51,380 INFO L124 PetriNetUnfolderBase]: 195853/267666 cut-off events. [2023-08-04 09:55:51,380 INFO L125 PetriNetUnfolderBase]: For 545241/559321 co-relation queries the response was YES. [2023-08-04 09:55:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895315 conditions, 267666 events. 195853/267666 cut-off events. For 545241/559321 co-relation queries the response was YES. Maximal size of possible extension queue 7534. Compared 1967030 event pairs, 98260 based on Foata normal form. 14928/280603 useless extension candidates. Maximal degree in co-relation 895278. Up to 134969 conditions per place. [2023-08-04 09:55:53,611 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 142 selfloop transitions, 14 changer transitions 4/169 dead transitions. [2023-08-04 09:55:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 169 transitions, 1195 flow [2023-08-04 09:55:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:55:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:55:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 922 transitions. [2023-08-04 09:55:53,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48628691983122363 [2023-08-04 09:55:53,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 922 transitions. [2023-08-04 09:55:53,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 922 transitions. [2023-08-04 09:55:53,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:53,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 922 transitions. [2023-08-04 09:55:53,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 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 09:55:53,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:55:53,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:55:53,616 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 401 flow. Second operand 4 states and 922 transitions. [2023-08-04 09:55:53,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 169 transitions, 1195 flow [2023-08-04 09:55:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 169 transitions, 1188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:57,061 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 536 flow [2023-08-04 09:55:57,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2023-08-04 09:55:57,061 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 36 predicate places. [2023-08-04 09:55:57,062 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 536 flow [2023-08-04 09:55:57,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 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 09:55:57,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:57,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:57,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:55:57,062 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:57,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2079197966, now seen corresponding path program 1 times [2023-08-04 09:55:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488699844] [2023-08-04 09:55:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:55:57,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488699844] [2023-08-04 09:55:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488699844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:57,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:55:57,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:55:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001872579] [2023-08-04 09:55:57,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:57,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:55:57,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:55:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:57,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 474 [2023-08-04 09:55:57,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 205.8) internal successors, (1029), 5 states have internal predecessors, (1029), 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 09:55:57,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:57,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 474 [2023-08-04 09:55:57,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:34,115 INFO L124 PetriNetUnfolderBase]: 306472/427291 cut-off events. [2023-08-04 09:56:34,115 INFO L125 PetriNetUnfolderBase]: For 1226731/1251844 co-relation queries the response was YES. [2023-08-04 09:56:35,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492324 conditions, 427291 events. 306472/427291 cut-off events. For 1226731/1251844 co-relation queries the response was YES. Maximal size of possible extension queue 10043. Compared 3347834 event pairs, 147160 based on Foata normal form. 26342/448669 useless extension candidates. Maximal degree in co-relation 1492285. Up to 260535 conditions per place. [2023-08-04 09:56:38,356 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 202 selfloop transitions, 4 changer transitions 0/215 dead transitions. [2023-08-04 09:56:38,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 215 transitions, 1722 flow [2023-08-04 09:56:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:56:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:56:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1139 transitions. [2023-08-04 09:56:38,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805907172995781 [2023-08-04 09:56:38,359 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1139 transitions. [2023-08-04 09:56:38,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1139 transitions. [2023-08-04 09:56:38,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:38,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1139 transitions. [2023-08-04 09:56:38,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 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 09:56:38,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 474.0) internal successors, (2844), 6 states have internal predecessors, (2844), 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 09:56:38,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 474.0) internal successors, (2844), 6 states have internal predecessors, (2844), 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 09:56:38,375 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 536 flow. Second operand 5 states and 1139 transitions. [2023-08-04 09:56:38,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 215 transitions, 1722 flow [2023-08-04 09:56:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 215 transitions, 1704 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:59,581 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 602 flow [2023-08-04 09:56:59,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=602, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-04 09:56:59,582 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 42 predicate places. [2023-08-04 09:56:59,582 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 602 flow [2023-08-04 09:56:59,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.8) internal successors, (1029), 5 states have internal predecessors, (1029), 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 09:56:59,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:59,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 09:56:59,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:59,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -926190288, now seen corresponding path program 2 times [2023-08-04 09:56:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266768045] [2023-08-04 09:56:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:56:59,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:59,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266768045] [2023-08-04 09:56:59,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266768045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:59,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:56:59,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:56:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761973582] [2023-08-04 09:56:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:56:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:56:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:56:59,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-08-04 09:56:59,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 602 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 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 09:56:59,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:59,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-08-04 09:56:59,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:35,125 INFO L124 PetriNetUnfolderBase]: 273665/377285 cut-off events. [2023-08-04 09:57:35,125 INFO L125 PetriNetUnfolderBase]: For 1529750/1556878 co-relation queries the response was YES. [2023-08-04 09:57:36,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464034 conditions, 377285 events. 273665/377285 cut-off events. For 1529750/1556878 co-relation queries the response was YES. Maximal size of possible extension queue 9434. Compared 2865471 event pairs, 147949 based on Foata normal form. 20029/391864 useless extension candidates. Maximal degree in co-relation 1463992. Up to 214287 conditions per place. [2023-08-04 09:57:39,105 INFO L140 encePairwiseOnDemand]: 468/474 looper letters, 115 selfloop transitions, 6 changer transitions 24/155 dead transitions. [2023-08-04 09:57:39,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 155 transitions, 1248 flow [2023-08-04 09:57:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 909 transitions. [2023-08-04 09:57:39,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47943037974683544 [2023-08-04 09:57:39,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 909 transitions. [2023-08-04 09:57:39,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 909 transitions. [2023-08-04 09:57:39,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:39,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 909 transitions. [2023-08-04 09:57:39,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 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 09:57:39,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:57:39,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:57:39,113 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 602 flow. Second operand 4 states and 909 transitions. [2023-08-04 09:57:39,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 155 transitions, 1248 flow [2023-08-04 09:57:53,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 155 transitions, 1245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:57:53,865 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 626 flow [2023-08-04 09:57:53,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=626, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2023-08-04 09:57:53,866 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 46 predicate places. [2023-08-04 09:57:53,866 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 626 flow [2023-08-04 09:57:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 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 09:57:53,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:53,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:57:53,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 09:57:53,866 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:53,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash 999879561, now seen corresponding path program 1 times [2023-08-04 09:57:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448796772] [2023-08-04 09:57:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:57:53,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:53,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448796772] [2023-08-04 09:57:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448796772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:57:53,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:57:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:57:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693008447] [2023-08-04 09:57:53,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:57:53,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:57:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:57:53,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:57:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-08-04 09:57:54,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 89 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 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 09:57:54,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:54,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-08-04 09:57:54,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:58:48,349 INFO L124 PetriNetUnfolderBase]: 348586/479608 cut-off events. [2023-08-04 09:58:48,349 INFO L125 PetriNetUnfolderBase]: For 2221111/2260245 co-relation queries the response was YES. [2023-08-04 09:58:51,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917875 conditions, 479608 events. 348586/479608 cut-off events. For 2221111/2260245 co-relation queries the response was YES. Maximal size of possible extension queue 11772. Compared 3727228 event pairs, 173236 based on Foata normal form. 32626/504280 useless extension candidates. Maximal degree in co-relation 1917831. Up to 373965 conditions per place. [2023-08-04 09:58:54,264 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 129 selfloop transitions, 9 changer transitions 14/163 dead transitions. [2023-08-04 09:58:54,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1405 flow [2023-08-04 09:58:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:58:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:58:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 913 transitions. [2023-08-04 09:58:54,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48154008438818563 [2023-08-04 09:58:54,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 913 transitions. [2023-08-04 09:58:54,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 913 transitions. [2023-08-04 09:58:54,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:58:54,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 913 transitions. [2023-08-04 09:58:54,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 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 09:58:54,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:58:54,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 09:58:54,270 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 626 flow. Second operand 4 states and 913 transitions. [2023-08-04 09:58:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1405 flow [2023-08-04 09:59:42,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 163 transitions, 1379 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-04 09:59:42,382 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 651 flow [2023-08-04 09:59:42,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=651, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2023-08-04 09:59:42,383 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-04 09:59:42,383 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 651 flow [2023-08-04 09:59:42,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 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 09:59:42,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:42,383 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:59:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 09:59:42,383 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:42,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1348566939, now seen corresponding path program 1 times [2023-08-04 09:59:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73096092] [2023-08-04 09:59:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:59:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73096092] [2023-08-04 09:59:42,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73096092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:42,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:42,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:59:42,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569587594] [2023-08-04 09:59:42,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:42,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:59:42,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:59:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:59:42,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 474 [2023-08-04 09:59:42,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 651 flow. Second operand has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 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 09:59:42,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:42,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 474 [2023-08-04 09:59:42,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:00:45,548 INFO L124 PetriNetUnfolderBase]: 413213/562652 cut-off events. [2023-08-04 10:00:45,548 INFO L125 PetriNetUnfolderBase]: For 2568818/2613987 co-relation queries the response was YES. [2023-08-04 10:00:48,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276916 conditions, 562652 events. 413213/562652 cut-off events. For 2568818/2613987 co-relation queries the response was YES. Maximal size of possible extension queue 13580. Compared 4346832 event pairs, 188984 based on Foata normal form. 46046/601839 useless extension candidates. Maximal degree in co-relation 2276871. Up to 420660 conditions per place. [2023-08-04 10:00:50,890 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 138 selfloop transitions, 10 changer transitions 16/175 dead transitions. [2023-08-04 10:00:50,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1502 flow [2023-08-04 10:00:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:00:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:00:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 924 transitions. [2023-08-04 10:00:50,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873417721518987 [2023-08-04 10:00:50,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 924 transitions. [2023-08-04 10:00:50,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 924 transitions. [2023-08-04 10:00:50,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:00:50,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 924 transitions. [2023-08-04 10:00:50,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 10:00:50,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 10:00:50,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 10:00:50,896 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 651 flow. Second operand 4 states and 924 transitions. [2023-08-04 10:00:50,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1502 flow [2023-08-04 10:01:54,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 175 transitions, 1495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:01:54,749 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 695 flow [2023-08-04 10:01:54,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=695, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2023-08-04 10:01:54,750 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 51 predicate places. [2023-08-04 10:01:54,750 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 695 flow [2023-08-04 10:01:54,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 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 10:01:54,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:01:54,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:01:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 10:01:54,750 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:01:54,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:01:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1969429715, now seen corresponding path program 2 times [2023-08-04 10:01:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:01:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188348044] [2023-08-04 10:01:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:01:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 10:01:54,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:01:54,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188348044] [2023-08-04 10:01:54,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188348044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:01:54,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:01:54,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 10:01:54,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180770448] [2023-08-04 10:01:54,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:01:54,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 10:01:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:01:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 10:01:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 10:01:54,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 474 [2023-08-04 10:01:54,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 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 10:01:54,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:01:54,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 474 [2023-08-04 10:01:54,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:12,109 INFO L124 PetriNetUnfolderBase]: 514986/699467 cut-off events. [2023-08-04 10:03:12,109 INFO L125 PetriNetUnfolderBase]: For 3335595/3387847 co-relation queries the response was YES. [2023-08-04 10:03:16,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2891745 conditions, 699467 events. 514986/699467 cut-off events. For 3335595/3387847 co-relation queries the response was YES. Maximal size of possible extension queue 16295. Compared 5441477 event pairs, 230404 based on Foata normal form. 56931/749496 useless extension candidates. Maximal degree in co-relation 2891698. Up to 525240 conditions per place. [2023-08-04 10:03:19,067 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 142 selfloop transitions, 10 changer transitions 16/179 dead transitions. [2023-08-04 10:03:19,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 179 transitions, 1586 flow [2023-08-04 10:03:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:03:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:03:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 924 transitions. [2023-08-04 10:03:19,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873417721518987 [2023-08-04 10:03:19,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 924 transitions. [2023-08-04 10:03:19,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 924 transitions. [2023-08-04 10:03:19,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:19,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 924 transitions. [2023-08-04 10:03:19,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 10:03:19,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 10:03:19,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 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 10:03:19,074 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 695 flow. Second operand 4 states and 924 transitions. [2023-08-04 10:03:19,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 179 transitions, 1586 flow Received shutdown request... [2023-08-04 10:04:05,316 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 10:04:06,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown