/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-cond-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:59:26,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:59:27,066 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:59:27,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:59:27,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:59:27,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:59:27,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:59:27,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:59:27,102 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:59:27,102 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:59:27,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:59:27,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:59:27,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:59:27,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:59:27,104 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:59:27,104 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:59:27,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:59:27,105 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:59:27,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:59:27,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:59:27,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:59:27,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:59:27,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:59:27,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:59:27,107 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:59:27,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:59:27,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:59:27,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:59:27,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:59:27,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:59:27,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:59:27,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:59:27,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:59:27,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:59:27,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:59:27,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:59:27,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:59:27,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:59:27,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:59:27,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:59:27,110 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:59:27,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:59:27,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:59:27,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:59:27,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:59:27,372 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:59:27,373 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:59:27,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 09:59:28,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:59:28,754 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:59:28,755 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 09:59:28,766 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b621be970/5a27adc5a7fa465296437f16a840c23d/FLAG77eaa419f [2023-08-04 09:59:28,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b621be970/5a27adc5a7fa465296437f16a840c23d [2023-08-04 09:59:28,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:59:28,791 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:59:28,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:59:28,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:59:28,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:59:28,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:59:28" (1/1) ... [2023-08-04 09:59:28,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9d5c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:28, skipping insertion in model container [2023-08-04 09:59:28,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:59:28" (1/1) ... [2023-08-04 09:59:28,825 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:59:28,987 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-cond-3.wvr_bound2.c[2803,2816] [2023-08-04 09:59:28,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:59:28,999 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:59:29,020 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-cond-3.wvr_bound2.c[2803,2816] [2023-08-04 09:59:29,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:59:29,035 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:59:29,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29 WrapperNode [2023-08-04 09:59:29,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:59:29,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:59:29,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:59:29,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:59:29,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,071 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 197 [2023-08-04 09:59:29,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:59:29,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:59:29,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:59:29,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:59:29,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:59:29,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:59:29,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:59:29,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:59:29,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (1/1) ... [2023-08-04 09:59:29,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:59:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:29,126 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 09:59:29,127 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 09:59:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:59:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:59:29,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:59:29,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:59:29,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:59:29,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:59:29,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:59:29,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:59:29,158 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 09:59:29,265 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:59:29,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:59:29,507 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:59:29,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:59:29,515 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:59:29,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:59:29 BoogieIcfgContainer [2023-08-04 09:59:29,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:59:29,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:59:29,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:59:29,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:59:29,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:59:28" (1/3) ... [2023-08-04 09:59:29,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bfddee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:59:29, skipping insertion in model container [2023-08-04 09:59:29,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:59:29" (2/3) ... [2023-08-04 09:59:29,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bfddee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:59:29, skipping insertion in model container [2023-08-04 09:59:29,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:59:29" (3/3) ... [2023-08-04 09:59:29,534 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 09:59:29,542 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:59:29,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:59:29,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:59:29,553 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:59:29,699 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:59:29,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,896 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 09:59:29,897 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:59:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 09:59:29,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,919 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:59:29,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:29,982 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 09:59:29,982 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:59:29,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 09:59:29,995 INFO L119 LiptonReduction]: Number of co-enabled transitions 12406 [2023-08-04 09:59:34,781 INFO L134 LiptonReduction]: Checked pairs total: 16182 [2023-08-04 09:59:34,781 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-04 09:59:34,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:59:34,798 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;@15a4dd04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:59:34,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:59:34,801 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:59:34,801 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 09:59:34,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:59:34,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:34,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:59:34,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:34,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1367025840, now seen corresponding path program 1 times [2023-08-04 09:59:34,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:34,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026375056] [2023-08-04 09:59:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:35,008 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 09:59:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026375056] [2023-08-04 09:59:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026375056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:35,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:59:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016624790] [2023-08-04 09:59:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:35,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:59:35,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 09:59:35,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 09:59:35,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:35,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 09:59:35,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:35,296 INFO L124 PetriNetUnfolderBase]: 1046/1573 cut-off events. [2023-08-04 09:59:35,297 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 09:59:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1573 events. 1046/1573 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7165 event pairs, 443 based on Foata normal form. 0/1012 useless extension candidates. Maximal degree in co-relation 2701. Up to 1523 conditions per place. [2023-08-04 09:59:35,305 INFO L140 encePairwiseOnDemand]: 452/457 looper letters, 37 selfloop transitions, 2 changer transitions 3/46 dead transitions. [2023-08-04 09:59:35,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 194 flow [2023-08-04 09:59:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-04 09:59:35,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46097738876732314 [2023-08-04 09:59:35,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-04 09:59:35,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-04 09:59:35,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:35,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-04 09:59:35,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 09:59:35,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:35,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:35,343 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 110 flow. Second operand 3 states and 632 transitions. [2023-08-04 09:59:35,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 194 flow [2023-08-04 09:59:35,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:59:35,351 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 106 flow [2023-08-04 09:59:35,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-04 09:59:35,357 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 09:59:35,358 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 106 flow [2023-08-04 09:59:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 09:59:35,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:35,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:59:35,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:59:35,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:35,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1596776980, now seen corresponding path program 1 times [2023-08-04 09:59:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:35,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502112233] [2023-08-04 09:59:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:35,489 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 09:59:35,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502112233] [2023-08-04 09:59:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502112233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:59:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404893956] [2023-08-04 09:59:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:35,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:59:35,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:35,493 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 09:59:35,499 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 09:59:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:35,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:59:35,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:59:35,574 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 09:59:35,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:59:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404893956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:35,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:59:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:59:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018550541] [2023-08-04 09:59:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:59:35,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 09:59:35,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 09:59:35,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:35,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 09:59:35,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:35,788 INFO L124 PetriNetUnfolderBase]: 1042/1559 cut-off events. [2023-08-04 09:59:35,788 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 09:59:35,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1559 events. 1042/1559 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7201 event pairs, 289 based on Foata normal form. 0/1011 useless extension candidates. Maximal degree in co-relation 2671. Up to 1405 conditions per place. [2023-08-04 09:59:35,796 INFO L140 encePairwiseOnDemand]: 454/457 looper letters, 49 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2023-08-04 09:59:35,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 242 flow [2023-08-04 09:59:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 09:59:35,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675419401896426 [2023-08-04 09:59:35,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 09:59:35,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 09:59:35,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:35,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 09:59:35,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 09:59:35,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:35,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:35,804 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 106 flow. Second operand 3 states and 641 transitions. [2023-08-04 09:59:35,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 242 flow [2023-08-04 09:59:35,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:59:35,806 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 104 flow [2023-08-04 09:59:35,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2023-08-04 09:59:35,807 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-04 09:59:35,807 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 104 flow [2023-08-04 09:59:35,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 09:59:35,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:35,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:59:35,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:59:36,013 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 09:59:36,014 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:36,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -50780128, now seen corresponding path program 1 times [2023-08-04 09:59:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106259994] [2023-08-04 09:59:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:36,065 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 09:59:36,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106259994] [2023-08-04 09:59:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106259994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:59:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883953646] [2023-08-04 09:59:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:59:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:36,069 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 09:59:36,089 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 09:59:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:36,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:59:36,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:59:36,146 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 09:59:36,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:59:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883953646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:36,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:59:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:59:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447116817] [2023-08-04 09:59:36,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:36,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:36,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:59:36,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 09:59:36,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 09:59:36,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:36,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 09:59:36,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:36,315 INFO L124 PetriNetUnfolderBase]: 662/1019 cut-off events. [2023-08-04 09:59:36,315 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-04 09:59:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 1019 events. 662/1019 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4298 event pairs, 248 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 934. Up to 645 conditions per place. [2023-08-04 09:59:36,320 INFO L140 encePairwiseOnDemand]: 454/457 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 09:59:36,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 256 flow [2023-08-04 09:59:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-04 09:59:36,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697301239970824 [2023-08-04 09:59:36,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-04 09:59:36,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-04 09:59:36,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:36,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-04 09:59:36,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 09:59:36,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:36,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:36,328 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 104 flow. Second operand 3 states and 644 transitions. [2023-08-04 09:59:36,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 256 flow [2023-08-04 09:59:36,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:59:36,331 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 112 flow [2023-08-04 09:59:36,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2023-08-04 09:59:36,331 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-04 09:59:36,332 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 112 flow [2023-08-04 09:59:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 09:59:36,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:36,332 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 09:59:36,345 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 09:59:36,538 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 09:59:36,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:36,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 306910112, now seen corresponding path program 1 times [2023-08-04 09:59:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117441914] [2023-08-04 09:59:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:36,629 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 09:59:36,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:36,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117441914] [2023-08-04 09:59:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117441914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:59:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798472213] [2023-08-04 09:59:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:59:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:36,631 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 09:59:36,634 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 09:59:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:36,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:59:36,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:59:36,711 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 09:59:36,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:59:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798472213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:36,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:59:36,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:59:36,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625532768] [2023-08-04 09:59:36,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:59:36,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 09:59:36,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 09:59:36,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:36,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 09:59:36,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:36,883 INFO L124 PetriNetUnfolderBase]: 641/983 cut-off events. [2023-08-04 09:59:36,883 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-08-04 09:59:36,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 983 events. 641/983 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3986 event pairs, 369 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 975. Up to 890 conditions per place. [2023-08-04 09:59:36,888 INFO L140 encePairwiseOnDemand]: 454/457 looper letters, 49 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2023-08-04 09:59:36,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 250 flow [2023-08-04 09:59:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 09:59:36,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675419401896426 [2023-08-04 09:59:36,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 09:59:36,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 09:59:36,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:36,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 09:59:36,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 09:59:36,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:36,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:36,904 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 112 flow. Second operand 3 states and 641 transitions. [2023-08-04 09:59:36,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 250 flow [2023-08-04 09:59:36,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:59:36,909 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 114 flow [2023-08-04 09:59:36,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-04 09:59:36,911 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 09:59:36,911 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 114 flow [2023-08-04 09:59:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 09:59:36,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:36,912 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 09:59:36,918 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 09:59:37,117 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 09:59:37,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:37,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1435420523, now seen corresponding path program 1 times [2023-08-04 09:59:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:37,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78522664] [2023-08-04 09:59:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:37,197 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 09:59:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78522664] [2023-08-04 09:59:37,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78522664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:59:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281242837] [2023-08-04 09:59:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:59:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:37,201 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 09:59:37,204 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 09:59:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:37,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:59:37,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:59:37,313 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 09:59:37,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:59:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281242837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:37,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:59:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:59:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496848529] [2023-08-04 09:59:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:59:37,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 09:59:37,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 09:59:37,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:37,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 09:59:37,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:37,455 INFO L124 PetriNetUnfolderBase]: 641/980 cut-off events. [2023-08-04 09:59:37,455 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-04 09:59:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2156 conditions, 980 events. 641/980 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3980 event pairs, 395 based on Foata normal form. 1/736 useless extension candidates. Maximal degree in co-relation 1961. Up to 960 conditions per place. [2023-08-04 09:59:37,461 INFO L140 encePairwiseOnDemand]: 454/457 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 09:59:37,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 190 flow [2023-08-04 09:59:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 09:59:37,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566010211524435 [2023-08-04 09:59:37,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 09:59:37,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 09:59:37,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:37,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 09:59:37,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 09:59:37,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:37,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 09:59:37,469 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 114 flow. Second operand 3 states and 626 transitions. [2023-08-04 09:59:37,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 190 flow [2023-08-04 09:59:37,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:59:37,471 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 122 flow [2023-08-04 09:59:37,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-04 09:59:37,472 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 09:59:37,472 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 122 flow [2023-08-04 09:59:37,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 09:59:37,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:37,473 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 09:59:37,483 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 09:59:37,679 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 09:59:37,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:37,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash -977819233, now seen corresponding path program 1 times [2023-08-04 09:59:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574240480] [2023-08-04 09:59:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:37,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:37,763 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 09:59:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574240480] [2023-08-04 09:59:37,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574240480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:59:37,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39128582] [2023-08-04 09:59:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:37,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:59:37,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:59:37,765 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 09:59:37,767 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 09:59:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:37,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:59:37,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:59:37,859 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 09:59:37,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:59:37,879 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 09:59:37,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39128582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:59:37,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:59:37,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:59:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093662703] [2023-08-04 09:59:37,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:59:37,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:59:37,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:59:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:59:37,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 457 [2023-08-04 09:59:37,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states 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 09:59:37,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:37,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 457 [2023-08-04 09:59:37,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:37,915 INFO L124 PetriNetUnfolderBase]: 11/27 cut-off events. [2023-08-04 09:59:37,915 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:59:37,915 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 5. Compared 38 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 09:59:37,915 INFO L140 encePairwiseOnDemand]: 454/457 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:59:37,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 72 flow [2023-08-04 09:59:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:59:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:59:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 794 transitions. [2023-08-04 09:59:37,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43435448577680524 [2023-08-04 09:59:37,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 794 transitions. [2023-08-04 09:59:37,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 794 transitions. [2023-08-04 09:59:37,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:37,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 794 transitions. [2023-08-04 09:59:37,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 09:59:37,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states 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 09:59:37,924 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states 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 09:59:37,924 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 122 flow. Second operand 4 states and 794 transitions. [2023-08-04 09:59:37,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 72 flow [2023-08-04 09:59:37,925 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 09:59:37,925 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 09:59:37,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, 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 09:59:37,926 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -20 predicate places. [2023-08-04 09:59:37,926 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 09:59:37,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states 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 09:59:37,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:59:37,938 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 09:59:38,135 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 09:59:38,136 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:59:38,137 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:59:38,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,174 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 09:59:38,174 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:59:38,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 09:59:38,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:59:38,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 09:59:38,211 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 09:59:38,211 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:59:38,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 09:59:38,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 12406 [2023-08-04 09:59:42,604 INFO L134 LiptonReduction]: Checked pairs total: 16298 [2023-08-04 09:59:42,604 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-04 09:59:42,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:59:42,607 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;@15a4dd04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:59:42,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:59:42,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:59:42,610 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 09:59:42,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:59:42,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:42,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:59:42,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:59:42,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1115321804, now seen corresponding path program 1 times [2023-08-04 09:59:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:42,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103264654] [2023-08-04 09:59:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:42,670 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 09:59:42,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:42,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103264654] [2023-08-04 09:59:42,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103264654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:42,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:42,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:59:42,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902676587] [2023-08-04 09:59:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:42,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:59:42,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 453 [2023-08-04 09:59:42,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 09:59:42,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:42,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 453 [2023-08-04 09:59:42,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:42,835 INFO L124 PetriNetUnfolderBase]: 1095/1666 cut-off events. [2023-08-04 09:59:42,835 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 09:59:42,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1666 events. 1095/1666 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7864 event pairs, 659 based on Foata normal form. 0/1078 useless extension candidates. Maximal degree in co-relation 2704. Up to 1613 conditions per place. [2023-08-04 09:59:42,841 INFO L140 encePairwiseOnDemand]: 447/453 looper letters, 24 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-08-04 09:59:42,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 182 flow [2023-08-04 09:59:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:59:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:59:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-04 09:59:42,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628403237674761 [2023-08-04 09:59:42,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-04 09:59:42,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-04 09:59:42,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:42,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-04 09:59:42,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 09:59:42,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 09:59:42,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 09:59:42,848 INFO L175 Difference]: Start difference. First operand has 40 places, 46 transitions, 114 flow. Second operand 3 states and 629 transitions. [2023-08-04 09:59:42,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 182 flow [2023-08-04 09:59:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:59:42,850 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 80 flow [2023-08-04 09:59:42,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-04 09:59:42,852 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-04 09:59:42,852 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 80 flow [2023-08-04 09:59:42,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 09:59:42,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:42,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:59:42,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:59:42,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:59:42,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1045639046, now seen corresponding path program 1 times [2023-08-04 09:59:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:42,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095231397] [2023-08-04 09:59:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:42,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:59:42,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:59:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:59:42,905 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:59:42,905 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:59:42,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:59:42,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:59:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:59:42,906 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:59:42,907 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:59:42,907 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:59:42,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:59:42,943 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:59:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,152 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 09:59:43,152 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:59:43,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7921 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 09:59:43,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:59:43,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 09:59:43,326 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 09:59:43,327 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:59:43,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7921 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 09:59:43,397 INFO L119 LiptonReduction]: Number of co-enabled transitions 44252 [2023-08-04 09:59:48,195 INFO L134 LiptonReduction]: Checked pairs total: 77618 [2023-08-04 09:59:48,195 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-08-04 09:59:48,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:59:48,197 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;@15a4dd04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:59:48,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:59:48,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:59:48,199 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:59:48,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:59:48,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:48,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:59:48,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:48,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash 142562245, now seen corresponding path program 1 times [2023-08-04 09:59:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:48,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874930687] [2023-08-04 09:59:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:48,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:48,220 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 09:59:48,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874930687] [2023-08-04 09:59:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874930687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:48,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:48,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:59:48,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614421442] [2023-08-04 09:59:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:48,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:59:48,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:59:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:59:48,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 648 [2023-08-04 09:59:48,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 09:59:48,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:48,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 648 [2023-08-04 09:59:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:00:30,503 INFO L124 PetriNetUnfolderBase]: 582625/716084 cut-off events. [2023-08-04 10:00:30,504 INFO L125 PetriNetUnfolderBase]: For 37859/37859 co-relation queries the response was YES. [2023-08-04 10:00:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443336 conditions, 716084 events. 582625/716084 cut-off events. For 37859/37859 co-relation queries the response was YES. Maximal size of possible extension queue 18231. Compared 4247533 event pairs, 330535 based on Foata normal form. 50753/495183 useless extension candidates. Maximal degree in co-relation 471540. Up to 711469 conditions per place. [2023-08-04 10:00:34,327 INFO L140 encePairwiseOnDemand]: 637/648 looper letters, 79 selfloop transitions, 2 changer transitions 2/91 dead transitions. [2023-08-04 10:00:34,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 392 flow [2023-08-04 10:00:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:00:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:00:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 936 transitions. [2023-08-04 10:00:34,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-04 10:00:34,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 936 transitions. [2023-08-04 10:00:34,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 936 transitions. [2023-08-04 10:00:34,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:00:34,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 936 transitions. [2023-08-04 10:00:34,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 10:00:34,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:00:34,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:00:34,338 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 234 flow. Second operand 3 states and 936 transitions. [2023-08-04 10:00:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 392 flow [2023-08-04 10:00:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 10:00:34,359 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 218 flow [2023-08-04 10:00:34,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2023-08-04 10:00:34,359 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 10:00:34,360 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 218 flow [2023-08-04 10:00:34,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 10:00:34,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:00:34,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:00:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 10:00:34,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:00:34,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:00:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 267691733, now seen corresponding path program 1 times [2023-08-04 10:00:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:00:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234377637] [2023-08-04 10:00:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:00:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:00:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:00:34,394 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 10:00:34,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:00:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234377637] [2023-08-04 10:00:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234377637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:00:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436717890] [2023-08-04 10:00:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:00:34,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:00:34,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:00:34,396 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 10:00:34,398 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 10:00:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:00:34,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:00:34,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:00:34,472 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 10:00:34,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:00:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436717890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:00:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:00:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 10:00:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892849275] [2023-08-04 10:00:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:00:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:00:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:00:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:00:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:00:34,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 648 [2023-08-04 10:00:34,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 10:00:34,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:00:34,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 648 [2023-08-04 10:00:34,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:01:15,549 INFO L124 PetriNetUnfolderBase]: 580364/717063 cut-off events. [2023-08-04 10:01:15,549 INFO L125 PetriNetUnfolderBase]: For 34152/34152 co-relation queries the response was YES. [2023-08-04 10:01:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441181 conditions, 717063 events. 580364/717063 cut-off events. For 34152/34152 co-relation queries the response was YES. Maximal size of possible extension queue 18537. Compared 4359293 event pairs, 286338 based on Foata normal form. 0/446030 useless extension candidates. Maximal degree in co-relation 770481. Up to 706580 conditions per place. [2023-08-04 10:01:20,931 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 104 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-04 10:01:20,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 490 flow [2023-08-04 10:01:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:01:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:01:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 952 transitions. [2023-08-04 10:01:20,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897119341563786 [2023-08-04 10:01:20,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 952 transitions. [2023-08-04 10:01:20,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 952 transitions. [2023-08-04 10:01:20,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:01:20,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 952 transitions. [2023-08-04 10:01:20,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 10:01:20,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:01:20,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:01:20,970 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 218 flow. Second operand 3 states and 952 transitions. [2023-08-04 10:01:20,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 490 flow [2023-08-04 10:01:21,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 114 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 10:01:21,198 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 222 flow [2023-08-04 10:01:21,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2023-08-04 10:01:21,200 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-04 10:01:21,200 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 222 flow [2023-08-04 10:01:21,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 10:01:21,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:01:21,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:01:21,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 10:01:21,405 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 10:01:21,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:01:21,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:01:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1148718024, now seen corresponding path program 1 times [2023-08-04 10:01:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:01:21,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672402931] [2023-08-04 10:01:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:01:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:21,443 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 10:01:21,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:01:21,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672402931] [2023-08-04 10:01:21,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672402931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:01:21,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103519823] [2023-08-04 10:01:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:21,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:01:21,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:01:21,445 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 10:01:21,447 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 10:01:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:21,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:01:21,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:01:21,549 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 10:01:21,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:01:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103519823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:01:21,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:01:21,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 10:01:21,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308723629] [2023-08-04 10:01:21,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:01:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:01:21,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:01:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:01:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:01:21,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 648 [2023-08-04 10:01:21,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 10:01:21,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:01:21,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 648 [2023-08-04 10:01:21,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:01:51,573 INFO L124 PetriNetUnfolderBase]: 420455/526888 cut-off events. [2023-08-04 10:01:51,573 INFO L125 PetriNetUnfolderBase]: For 32584/32584 co-relation queries the response was YES. [2023-08-04 10:01:52,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081916 conditions, 526888 events. 420455/526888 cut-off events. For 32584/32584 co-relation queries the response was YES. Maximal size of possible extension queue 12840. Compared 3310698 event pairs, 189573 based on Foata normal form. 0/349861 useless extension candidates. Maximal degree in co-relation 348001. Up to 346408 conditions per place. [2023-08-04 10:01:54,498 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 129 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2023-08-04 10:01:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 139 transitions, 602 flow [2023-08-04 10:01:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:01:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:01:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2023-08-04 10:01:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2023-08-04 10:01:54,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2023-08-04 10:01:54,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2023-08-04 10:01:54,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:01:54,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2023-08-04 10:01:54,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 10:01:54,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:01:54,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:01:54,505 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 222 flow. Second operand 3 states and 976 transitions. [2023-08-04 10:01:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 139 transitions, 602 flow [2023-08-04 10:01:54,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:01:54,566 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 232 flow [2023-08-04 10:01:54,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2023-08-04 10:01:54,567 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 10:01:54,567 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 232 flow [2023-08-04 10:01:54,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 10:01:54,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:01:54,567 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 10:01:54,573 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 10:01:54,769 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 10:01:54,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:01:54,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:01:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1588892596, now seen corresponding path program 1 times [2023-08-04 10:01:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:01:54,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627882912] [2023-08-04 10:01:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:01:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:54,804 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 10:01:54,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:01:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627882912] [2023-08-04 10:01:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627882912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:01:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303460014] [2023-08-04 10:01:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:54,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:01:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:01:54,806 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 10:01:54,811 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 10:01:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:54,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:01:54,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:01:54,904 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 10:01:54,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:01:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303460014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:01:54,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:01:54,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 10:01:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470608873] [2023-08-04 10:01:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:01:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:01:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:01:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:01:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:01:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 648 [2023-08-04 10:01:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 10:01:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:01:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 648 [2023-08-04 10:01:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:02:24,777 INFO L124 PetriNetUnfolderBase]: 405349/505951 cut-off events. [2023-08-04 10:02:24,778 INFO L125 PetriNetUnfolderBase]: For 111105/111105 co-relation queries the response was YES. [2023-08-04 10:02:25,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072483 conditions, 505951 events. 405349/505951 cut-off events. For 111105/111105 co-relation queries the response was YES. Maximal size of possible extension queue 12191. Compared 3073228 event pairs, 248743 based on Foata normal form. 0/344620 useless extension candidates. Maximal degree in co-relation 426072. Up to 444380 conditions per place. [2023-08-04 10:02:27,439 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 130 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2023-08-04 10:02:27,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 614 flow [2023-08-04 10:02:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:02:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:02:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2023-08-04 10:02:27,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2023-08-04 10:02:27,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2023-08-04 10:02:27,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2023-08-04 10:02:27,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:02:27,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2023-08-04 10:02:27,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 10:02:27,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:02:27,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:02:27,448 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 232 flow. Second operand 3 states and 976 transitions. [2023-08-04 10:02:27,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 614 flow [2023-08-04 10:02:32,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 612 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:02:32,588 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 242 flow [2023-08-04 10:02:32,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2023-08-04 10:02:32,589 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-08-04 10:02:32,589 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 242 flow [2023-08-04 10:02:32,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 10:02:32,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:02:32,589 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 10:02:32,594 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 10:02:32,790 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 10:02:32,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:02:32,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:02:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 338003730, now seen corresponding path program 1 times [2023-08-04 10:02:32,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:02:32,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163184194] [2023-08-04 10:02:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:02:32,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:02:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:02:32,834 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 10:02:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:02:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163184194] [2023-08-04 10:02:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163184194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:02:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910054013] [2023-08-04 10:02:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:02:32,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:02:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:02:32,836 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 10:02:32,842 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 10:02:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:02:32,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 10:02:32,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:02:32,938 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 10:02:32,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:02:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910054013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:02:32,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:02:32,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 10:02:32,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435387227] [2023-08-04 10:02:32,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:02:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:02:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:02:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:02:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:02:32,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 648 [2023-08-04 10:02:32,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states 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 10:02:32,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:02:32,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 648 [2023-08-04 10:02:32,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:01,692 INFO L124 PetriNetUnfolderBase]: 405349/505952 cut-off events. [2023-08-04 10:03:01,692 INFO L125 PetriNetUnfolderBase]: For 91436/91436 co-relation queries the response was YES. [2023-08-04 10:03:03,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1075159 conditions, 505952 events. 405349/505952 cut-off events. For 91436/91436 co-relation queries the response was YES. Maximal size of possible extension queue 12191. Compared 3067958 event pairs, 279282 based on Foata normal form. 1/345450 useless extension candidates. Maximal degree in co-relation 928020. Up to 500747 conditions per place. [2023-08-04 10:03:04,715 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 10:03:04,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 404 flow [2023-08-04 10:03:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 923 transitions. [2023-08-04 10:03:04,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747942386831276 [2023-08-04 10:03:04,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 923 transitions. [2023-08-04 10:03:04,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 923 transitions. [2023-08-04 10:03:04,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:04,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 923 transitions. [2023-08-04 10:03:04,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states 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 10:03:04,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:03:04,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 10:03:04,723 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 242 flow. Second operand 3 states and 923 transitions. [2023-08-04 10:03:04,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 404 flow [2023-08-04 10:03:15,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:03:15,174 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 252 flow [2023-08-04 10:03:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2023-08-04 10:03:15,175 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-08-04 10:03:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 252 flow [2023-08-04 10:03:15,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states 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 10:03:15,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:15,176 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, 1] [2023-08-04 10:03:15,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 10:03:15,381 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 10:03:15,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:15,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1336025776, now seen corresponding path program 1 times [2023-08-04 10:03:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159478625] [2023-08-04 10:03:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:15,425 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 10:03:15,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159478625] [2023-08-04 10:03:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159478625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750139634] [2023-08-04 10:03:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:15,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:15,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:15,427 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 10:03:15,430 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 10:03:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:15,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 10:03:15,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:15,524 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 10:03:15,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 10:03:15,541 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 10:03:15,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750139634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 10:03:15,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 10:03:15,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 10:03:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263097968] [2023-08-04 10:03:15,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 10:03:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 10:03:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 10:03:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:15,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 648 [2023-08-04 10:03:15,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 10:03:15,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:15,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 648 [2023-08-04 10:03:15,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand