/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/pthread_bigshot_s2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:36:29,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:36:29,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:36:29,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:36:29,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:36:29,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:36:29,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:36:29,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:36:29,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:36:29,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:36:29,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:36:29,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:36:29,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:36:29,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:36:29,903 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:36:29,903 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:36:29,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:36:29,904 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:36:29,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:36:29,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:36:29,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:36:29,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:36:29,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:36:29,906 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:36:29,906 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:36:29,906 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:36:29,907 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:36:29,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:36:29,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:36:29,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:36:29,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:36:29,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:36:29,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:36:29,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:36:29,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:36:29,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:36:29,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:36:29,910 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:36:29,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:36:29,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:36:29,911 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:36:29,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:36:30,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:36:30,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:36:30,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:36:30,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:36:30,127 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:36:30,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s2_bound2.i [2023-08-04 07:36:31,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:36:31,323 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:36:31,324 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s2_bound2.i [2023-08-04 07:36:31,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8bc901d/b6af68d77c1d4201b299ee565480e9b0/FLAGd4ecf71fd [2023-08-04 07:36:31,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8bc901d/b6af68d77c1d4201b299ee565480e9b0 [2023-08-04 07:36:31,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:36:31,353 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:36:31,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:36:31,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:36:31,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:36:31,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7718986a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31, skipping insertion in model container [2023-08-04 07:36:31,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,396 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:36:31,699 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s2_bound2.i[55203,55216] [2023-08-04 07:36:31,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:36:31,718 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:36:31,734 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 07:36:31,736 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 07:36:31,745 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s2_bound2.i[55203,55216] [2023-08-04 07:36:31,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:36:31,788 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:36:31,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31 WrapperNode [2023-08-04 07:36:31,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:36:31,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:36:31,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:36:31,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:36:31,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,835 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2023-08-04 07:36:31,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:36:31,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:36:31,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:36:31,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:36:31,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,850 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,875 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:36:31,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:36:31,876 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:36:31,876 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:36:31,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (1/1) ... [2023-08-04 07:36:31,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:36:31,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:31,908 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 07:36:31,914 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 07:36:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:36:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:36:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-08-04 07:36:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:36:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 07:36:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 07:36:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:36:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:36:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:36:31,938 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 07:36:32,082 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:36:32,084 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:36:32,293 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:36:32,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:36:32,300 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 07:36:32,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:36:32 BoogieIcfgContainer [2023-08-04 07:36:32,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:36:32,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:36:32,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:36:32,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:36:32,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:36:31" (1/3) ... [2023-08-04 07:36:32,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f38ef42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:36:32, skipping insertion in model container [2023-08-04 07:36:32,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:36:31" (2/3) ... [2023-08-04 07:36:32,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f38ef42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:36:32, skipping insertion in model container [2023-08-04 07:36:32,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:36:32" (3/3) ... [2023-08-04 07:36:32,308 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_bigshot_s2_bound2.i [2023-08-04 07:36:32,315 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:36:32,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:36:32,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:36:32,323 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:36:32,395 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:36:32,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 112 transitions, 246 flow [2023-08-04 07:36:32,482 INFO L124 PetriNetUnfolderBase]: 27/242 cut-off events. [2023-08-04 07:36:32,482 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:36:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 242 events. 27/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 865 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2023-08-04 07:36:32,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 112 transitions, 246 flow [2023-08-04 07:36:32,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 110 transitions, 237 flow [2023-08-04 07:36:32,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:36:32,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 110 transitions, 237 flow [2023-08-04 07:36:32,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 110 transitions, 237 flow [2023-08-04 07:36:32,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 110 transitions, 237 flow [2023-08-04 07:36:32,536 INFO L124 PetriNetUnfolderBase]: 27/241 cut-off events. [2023-08-04 07:36:32,537 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:36:32,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 241 events. 27/241 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 859 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2023-08-04 07:36:32,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 2304 [2023-08-04 07:36:34,651 INFO L134 LiptonReduction]: Checked pairs total: 4491 [2023-08-04 07:36:34,652 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 07:36:34,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:36:34,665 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;@3aaafb8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:36:34,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:36:34,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:36:34,667 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 07:36:34,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:36:34,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:34,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:36:34,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:34,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash 406102065, now seen corresponding path program 1 times [2023-08-04 07:36:34,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:34,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659369779] [2023-08-04 07:36:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:34,862 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 07:36:34,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:34,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659369779] [2023-08-04 07:36:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659369779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:34,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:36:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:36:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328862505] [2023-08-04 07:36:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:36:34,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2023-08-04 07:36:34,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 07:36:34,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:34,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2023-08-04 07:36:34,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:35,000 INFO L124 PetriNetUnfolderBase]: 310/586 cut-off events. [2023-08-04 07:36:35,000 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 07:36:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 586 events. 310/586 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2582 event pairs, 111 based on Foata normal form. 41/473 useless extension candidates. Maximal degree in co-relation 886. Up to 530 conditions per place. [2023-08-04 07:36:35,003 INFO L140 encePairwiseOnDemand]: 202/207 looper letters, 25 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-04 07:36:35,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 151 flow [2023-08-04 07:36:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-04 07:36:35,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152979066022544 [2023-08-04 07:36:35,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-04 07:36:35,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-04 07:36:35,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:35,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-04 07:36:35,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 07:36:35,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,023 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 85 flow. Second operand 3 states and 320 transitions. [2023-08-04 07:36:35,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 151 flow [2023-08-04 07:36:35,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:35,027 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 74 flow [2023-08-04 07:36:35,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-04 07:36:35,030 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 07:36:35,030 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 74 flow [2023-08-04 07:36:35,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 07:36:35,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:35,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:35,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:36:35,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:35,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash -943873221, now seen corresponding path program 1 times [2023-08-04 07:36:35,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:35,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573396465] [2023-08-04 07:36:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:35,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:35,135 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 07:36:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573396465] [2023-08-04 07:36:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573396465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062966915] [2023-08-04 07:36:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:35,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:35,138 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 07:36:35,165 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 07:36:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:35,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:35,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:35,215 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 07:36:35,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062966915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:35,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298159230] [2023-08-04 07:36:35,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:35,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2023-08-04 07:36:35,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 07:36:35,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:35,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2023-08-04 07:36:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:35,275 INFO L124 PetriNetUnfolderBase]: 36/93 cut-off events. [2023-08-04 07:36:35,275 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:36:35,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 93 events. 36/93 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 19 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 155. Up to 76 conditions per place. [2023-08-04 07:36:35,276 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 24 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 07:36:35,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 130 flow [2023-08-04 07:36:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-04 07:36:35,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040257648953301 [2023-08-04 07:36:35,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-04 07:36:35,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-04 07:36:35,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:35,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-04 07:36:35,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 07:36:35,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,281 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 74 flow. Second operand 3 states and 313 transitions. [2023-08-04 07:36:35,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 130 flow [2023-08-04 07:36:35,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:36:35,282 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 72 flow [2023-08-04 07:36:35,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-04 07:36:35,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-04 07:36:35,283 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 72 flow [2023-08-04 07:36:35,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 07:36:35,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:35,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:35,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:35,490 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 07:36:35,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:35,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2091177303, now seen corresponding path program 1 times [2023-08-04 07:36:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778308808] [2023-08-04 07:36:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:35,561 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 07:36:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778308808] [2023-08-04 07:36:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778308808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152078196] [2023-08-04 07:36:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:35,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:35,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:35,567 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 07:36:35,604 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 07:36:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:35,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:35,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:35,644 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 07:36:35,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:35,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152078196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:35,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740644499] [2023-08-04 07:36:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:35,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2023-08-04 07:36:35,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:36:35,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:35,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2023-08-04 07:36:35,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:35,698 INFO L124 PetriNetUnfolderBase]: 35/87 cut-off events. [2023-08-04 07:36:35,698 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:36:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 87 events. 35/87 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 8 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 136. Up to 78 conditions per place. [2023-08-04 07:36:35,699 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 27 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 07:36:35,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 144 flow [2023-08-04 07:36:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-04 07:36:35,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088566827697263 [2023-08-04 07:36:35,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-04 07:36:35,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-04 07:36:35,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:35,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-04 07:36:35,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 07:36:35,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:35,707 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 72 flow. Second operand 3 states and 316 transitions. [2023-08-04 07:36:35,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 144 flow [2023-08-04 07:36:35,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:35,709 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 76 flow [2023-08-04 07:36:35,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-08-04 07:36:35,710 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-08-04 07:36:35,710 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 76 flow [2023-08-04 07:36:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:36:35,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:35,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:35,723 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 07:36:35,921 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 07:36:35,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:35,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1631682666, now seen corresponding path program 1 times [2023-08-04 07:36:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:35,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40132939] [2023-08-04 07:36:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:35,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:36,027 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 07:36:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40132939] [2023-08-04 07:36:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40132939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048215575] [2023-08-04 07:36:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:36,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:36,029 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 07:36:36,078 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 07:36:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:36,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:36,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:36,150 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 07:36:36,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:36,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048215575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:36,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:36:36,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810859132] [2023-08-04 07:36:36,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:36,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:36,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:36,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2023-08-04 07:36:36,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 07:36:36,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:36,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2023-08-04 07:36:36,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:36,222 INFO L124 PetriNetUnfolderBase]: 30/80 cut-off events. [2023-08-04 07:36:36,223 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 07:36:36,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 80 events. 30/80 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 151 event pairs, 14 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 132. Up to 58 conditions per place. [2023-08-04 07:36:36,225 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 27 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 07:36:36,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 32 transitions, 148 flow [2023-08-04 07:36:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-04 07:36:36,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088566827697263 [2023-08-04 07:36:36,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-04 07:36:36,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-04 07:36:36,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:36,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-04 07:36:36,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 07:36:36,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:36,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:36:36,236 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 76 flow. Second operand 3 states and 316 transitions. [2023-08-04 07:36:36,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 32 transitions, 148 flow [2023-08-04 07:36:36,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:36,238 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 80 flow [2023-08-04 07:36:36,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-04 07:36:36,240 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-04 07:36:36,240 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 80 flow [2023-08-04 07:36:36,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 07:36:36,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:36,240 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] [2023-08-04 07:36:36,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:36:36,464 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 07:36:36,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:36,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash -118499115, now seen corresponding path program 1 times [2023-08-04 07:36:36,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:36,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051266907] [2023-08-04 07:36:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:36,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:36,545 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 07:36:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:36,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051266907] [2023-08-04 07:36:36,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051266907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:36,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404780843] [2023-08-04 07:36:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:36,550 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 07:36:36,577 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 07:36:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:36,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:36:36,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:36,638 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 07:36:36,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:36,653 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 07:36:36,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404780843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:36,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:36,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:36:36,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941319038] [2023-08-04 07:36:36,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:36,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:36:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:36:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:36,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 207 [2023-08-04 07:36:36,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 07:36:36,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:36,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 207 [2023-08-04 07:36:36,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:36,681 INFO L124 PetriNetUnfolderBase]: 4/15 cut-off events. [2023-08-04 07:36:36,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:36:36,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 15 events. 4/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 34. Up to 10 conditions per place. [2023-08-04 07:36:36,682 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 07:36:36,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 40 flow [2023-08-04 07:36:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:36:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:36:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2023-08-04 07:36:36,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46618357487922707 [2023-08-04 07:36:36,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2023-08-04 07:36:36,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2023-08-04 07:36:36,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:36,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2023-08-04 07:36:36,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 07:36:36,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 07:36:36,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 07:36:36,687 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 80 flow. Second operand 4 states and 386 transitions. [2023-08-04 07:36:36,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 40 flow [2023-08-04 07:36:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:36,688 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 07:36:36,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 07:36:36,688 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -16 predicate places. [2023-08-04 07:36:36,688 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 07:36:36,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 07:36:36,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:36:36,699 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 07:36:36,896 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 07:36:36,897 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:36:36,898 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:36:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 112 transitions, 246 flow [2023-08-04 07:36:36,913 INFO L124 PetriNetUnfolderBase]: 27/242 cut-off events. [2023-08-04 07:36:36,913 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:36:36,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 242 events. 27/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 865 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2023-08-04 07:36:36,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 112 transitions, 246 flow [2023-08-04 07:36:36,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 236 flow [2023-08-04 07:36:36,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:36:36,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 110 transitions, 236 flow [2023-08-04 07:36:36,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 110 transitions, 236 flow [2023-08-04 07:36:36,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 236 flow [2023-08-04 07:36:36,926 INFO L124 PetriNetUnfolderBase]: 25/236 cut-off events. [2023-08-04 07:36:36,926 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:36:36,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 236 events. 25/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 841 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2023-08-04 07:36:36,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 2256 [2023-08-04 07:36:39,133 INFO L134 LiptonReduction]: Checked pairs total: 4168 [2023-08-04 07:36:39,133 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 07:36:39,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:36:39,135 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;@3aaafb8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:36:39,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:36:39,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:36:39,138 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2023-08-04 07:36:39,138 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:36:39,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:39,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:36:39,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:36:39,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1735738669, now seen corresponding path program 1 times [2023-08-04 07:36:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080403439] [2023-08-04 07:36:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:36:39,154 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:36:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:36:39,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:36:39,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:36:39,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:36:39,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:36:39,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:36:39,177 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:36:39,178 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:36:39,178 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:36:39,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:36:39,201 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:36:39,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 142 transitions, 332 flow [2023-08-04 07:36:39,259 INFO L124 PetriNetUnfolderBase]: 106/812 cut-off events. [2023-08-04 07:36:39,259 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 07:36:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 812 events. 106/812 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4320 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 487. Up to 32 conditions per place. [2023-08-04 07:36:39,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 142 transitions, 332 flow [2023-08-04 07:36:39,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 139 transitions, 316 flow [2023-08-04 07:36:39,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:36:39,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 139 transitions, 316 flow [2023-08-04 07:36:39,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 139 transitions, 316 flow [2023-08-04 07:36:39,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 139 transitions, 316 flow [2023-08-04 07:36:39,316 INFO L124 PetriNetUnfolderBase]: 106/811 cut-off events. [2023-08-04 07:36:39,316 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 07:36:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 811 events. 106/811 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4324 event pairs, 0 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 484. Up to 32 conditions per place. [2023-08-04 07:36:39,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 6144 [2023-08-04 07:36:41,477 INFO L134 LiptonReduction]: Checked pairs total: 14261 [2023-08-04 07:36:41,477 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-04 07:36:41,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:36:41,481 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;@3aaafb8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:36:41,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:36:41,482 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:36:41,482 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 07:36:41,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:36:41,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:41,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:36:41,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:41,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 768430036, now seen corresponding path program 1 times [2023-08-04 07:36:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:41,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115195847] [2023-08-04 07:36:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:41,507 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 07:36:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115195847] [2023-08-04 07:36:41,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115195847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:41,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:36:41,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:36:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54202174] [2023-08-04 07:36:41,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:36:41,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-04 07:36:41,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 07:36:41,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:41,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-04 07:36:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:42,353 INFO L124 PetriNetUnfolderBase]: 11130/16047 cut-off events. [2023-08-04 07:36:42,353 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2023-08-04 07:36:42,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31639 conditions, 16047 events. 11130/16047 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 87812 event pairs, 6030 based on Foata normal form. 1480/13358 useless extension candidates. Maximal degree in co-relation 10987. Up to 14851 conditions per place. [2023-08-04 07:36:42,401 INFO L140 encePairwiseOnDemand]: 249/255 looper letters, 39 selfloop transitions, 2 changer transitions 4/51 dead transitions. [2023-08-04 07:36:42,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 228 flow [2023-08-04 07:36:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-04 07:36:42,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2023-08-04 07:36:42,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-04 07:36:42,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-04 07:36:42,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:42,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-04 07:36:42,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 07:36:42,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:42,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:42,405 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 138 flow. Second operand 3 states and 402 transitions. [2023-08-04 07:36:42,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 228 flow [2023-08-04 07:36:42,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:42,407 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 129 flow [2023-08-04 07:36:42,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-04 07:36:42,408 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 07:36:42,408 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 129 flow [2023-08-04 07:36:42,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 07:36:42,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:42,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:42,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:36:42,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:42,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2028159303, now seen corresponding path program 1 times [2023-08-04 07:36:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:42,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578562122] [2023-08-04 07:36:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:42,432 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 07:36:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578562122] [2023-08-04 07:36:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578562122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876428345] [2023-08-04 07:36:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:42,434 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 07:36:42,436 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 07:36:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:42,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:42,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:42,492 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 07:36:42,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876428345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:42,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:42,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469396926] [2023-08-04 07:36:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:42,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-04 07:36:42,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 07:36:42,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:42,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-04 07:36:42,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:42,792 INFO L124 PetriNetUnfolderBase]: 2752/4231 cut-off events. [2023-08-04 07:36:42,792 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-08-04 07:36:42,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8376 conditions, 4231 events. 2752/4231 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 20858 event pairs, 1784 based on Foata normal form. 0/3035 useless extension candidates. Maximal degree in co-relation 8342. Up to 3812 conditions per place. [2023-08-04 07:36:42,814 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 44 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 07:36:42,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 242 flow [2023-08-04 07:36:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-04 07:36:42,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2023-08-04 07:36:42,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-04 07:36:42,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-04 07:36:42,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:42,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-04 07:36:42,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 07:36:42,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:42,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:42,819 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 129 flow. Second operand 3 states and 400 transitions. [2023-08-04 07:36:42,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 242 flow [2023-08-04 07:36:42,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:42,823 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 137 flow [2023-08-04 07:36:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 07:36:42,824 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-04 07:36:42,824 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 137 flow [2023-08-04 07:36:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 07:36:42,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:42,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:42,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:36:43,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:43,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:43,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash -383882959, now seen corresponding path program 1 times [2023-08-04 07:36:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244933168] [2023-08-04 07:36:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:43,069 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 07:36:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244933168] [2023-08-04 07:36:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244933168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404408421] [2023-08-04 07:36:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:43,073 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 07:36:43,109 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 07:36:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:43,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:43,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:43,182 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 07:36:43,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404408421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:43,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549648823] [2023-08-04 07:36:43,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:43,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:43,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-04 07:36:43,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 07:36:43,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:43,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-04 07:36:43,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:43,537 INFO L124 PetriNetUnfolderBase]: 2745/4189 cut-off events. [2023-08-04 07:36:43,537 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-04 07:36:43,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 4189 events. 2745/4189 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20162 event pairs, 1151 based on Foata normal form. 0/3011 useless extension candidates. Maximal degree in co-relation 4638. Up to 3788 conditions per place. [2023-08-04 07:36:43,547 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 48 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 07:36:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 259 flow [2023-08-04 07:36:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 07:36:43,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526797385620915 [2023-08-04 07:36:43,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 07:36:43,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 07:36:43,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:43,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 07:36:43,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:36:43,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:43,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:43,550 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 137 flow. Second operand 3 states and 403 transitions. [2023-08-04 07:36:43,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 259 flow [2023-08-04 07:36:43,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:43,552 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 147 flow [2023-08-04 07:36:43,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-04 07:36:43,552 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 07:36:43,552 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 147 flow [2023-08-04 07:36:43,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 07:36:43,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:43,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:43,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:43,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:43,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 466393125, now seen corresponding path program 1 times [2023-08-04 07:36:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189505115] [2023-08-04 07:36:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:43,802 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 07:36:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189505115] [2023-08-04 07:36:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189505115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687661745] [2023-08-04 07:36:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:43,803 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 07:36:43,833 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 07:36:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:43,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:43,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:43,875 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 07:36:43,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:43,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687661745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:43,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:43,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:36:43,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966060199] [2023-08-04 07:36:43,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:43,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:43,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:43,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-04 07:36:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 07:36:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:43,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-04 07:36:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:44,105 INFO L124 PetriNetUnfolderBase]: 2616/4002 cut-off events. [2023-08-04 07:36:44,106 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-04 07:36:44,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8354 conditions, 4002 events. 2616/4002 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19143 event pairs, 1101 based on Foata normal form. 0/3099 useless extension candidates. Maximal degree in co-relation 4826. Up to 2427 conditions per place. [2023-08-04 07:36:44,119 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 58 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 07:36:44,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 317 flow [2023-08-04 07:36:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-04 07:36:44,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538562091503268 [2023-08-04 07:36:44,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-04 07:36:44,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-04 07:36:44,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:44,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-04 07:36:44,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:36:44,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:44,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 07:36:44,123 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 147 flow. Second operand 3 states and 412 transitions. [2023-08-04 07:36:44,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 317 flow [2023-08-04 07:36:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:44,127 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 157 flow [2023-08-04 07:36:44,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-04 07:36:44,127 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 07:36:44,127 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 157 flow [2023-08-04 07:36:44,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 07:36:44,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:44,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:44,134 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 07:36:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:44,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:44,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1330565107, now seen corresponding path program 1 times [2023-08-04 07:36:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466193357] [2023-08-04 07:36:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:44,379 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 07:36:44,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466193357] [2023-08-04 07:36:44,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466193357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262723816] [2023-08-04 07:36:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:44,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:44,381 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 07:36:44,383 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 07:36:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:44,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:36:44,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:44,485 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 07:36:44,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:44,502 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 07:36:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262723816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:44,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:44,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:36:44,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944394441] [2023-08-04 07:36:44,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:44,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:36:44,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:36:44,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:44,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 255 [2023-08-04 07:36:44,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 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 07:36:44,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:44,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 255 [2023-08-04 07:36:44,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:44,800 INFO L124 PetriNetUnfolderBase]: 2611/4034 cut-off events. [2023-08-04 07:36:44,801 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-08-04 07:36:44,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8731 conditions, 4034 events. 2611/4034 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19599 event pairs, 1132 based on Foata normal form. 3/3202 useless extension candidates. Maximal degree in co-relation 3769. Up to 3683 conditions per place. [2023-08-04 07:36:44,813 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 45 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 07:36:44,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 271 flow [2023-08-04 07:36:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:36:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:36:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-04 07:36:44,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2023-08-04 07:36:44,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-04 07:36:44,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-04 07:36:44,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:44,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-04 07:36:44,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 07:36:44,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:44,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:44,817 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 157 flow. Second operand 4 states and 515 transitions. [2023-08-04 07:36:44,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 271 flow [2023-08-04 07:36:44,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:44,822 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2023-08-04 07:36:44,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-04 07:36:44,823 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-08-04 07:36:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2023-08-04 07:36:44,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 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 07:36:44,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:44,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:44,829 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 07:36:45,027 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,SelfDestructingSolverStorable10 [2023-08-04 07:36:45,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:45,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1662464857, now seen corresponding path program 1 times [2023-08-04 07:36:45,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:45,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129181285] [2023-08-04 07:36:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:36:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129181285] [2023-08-04 07:36:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129181285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489649471] [2023-08-04 07:36:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:45,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:45,069 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 07:36:45,071 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 07:36:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:45,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:36:45,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:36:45,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:36:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489649471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:45,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:45,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:36:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272419379] [2023-08-04 07:36:45,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:36:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:36:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:45,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 255 [2023-08-04 07:36:45,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 07:36:45,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:45,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 255 [2023-08-04 07:36:45,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:45,249 INFO L124 PetriNetUnfolderBase]: 311/567 cut-off events. [2023-08-04 07:36:45,249 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-08-04 07:36:45,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 567 events. 311/567 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1865 event pairs, 167 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 1015. Up to 444 conditions per place. [2023-08-04 07:36:45,251 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 47 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 07:36:45,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 291 flow [2023-08-04 07:36:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:36:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:36:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-08-04 07:36:45,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068627450980392 [2023-08-04 07:36:45,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-08-04 07:36:45,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-08-04 07:36:45,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:45,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-08-04 07:36:45,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:45,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:45,255 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:45,255 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 4 states and 517 transitions. [2023-08-04 07:36:45,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 291 flow [2023-08-04 07:36:45,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 282 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:36:45,257 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 166 flow [2023-08-04 07:36:45,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-04 07:36:45,257 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-08-04 07:36:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 166 flow [2023-08-04 07:36:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 07:36:45,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:45,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:45,264 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 07:36:45,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:45,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:45,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:45,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1748011025, now seen corresponding path program 1 times [2023-08-04 07:36:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:45,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983620377] [2023-08-04 07:36:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:45,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:36:45,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:45,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983620377] [2023-08-04 07:36:45,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983620377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:45,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:36:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 07:36:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167943779] [2023-08-04 07:36:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:36:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:36:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:36:45,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-04 07:36:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 07:36:45,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-04 07:36:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:45,646 INFO L124 PetriNetUnfolderBase]: 510/954 cut-off events. [2023-08-04 07:36:45,646 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-08-04 07:36:45,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 954 events. 510/954 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4028 event pairs, 305 based on Foata normal form. 0/793 useless extension candidates. Maximal degree in co-relation 1193. Up to 449 conditions per place. [2023-08-04 07:36:45,649 INFO L140 encePairwiseOnDemand]: 250/255 looper letters, 73 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 07:36:45,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 82 transitions, 475 flow [2023-08-04 07:36:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:36:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:36:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-04 07:36:45,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205882352941177 [2023-08-04 07:36:45,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-04 07:36:45,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-04 07:36:45,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:45,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-04 07:36:45,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 07:36:45,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:45,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:45,654 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 166 flow. Second operand 4 states and 531 transitions. [2023-08-04 07:36:45,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 82 transitions, 475 flow [2023-08-04 07:36:45,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 82 transitions, 460 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:45,656 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 176 flow [2023-08-04 07:36:45,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-08-04 07:36:45,657 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-08-04 07:36:45,657 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 176 flow [2023-08-04 07:36:45,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 07:36:45,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:45,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:45,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:36:45,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:45,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1824432213, now seen corresponding path program 2 times [2023-08-04 07:36:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:45,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764037122] [2023-08-04 07:36:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:45,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:36:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764037122] [2023-08-04 07:36:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764037122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055203989] [2023-08-04 07:36:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:36:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:45,698 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 07:36:45,700 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 07:36:45,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:36:45,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:36:45,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:36:45,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:36:45,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:36:45,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055203989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:45,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:45,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 07:36:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911197323] [2023-08-04 07:36:45,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:45,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 07:36:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 07:36:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:36:45,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 255 [2023-08-04 07:36:45,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 07:36:45,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:45,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 255 [2023-08-04 07:36:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:46,018 INFO L124 PetriNetUnfolderBase]: 439/833 cut-off events. [2023-08-04 07:36:46,018 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2023-08-04 07:36:46,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 833 events. 439/833 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3422 event pairs, 35 based on Foata normal form. 59/789 useless extension candidates. Maximal degree in co-relation 1166. Up to 265 conditions per place. [2023-08-04 07:36:46,020 INFO L140 encePairwiseOnDemand]: 246/255 looper letters, 97 selfloop transitions, 10 changer transitions 2/115 dead transitions. [2023-08-04 07:36:46,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 628 flow [2023-08-04 07:36:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:36:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:36:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 988 transitions. [2023-08-04 07:36:46,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843137254901961 [2023-08-04 07:36:46,023 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 988 transitions. [2023-08-04 07:36:46,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 988 transitions. [2023-08-04 07:36:46,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:46,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 988 transitions. [2023-08-04 07:36:46,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 07:36:46,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 07:36:46,027 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 07:36:46,027 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 176 flow. Second operand 8 states and 988 transitions. [2023-08-04 07:36:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 628 flow [2023-08-04 07:36:46,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 618 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:46,029 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 227 flow [2023-08-04 07:36:46,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-04 07:36:46,030 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-08-04 07:36:46,030 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 227 flow [2023-08-04 07:36:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 07:36:46,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:46,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:46,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:46,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:36:46,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:46,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1964567579, now seen corresponding path program 1 times [2023-08-04 07:36:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337987396] [2023-08-04 07:36:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:46,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:36:46,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:46,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337987396] [2023-08-04 07:36:46,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337987396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:46,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100174920] [2023-08-04 07:36:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:46,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:46,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:36:46,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:36:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:46,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:36:46,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:36:46,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:36:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100174920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:46,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:36:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211639472] [2023-08-04 07:36:46,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:36:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:36:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:46,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 255 [2023-08-04 07:36:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 07:36:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 255 [2023-08-04 07:36:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:46,483 INFO L124 PetriNetUnfolderBase]: 359/714 cut-off events. [2023-08-04 07:36:46,483 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-08-04 07:36:46,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 714 events. 359/714 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2812 event pairs, 143 based on Foata normal form. 16/646 useless extension candidates. Maximal degree in co-relation 1133. Up to 357 conditions per place. [2023-08-04 07:36:46,485 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 58 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 07:36:46,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 396 flow [2023-08-04 07:36:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:36:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:36:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2023-08-04 07:36:46,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127450980392156 [2023-08-04 07:36:46,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2023-08-04 07:36:46,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2023-08-04 07:36:46,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:46,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2023-08-04 07:36:46,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 07:36:46,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:46,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 07:36:46,490 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 227 flow. Second operand 4 states and 523 transitions. [2023-08-04 07:36:46,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 396 flow [2023-08-04 07:36:46,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 382 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:36:46,492 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 228 flow [2023-08-04 07:36:46,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 07:36:46,492 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-04 07:36:46,492 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 228 flow [2023-08-04 07:36:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 07:36:46,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:46,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:46,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:46,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 07:36:46,697 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:46,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash -991681343, now seen corresponding path program 1 times [2023-08-04 07:36:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331579530] [2023-08-04 07:36:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:36:46,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331579530] [2023-08-04 07:36:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331579530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969389181] [2023-08-04 07:36:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:46,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:46,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:36:47,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 07:36:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:47,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 07:36:47,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:47,127 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:36:47,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:36:47,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:47,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:47,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:47,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:36:47,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:36:47,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969389181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:47,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-04 07:36:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579040571] [2023-08-04 07:36:47,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:36:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:36:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:36:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 255 [2023-08-04 07:36:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 228 flow. Second operand has 15 states, 15 states have (on average 109.26666666666667) internal successors, (1639), 15 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states 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 07:36:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 255 [2023-08-04 07:36:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:49,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 07:36:52,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 07:36:52,443 INFO L124 PetriNetUnfolderBase]: 1451/2432 cut-off events. [2023-08-04 07:36:52,444 INFO L125 PetriNetUnfolderBase]: For 3028/3028 co-relation queries the response was YES. [2023-08-04 07:36:52,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6398 conditions, 2432 events. 1451/2432 cut-off events. For 3028/3028 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12276 event pairs, 213 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 6065. Up to 611 conditions per place. [2023-08-04 07:36:52,455 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 206 selfloop transitions, 62 changer transitions 0/273 dead transitions. [2023-08-04 07:36:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 273 transitions, 1826 flow [2023-08-04 07:36:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-04 07:36:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-04 07:36:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2617 transitions. [2023-08-04 07:36:52,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44620630861040067 [2023-08-04 07:36:52,461 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2617 transitions. [2023-08-04 07:36:52,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2617 transitions. [2023-08-04 07:36:52,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:52,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2617 transitions. [2023-08-04 07:36:52,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 113.78260869565217) internal successors, (2617), 23 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 07:36:52,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 255.0) internal successors, (6120), 24 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states 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 07:36:52,472 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 255.0) internal successors, (6120), 24 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states 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 07:36:52,472 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 228 flow. Second operand 23 states and 2617 transitions. [2023-08-04 07:36:52,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 273 transitions, 1826 flow [2023-08-04 07:36:52,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 273 transitions, 1775 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 07:36:52,479 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 592 flow [2023-08-04 07:36:52,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=592, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2023-08-04 07:36:52,479 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 53 predicate places. [2023-08-04 07:36:52,479 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 592 flow [2023-08-04 07:36:52,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 109.26666666666667) internal successors, (1639), 15 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states 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 07:36:52,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:52,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 07:36:52,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:52,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 988071559, now seen corresponding path program 2 times [2023-08-04 07:36:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615390691] [2023-08-04 07:36:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 07:36:52,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:52,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615390691] [2023-08-04 07:36:52,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615390691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:52,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636053778] [2023-08-04 07:36:52,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:36:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:52,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:52,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:36:52,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 07:36:53,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:36:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:36:53,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-04 07:36:53,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:53,098 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:36:53,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:36:53,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:53,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:53,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:53,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:36:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:36:53,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:36:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636053778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:53,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:53,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-04 07:36:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280517635] [2023-08-04 07:36:53,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:36:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:36:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:36:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 255 [2023-08-04 07:36:53,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 592 flow. Second operand has 15 states, 15 states have (on average 111.06666666666666) internal successors, (1666), 15 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states 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 07:36:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 255 [2023-08-04 07:36:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:56,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 07:36:56,464 INFO L124 PetriNetUnfolderBase]: 3065/4794 cut-off events. [2023-08-04 07:36:56,464 INFO L125 PetriNetUnfolderBase]: For 19996/20050 co-relation queries the response was YES. [2023-08-04 07:36:56,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19136 conditions, 4794 events. 3065/4794 cut-off events. For 19996/20050 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25400 event pairs, 239 based on Foata normal form. 228/4908 useless extension candidates. Maximal degree in co-relation 18592. Up to 1007 conditions per place. [2023-08-04 07:36:56,496 INFO L140 encePairwiseOnDemand]: 248/255 looper letters, 217 selfloop transitions, 145 changer transitions 0/378 dead transitions. [2023-08-04 07:36:56,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 378 transitions, 2863 flow [2023-08-04 07:36:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 07:36:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 07:36:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2165 transitions. [2023-08-04 07:36:56,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44685242518059853 [2023-08-04 07:36:56,500 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2165 transitions. [2023-08-04 07:36:56,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2165 transitions. [2023-08-04 07:36:56,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:56,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2165 transitions. [2023-08-04 07:36:56,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.94736842105263) internal successors, (2165), 19 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states 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 07:36:56,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 255.0) internal successors, (5100), 20 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states 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 07:36:56,510 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 255.0) internal successors, (5100), 20 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states 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 07:36:56,511 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 592 flow. Second operand 19 states and 2165 transitions. [2023-08-04 07:36:56,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 378 transitions, 2863 flow [2023-08-04 07:36:56,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 378 transitions, 2863 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:36:56,546 INFO L231 Difference]: Finished difference. Result has 119 places, 221 transitions, 1553 flow [2023-08-04 07:36:56,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1553, PETRI_PLACES=119, PETRI_TRANSITIONS=221} [2023-08-04 07:36:56,547 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 73 predicate places. [2023-08-04 07:36:56,547 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 221 transitions, 1553 flow [2023-08-04 07:36:56,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 111.06666666666666) internal successors, (1666), 15 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states 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 07:36:56,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:56,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:56,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:56,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 07:36:56,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:56,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1551230167, now seen corresponding path program 1 times [2023-08-04 07:36:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866957984] [2023-08-04 07:36:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:36:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866957984] [2023-08-04 07:36:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866957984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549264953] [2023-08-04 07:36:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:57,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:57,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:57,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:36:57,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 07:36:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:57,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-04 07:36:57,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:57,416 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:36:57,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-08-04 07:36:57,453 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:36:57,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 07:36:57,510 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:36:57,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-08-04 07:36:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:36:57,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:36:57,629 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:36:57,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 209 [2023-08-04 07:36:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:36:57,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549264953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:36:57,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:36:57,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-04 07:36:57,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214010281] [2023-08-04 07:36:57,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:36:57,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 07:36:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 07:36:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2023-08-04 07:36:59,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 255 [2023-08-04 07:36:59,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 221 transitions, 1553 flow. Second operand has 24 states, 24 states have (on average 94.04166666666667) internal successors, (2257), 24 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states 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 07:36:59,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:59,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 255 [2023-08-04 07:36:59,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:06,550 INFO L124 PetriNetUnfolderBase]: 7018/10583 cut-off events. [2023-08-04 07:37:06,550 INFO L125 PetriNetUnfolderBase]: For 48483/48483 co-relation queries the response was YES. [2023-08-04 07:37:06,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48686 conditions, 10583 events. 7018/10583 cut-off events. For 48483/48483 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 61502 event pairs, 515 based on Foata normal form. 250/10832 useless extension candidates. Maximal degree in co-relation 47145. Up to 1581 conditions per place. [2023-08-04 07:37:06,690 INFO L140 encePairwiseOnDemand]: 242/255 looper letters, 690 selfloop transitions, 752 changer transitions 0/1446 dead transitions. [2023-08-04 07:37:06,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1446 transitions, 13175 flow [2023-08-04 07:37:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-04 07:37:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-04 07:37:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9518 transitions. [2023-08-04 07:37:06,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847988680008086 [2023-08-04 07:37:06,710 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9518 transitions. [2023-08-04 07:37:06,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9518 transitions. [2023-08-04 07:37:06,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:06,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9518 transitions. [2023-08-04 07:37:06,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 98.12371134020619) internal successors, (9518), 97 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states 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 07:37:06,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 255.0) internal successors, (24990), 98 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 07:37:06,766 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 255.0) internal successors, (24990), 98 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 07:37:06,766 INFO L175 Difference]: Start difference. First operand has 119 places, 221 transitions, 1553 flow. Second operand 97 states and 9518 transitions. [2023-08-04 07:37:06,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1446 transitions, 13175 flow [2023-08-04 07:37:06,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1446 transitions, 12409 flow, removed 383 selfloop flow, removed 0 redundant places. [2023-08-04 07:37:06,962 INFO L231 Difference]: Finished difference. Result has 266 places, 921 transitions, 9115 flow [2023-08-04 07:37:06,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=9115, PETRI_PLACES=266, PETRI_TRANSITIONS=921} [2023-08-04 07:37:06,963 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 220 predicate places. [2023-08-04 07:37:06,963 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 921 transitions, 9115 flow [2023-08-04 07:37:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.04166666666667) internal successors, (2257), 24 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states 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 07:37:06,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:06,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:06,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 07:37:07,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:07,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:07,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash -111530525, now seen corresponding path program 2 times [2023-08-04 07:37:07,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:07,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224906726] [2023-08-04 07:37:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:37:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224906726] [2023-08-04 07:37:07,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224906726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:07,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560010580] [2023-08-04 07:37:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:37:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:07,645 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:07,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 07:37:07,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:37:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:37:07,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-04 07:37:07,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:07,887 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:37:07,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-08-04 07:37:07,921 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:07,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 07:37:07,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-08-04 07:37:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:37:07,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:08,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:37:08,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 209 [2023-08-04 07:37:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:37:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560010580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:08,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-04 07:37:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199201525] [2023-08-04 07:37:08,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 07:37:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 07:37:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2023-08-04 07:37:10,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 255 [2023-08-04 07:37:10,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 921 transitions, 9115 flow. Second operand has 24 states, 24 states have (on average 95.375) internal successors, (2289), 24 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states 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 07:37:10,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:10,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 255 [2023-08-04 07:37:10,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:18,828 INFO L124 PetriNetUnfolderBase]: 10821/16155 cut-off events. [2023-08-04 07:37:18,828 INFO L125 PetriNetUnfolderBase]: For 157889/157889 co-relation queries the response was YES. [2023-08-04 07:37:18,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101585 conditions, 16155 events. 10821/16155 cut-off events. For 157889/157889 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 99536 event pairs, 832 based on Foata normal form. 224/16377 useless extension candidates. Maximal degree in co-relation 100925. Up to 2473 conditions per place. [2023-08-04 07:37:18,957 INFO L140 encePairwiseOnDemand]: 242/255 looper letters, 882 selfloop transitions, 1229 changer transitions 0/2115 dead transitions. [2023-08-04 07:37:18,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 2115 transitions, 24999 flow [2023-08-04 07:37:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-04 07:37:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-04 07:37:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9605 transitions. [2023-08-04 07:37:18,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38831615120274915 [2023-08-04 07:37:18,965 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9605 transitions. [2023-08-04 07:37:18,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9605 transitions. [2023-08-04 07:37:18,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:18,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9605 transitions. [2023-08-04 07:37:18,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 99.02061855670104) internal successors, (9605), 97 states have internal predecessors, (9605), 0 states have call successors, (0), 0 states 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 07:37:18,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 255.0) internal successors, (24990), 98 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 07:37:18,995 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 255.0) internal successors, (24990), 98 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 07:37:18,995 INFO L175 Difference]: Start difference. First operand has 266 places, 921 transitions, 9115 flow. Second operand 97 states and 9605 transitions. [2023-08-04 07:37:18,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 2115 transitions, 24999 flow [2023-08-04 07:37:21,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 2115 transitions, 24233 flow, removed 352 selfloop flow, removed 5 redundant places. [2023-08-04 07:37:21,054 INFO L231 Difference]: Finished difference. Result has 393 places, 1552 transitions, 19446 flow [2023-08-04 07:37:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=8490, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=19446, PETRI_PLACES=393, PETRI_TRANSITIONS=1552} [2023-08-04 07:37:21,055 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 347 predicate places. [2023-08-04 07:37:21,055 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1552 transitions, 19446 flow [2023-08-04 07:37:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.375) internal successors, (2289), 24 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states 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 07:37:21,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:21,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:21,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:21,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:21,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1107148744, now seen corresponding path program 1 times [2023-08-04 07:37:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440972519] [2023-08-04 07:37:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:37:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440972519] [2023-08-04 07:37:21,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440972519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:21,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143351457] [2023-08-04 07:37:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:21,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:21,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:21,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 07:37:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:22,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-04 07:37:22,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:22,043 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:37:22,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:37:22,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:22,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:22,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:22,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:22,365 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:37:22,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:37:22,554 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:37:22,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:37:22,643 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:22,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:37:22,745 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:22,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:37:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:37:22,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:37:23,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143351457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:23,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:23,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 33 [2023-08-04 07:37:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666397678] [2023-08-04 07:37:23,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 07:37:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 07:37:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2023-08-04 07:37:28,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 255 [2023-08-04 07:37:28,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1552 transitions, 19446 flow. Second operand has 34 states, 34 states have (on average 95.61764705882354) internal successors, (3251), 34 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states 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 07:37:28,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:28,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 255 [2023-08-04 07:37:28,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:38:21,349 INFO L124 PetriNetUnfolderBase]: 14429/21748 cut-off events. [2023-08-04 07:38:21,349 INFO L125 PetriNetUnfolderBase]: For 501599/501599 co-relation queries the response was YES. [2023-08-04 07:38:21,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169231 conditions, 21748 events. 14429/21748 cut-off events. For 501599/501599 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 143060 event pairs, 1461 based on Foata normal form. 67/21806 useless extension candidates. Maximal degree in co-relation 168395. Up to 14706 conditions per place. [2023-08-04 07:38:21,637 INFO L140 encePairwiseOnDemand]: 241/255 looper letters, 1947 selfloop transitions, 713 changer transitions 24/2688 dead transitions. [2023-08-04 07:38:21,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2688 transitions, 37398 flow [2023-08-04 07:38:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-04 07:38:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-04 07:38:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 8626 transitions. [2023-08-04 07:38:21,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933424532603739 [2023-08-04 07:38:21,644 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 8626 transitions. [2023-08-04 07:38:21,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 8626 transitions. [2023-08-04 07:38:21,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:38:21,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 8626 transitions. [2023-08-04 07:38:21,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 100.30232558139535) internal successors, (8626), 86 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states 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 07:38:21,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 255.0) internal successors, (22185), 87 states have internal predecessors, (22185), 0 states have call successors, (0), 0 states 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 07:38:21,664 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 255.0) internal successors, (22185), 87 states have internal predecessors, (22185), 0 states have call successors, (0), 0 states 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 07:38:21,664 INFO L175 Difference]: Start difference. First operand has 393 places, 1552 transitions, 19446 flow. Second operand 86 states and 8626 transitions. [2023-08-04 07:38:21,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2688 transitions, 37398 flow [2023-08-04 07:38:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 2688 transitions, 34746 flow, removed 898 selfloop flow, removed 30 redundant places. [2023-08-04 07:38:32,592 INFO L231 Difference]: Finished difference. Result has 487 places, 2063 transitions, 26814 flow [2023-08-04 07:38:32,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=17350, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=26814, PETRI_PLACES=487, PETRI_TRANSITIONS=2063} [2023-08-04 07:38:32,593 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 441 predicate places. [2023-08-04 07:38:32,593 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 2063 transitions, 26814 flow [2023-08-04 07:38:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.61764705882354) internal successors, (3251), 34 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states 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 07:38:32,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:38:32,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:38:32,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 07:38:32,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:38:32,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:38:32,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:38:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash -851477888, now seen corresponding path program 2 times [2023-08-04 07:38:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:38:32,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205721240] [2023-08-04 07:38:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:38:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:38:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:38:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:38:33,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:38:33,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205721240] [2023-08-04 07:38:33,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205721240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:38:33,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131270134] [2023-08-04 07:38:33,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:38:33,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:38:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:38:33,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:38:33,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 07:38:33,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:38:33,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:38:33,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-04 07:38:33,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:38:33,423 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:38:33,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:38:33,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:33,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:33,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:33,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:33,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 07:38:33,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:38:33,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:38:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:38:33,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:38:34,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 186 [2023-08-04 07:38:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:38:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131270134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:38:34,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:38:34,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 30 [2023-08-04 07:38:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17231386] [2023-08-04 07:38:34,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:38:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-04 07:38:34,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:38:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-04 07:38:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2023-08-04 07:38:37,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 255 [2023-08-04 07:38:37,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 2063 transitions, 26814 flow. Second operand has 31 states, 31 states have (on average 96.74193548387096) internal successors, (2999), 31 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states 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 07:38:37,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:38:37,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 255 [2023-08-04 07:38:37,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:38:54,941 INFO L124 PetriNetUnfolderBase]: 20777/31507 cut-off events. [2023-08-04 07:38:54,941 INFO L125 PetriNetUnfolderBase]: For 771852/771852 co-relation queries the response was YES. [2023-08-04 07:38:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248432 conditions, 31507 events. 20777/31507 cut-off events. For 771852/771852 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 222603 event pairs, 2328 based on Foata normal form. 220/31695 useless extension candidates. Maximal degree in co-relation 248219. Up to 21606 conditions per place. [2023-08-04 07:38:55,412 INFO L140 encePairwiseOnDemand]: 241/255 looper letters, 2677 selfloop transitions, 1042 changer transitions 19/3742 dead transitions. [2023-08-04 07:38:55,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 3742 transitions, 55499 flow [2023-08-04 07:38:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-04 07:38:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-04 07:38:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 9191 transitions. [2023-08-04 07:38:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396078431372549 [2023-08-04 07:38:55,546 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 9191 transitions. [2023-08-04 07:38:55,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 9191 transitions. [2023-08-04 07:38:55,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:38:55,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 9191 transitions. [2023-08-04 07:38:55,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 101.0) internal successors, (9191), 91 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states 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 07:38:55,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 255.0) internal successors, (23460), 92 states have internal predecessors, (23460), 0 states have call successors, (0), 0 states 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 07:38:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 255.0) internal successors, (23460), 92 states have internal predecessors, (23460), 0 states have call successors, (0), 0 states 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 07:38:55,585 INFO L175 Difference]: Start difference. First operand has 487 places, 2063 transitions, 26814 flow. Second operand 91 states and 9191 transitions. [2023-08-04 07:38:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 3742 transitions, 55499 flow [2023-08-04 07:39:21,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 3742 transitions, 54138 flow, removed 610 selfloop flow, removed 12 redundant places. [2023-08-04 07:39:21,190 INFO L231 Difference]: Finished difference. Result has 618 places, 2968 transitions, 43518 flow [2023-08-04 07:39:21,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=25953, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=43518, PETRI_PLACES=618, PETRI_TRANSITIONS=2968} [2023-08-04 07:39:21,192 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 572 predicate places. [2023-08-04 07:39:21,192 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 2968 transitions, 43518 flow [2023-08-04 07:39:21,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.74193548387096) internal successors, (2999), 31 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states 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 07:39:21,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:39:21,192 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:39:21,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 07:39:21,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:21,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:39:21,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:39:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 708793369, now seen corresponding path program 1 times [2023-08-04 07:39:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:39:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915815592] [2023-08-04 07:39:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:39:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:39:21,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:39:21,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915815592] [2023-08-04 07:39:21,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915815592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:39:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985398370] [2023-08-04 07:39:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:39:21,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:39:21,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 07:39:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:22,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-04 07:39:22,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:39:22,144 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 07:39:22,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-04 07:39:22,201 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 07:39:22,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2023-08-04 07:39:22,373 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 07:39:22,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 36 [2023-08-04 07:39:22,427 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 07:39:22,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 36 [2023-08-04 07:39:22,645 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:39:22,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2023-08-04 07:39:22,734 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:39:22,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2023-08-04 07:39:22,839 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:39:22,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2023-08-04 07:39:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:39:23,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:39:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:39:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985398370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:39:23,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:39:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 12] total 34 [2023-08-04 07:39:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117027362] [2023-08-04 07:39:23,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:39:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 07:39:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:39:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 07:39:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=990, Unknown=1, NotChecked=0, Total=1122 [2023-08-04 07:39:28,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 255 [2023-08-04 07:39:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 2968 transitions, 43518 flow. Second operand has 34 states, 34 states have (on average 70.67647058823529) internal successors, (2403), 34 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states 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 07:39:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:39:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 255 [2023-08-04 07:39:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:40:12,066 INFO L124 PetriNetUnfolderBase]: 27064/41314 cut-off events. [2023-08-04 07:40:12,066 INFO L125 PetriNetUnfolderBase]: For 1157129/1157129 co-relation queries the response was YES. [2023-08-04 07:40:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347050 conditions, 41314 events. 27064/41314 cut-off events. For 1157129/1157129 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 304616 event pairs, 1134 based on Foata normal form. 660/41951 useless extension candidates. Maximal degree in co-relation 346617. Up to 18983 conditions per place. [2023-08-04 07:40:13,133 INFO L140 encePairwiseOnDemand]: 241/255 looper letters, 2215 selfloop transitions, 2603 changer transitions 7/4829 dead transitions. [2023-08-04 07:40:13,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 4829 transitions, 77367 flow [2023-08-04 07:40:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-08-04 07:40:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2023-08-04 07:40:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 9771 transitions. [2023-08-04 07:40:13,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2925011225864392 [2023-08-04 07:40:13,141 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 9771 transitions. [2023-08-04 07:40:13,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 9771 transitions. [2023-08-04 07:40:13,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:40:13,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 9771 transitions. [2023-08-04 07:40:13,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 74.58778625954199) internal successors, (9771), 131 states have internal predecessors, (9771), 0 states have call successors, (0), 0 states 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 07:40:13,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 255.0) internal successors, (33660), 132 states have internal predecessors, (33660), 0 states have call successors, (0), 0 states 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 07:40:13,170 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 255.0) internal successors, (33660), 132 states have internal predecessors, (33660), 0 states have call successors, (0), 0 states 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 07:40:13,170 INFO L175 Difference]: Start difference. First operand has 618 places, 2968 transitions, 43518 flow. Second operand 131 states and 9771 transitions. [2023-08-04 07:40:13,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 4829 transitions, 77367 flow [2023-08-04 07:41:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 4829 transitions, 75175 flow, removed 1087 selfloop flow, removed 6 redundant places. [2023-08-04 07:41:04,076 INFO L231 Difference]: Finished difference. Result has 775 places, 4049 transitions, 67672 flow [2023-08-04 07:41:04,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=41357, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=67672, PETRI_PLACES=775, PETRI_TRANSITIONS=4049} [2023-08-04 07:41:04,078 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 729 predicate places. [2023-08-04 07:41:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 4049 transitions, 67672 flow [2023-08-04 07:41:04,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.67647058823529) internal successors, (2403), 34 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states 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 07:41:04,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:41:04,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:41:04,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 07:41:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:04,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:41:04,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:41:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1640019046, now seen corresponding path program 3 times [2023-08-04 07:41:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:41:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15455210] [2023-08-04 07:41:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:41:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:41:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:41:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15455210] [2023-08-04 07:41:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15455210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:41:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148716596] [2023-08-04 07:41:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:41:04,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:41:04,665 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:41:04,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 07:41:04,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 07:41:04,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:41:04,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-04 07:41:04,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:41:04,807 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:41:04,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:41:04,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:41:04,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:41:04,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:41:04,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:41:05,044 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:41:05,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:41:05,171 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:41:05,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:41:05,229 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:41:05,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:41:05,279 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:41:05,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:41:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:41:05,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:41:05,915 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_717 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_717))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) c_~v~0.offset (select (select .cse0 3) 0)))) 3) 0) 66)) is different from false [2023-08-04 07:41:05,935 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_717 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_717))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 07:41:05,943 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_717 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_717))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) 0 (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 07:41:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 14 not checked. [2023-08-04 07:41:06,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148716596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:41:06,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:41:06,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 33 [2023-08-04 07:41:06,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556793036] [2023-08-04 07:41:06,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:41:06,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 07:41:06,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:41:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 07:41:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=810, Unknown=3, NotChecked=180, Total=1122 [2023-08-04 07:41:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 255 [2023-08-04 07:41:06,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 4049 transitions, 67672 flow. Second operand has 34 states, 34 states have (on average 71.70588235294117) internal successors, (2438), 34 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 07:41:06,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:41:06,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 255 [2023-08-04 07:41:06,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:01,568 INFO L124 PetriNetUnfolderBase]: 30528/46633 cut-off events. [2023-08-04 07:42:01,569 INFO L125 PetriNetUnfolderBase]: For 1377713/1377713 co-relation queries the response was YES. [2023-08-04 07:42:03,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424425 conditions, 46633 events. 30528/46633 cut-off events. For 1377713/1377713 co-relation queries the response was YES. Maximal size of possible extension queue 2323. Compared 349782 event pairs, 3309 based on Foata normal form. 247/46866 useless extension candidates. Maximal degree in co-relation 423670. Up to 37842 conditions per place. [2023-08-04 07:42:03,547 INFO L140 encePairwiseOnDemand]: 235/255 looper letters, 4263 selfloop transitions, 825 changer transitions 21/5113 dead transitions. [2023-08-04 07:42:03,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 5113 transitions, 94592 flow [2023-08-04 07:42:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-04 07:42:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-04 07:42:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5005 transitions. [2023-08-04 07:42:03,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30196078431372547 [2023-08-04 07:42:03,552 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5005 transitions. [2023-08-04 07:42:03,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5005 transitions. [2023-08-04 07:42:03,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:03,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5005 transitions. [2023-08-04 07:42:03,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 77.0) internal successors, (5005), 65 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states 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 07:42:03,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 255.0) internal successors, (16830), 66 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states 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 07:42:03,567 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 255.0) internal successors, (16830), 66 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states 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 07:42:03,567 INFO L175 Difference]: Start difference. First operand has 775 places, 4049 transitions, 67672 flow. Second operand 65 states and 5005 transitions. [2023-08-04 07:42:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 5113 transitions, 94592 flow [2023-08-04 07:43:50,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 5113 transitions, 91112 flow, removed 1702 selfloop flow, removed 9 redundant places. [2023-08-04 07:43:50,116 INFO L231 Difference]: Finished difference. Result has 858 places, 4557 transitions, 77848 flow [2023-08-04 07:43:50,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=65009, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=77848, PETRI_PLACES=858, PETRI_TRANSITIONS=4557} [2023-08-04 07:43:50,119 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 812 predicate places. [2023-08-04 07:43:50,119 INFO L495 AbstractCegarLoop]: Abstraction has has 858 places, 4557 transitions, 77848 flow [2023-08-04 07:43:50,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 71.70588235294117) internal successors, (2438), 34 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 07:43:50,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:43:50,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:43:50,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 07:43:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:43:50,325 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:43:50,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:43:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1681683200, now seen corresponding path program 4 times [2023-08-04 07:43:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:43:50,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892006337] [2023-08-04 07:43:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:43:50,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:43:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:43:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:43:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:43:50,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892006337] [2023-08-04 07:43:50,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892006337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:43:50,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364616121] [2023-08-04 07:43:50,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 07:43:50,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:43:50,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:43:50,712 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:43:50,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 07:43:50,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 07:43:50,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:43:50,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 72 conjunts are in the unsatisfiable core [2023-08-04 07:43:50,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:43:50,857 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:43:50,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:43:50,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:50,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:51,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:51,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:51,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 07:43:51,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:43:51,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:43:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:43:51,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:43:51,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 186 [2023-08-04 07:43:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:43:51,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364616121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:43:51,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:43:51,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 13] total 38 [2023-08-04 07:43:51,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017453390] [2023-08-04 07:43:51,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:43:51,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-04 07:43:51,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:43:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-04 07:43:51,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2023-08-04 07:43:55,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 255 [2023-08-04 07:43:55,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 4557 transitions, 77848 flow. Second operand has 39 states, 39 states have (on average 88.28205128205128) internal successors, (3443), 39 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 07:43:55,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:43:55,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 255 [2023-08-04 07:43:55,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:44:42,033 INFO L124 PetriNetUnfolderBase]: 34417/52633 cut-off events. [2023-08-04 07:44:42,033 INFO L125 PetriNetUnfolderBase]: For 1236321/1236325 co-relation queries the response was YES. [2023-08-04 07:44:44,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470092 conditions, 52633 events. 34417/52633 cut-off events. For 1236321/1236325 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 402262 event pairs, 3326 based on Foata normal form. 324/52922 useless extension candidates. Maximal degree in co-relation 469587. Up to 36973 conditions per place. [2023-08-04 07:44:44,800 INFO L140 encePairwiseOnDemand]: 238/255 looper letters, 4330 selfloop transitions, 1443 changer transitions 22/5799 dead transitions. [2023-08-04 07:44:44,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 5799 transitions, 110299 flow [2023-08-04 07:44:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-04 07:44:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-04 07:44:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6885 transitions. [2023-08-04 07:44:44,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36486486486486486 [2023-08-04 07:44:44,817 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6885 transitions. [2023-08-04 07:44:44,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6885 transitions. [2023-08-04 07:44:44,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:44:44,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6885 transitions. [2023-08-04 07:44:44,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 93.04054054054055) internal successors, (6885), 74 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states 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 07:44:44,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 255.0) internal successors, (19125), 75 states have internal predecessors, (19125), 0 states have call successors, (0), 0 states 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 07:44:44,846 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 255.0) internal successors, (19125), 75 states have internal predecessors, (19125), 0 states have call successors, (0), 0 states 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 07:44:44,846 INFO L175 Difference]: Start difference. First operand has 858 places, 4557 transitions, 77848 flow. Second operand 74 states and 6885 transitions. [2023-08-04 07:44:44,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 5799 transitions, 110299 flow [2023-08-04 07:46:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 915 places, 5799 transitions, 107064 flow, removed 1522 selfloop flow, removed 15 redundant places. [2023-08-04 07:46:28,990 INFO L231 Difference]: Finished difference. Result has 945 places, 5123 transitions, 91912 flow [2023-08-04 07:46:28,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=74649, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=934, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=91912, PETRI_PLACES=945, PETRI_TRANSITIONS=5123} [2023-08-04 07:46:28,993 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 899 predicate places. [2023-08-04 07:46:28,993 INFO L495 AbstractCegarLoop]: Abstraction has has 945 places, 5123 transitions, 91912 flow [2023-08-04 07:46:28,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 88.28205128205128) internal successors, (3443), 39 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 07:46:28,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:46:28,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:46:29,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 07:46:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 07:46:29,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:46:29,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:46:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash 794516734, now seen corresponding path program 5 times [2023-08-04 07:46:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:46:29,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886584121] [2023-08-04 07:46:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:46:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:46:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:46:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:46:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:46:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886584121] [2023-08-04 07:46:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886584121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:46:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397861523] [2023-08-04 07:46:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-04 07:46:29,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:46:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:46:29,598 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:46:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 07:46:29,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-04 07:46:29,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:46:29,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-04 07:46:29,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:46:29,892 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:46:29,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:46:29,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:29,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:30,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:30,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:30,359 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:46:30,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:46:30,474 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:46:30,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:46:30,545 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:46:30,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:46:30,629 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:46:30,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:46:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:46:30,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:46:31,580 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~v~0.base_145 Int) (v_ArrVal_841 (Array Int Int))) (or (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_841))) (store .cse0 v_~v~0.base_145 (store (select .cse0 v_~v~0.base_145) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0)) (< |c_thread1Thread2of2ForFork0_#t~malloc3.base| v_~v~0.base_145))) is different from false [2023-08-04 07:46:31,588 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~v~0.base_145 Int) (v_ArrVal_841 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ v_~v~0.base_145 1)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_841))) (store .cse0 v_~v~0.base_145 (store (select .cse0 v_~v~0.base_145) 0 (select (select .cse0 3) 0)))) 3) 0)))) is different from false [2023-08-04 07:46:31,611 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~v~0.base_145 Int) (v_ArrVal_839 (Array Int Int)) (v_ArrVal_841 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ v_~v~0.base_145 1)) (= 66 (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_839) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_841))) (store .cse0 v_~v~0.base_145 (store (select .cse0 v_~v~0.base_145) 0 (select (select .cse0 3) 0)))) 3) 0)))) is different from false [2023-08-04 07:46:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 6 trivial. 5 not checked. [2023-08-04 07:46:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397861523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:46:31,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:46:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-08-04 07:46:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271917562] [2023-08-04 07:46:31,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:46:31,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-04 07:46:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:46:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-04 07:46:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1012, Unknown=4, NotChecked=198, Total=1332 [2023-08-04 07:46:31,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 255 [2023-08-04 07:46:31,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 945 places, 5123 transitions, 91912 flow. Second operand has 37 states, 37 states have (on average 70.48648648648648) internal successors, (2608), 37 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states 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 07:46:31,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:46:31,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 255 [2023-08-04 07:46:31,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:48:38,031 INFO L124 PetriNetUnfolderBase]: 39707/60815 cut-off events. [2023-08-04 07:48:38,032 INFO L125 PetriNetUnfolderBase]: For 1631587/1631595 co-relation queries the response was YES. [2023-08-04 07:48:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567628 conditions, 60815 events. 39707/60815 cut-off events. For 1631587/1631595 co-relation queries the response was YES. Maximal size of possible extension queue 3032. Compared 477375 event pairs, 2545 based on Foata normal form. 688/61499 useless extension candidates. Maximal degree in co-relation 567350. Up to 39991 conditions per place. [2023-08-04 07:48:41,273 INFO L140 encePairwiseOnDemand]: 236/255 looper letters, 4569 selfloop transitions, 2080 changer transitions 27/6680 dead transitions. [2023-08-04 07:48:41,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 6680 transitions, 132408 flow [2023-08-04 07:48:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-04 07:48:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-04 07:48:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6614 transitions. [2023-08-04 07:48:41,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2947415329768271 [2023-08-04 07:48:41,278 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6614 transitions. [2023-08-04 07:48:41,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6614 transitions. [2023-08-04 07:48:41,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:48:41,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6614 transitions. [2023-08-04 07:48:41,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 75.1590909090909) internal successors, (6614), 88 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states 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 07:48:41,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 255.0) internal successors, (22695), 89 states have internal predecessors, (22695), 0 states have call successors, (0), 0 states 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 07:48:41,295 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 255.0) internal successors, (22695), 89 states have internal predecessors, (22695), 0 states have call successors, (0), 0 states 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 07:48:41,295 INFO L175 Difference]: Start difference. First operand has 945 places, 5123 transitions, 91912 flow. Second operand 88 states and 6614 transitions. [2023-08-04 07:48:41,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 6680 transitions, 132408 flow Received shutdown request... [2023-08-04 07:50:15,559 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:50:15,568 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:50:15,820 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:50:15,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 07:50:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 07:50:16,025 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-04 07:50:16,025 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:16,025 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 07:50:16,026 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:50:16,026 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:50:16,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:50:16 BasicIcfg [2023-08-04 07:50:16,028 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:50:16,029 INFO L158 Benchmark]: Toolchain (without parser) took 824675.44ms. Allocated memory was 583.0MB in the beginning and 10.6GB in the end (delta: 10.1GB). Free memory was 544.1MB in the beginning and 3.9GB in the end (delta: -3.3GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 385.9MB. Free memory was 338.7MB in the beginning and 338.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.78ms. Allocated memory is still 583.0MB. Free memory was 543.8MB in the beginning and 511.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.25ms. Allocated memory is still 583.0MB. Free memory was 511.1MB in the beginning and 508.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: Boogie Preprocessor took 38.48ms. Allocated memory is still 583.0MB. Free memory was 508.7MB in the beginning and 507.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: RCFGBuilder took 425.98ms. Allocated memory is still 583.0MB. Free memory was 507.0MB in the beginning and 491.7MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 07:50:16,029 INFO L158 Benchmark]: TraceAbstraction took 823725.12ms. Allocated memory was 583.0MB in the beginning and 10.6GB in the end (delta: 10.1GB). Free memory was 491.0MB in the beginning and 3.9GB in the end (delta: -3.4GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2023-08-04 07:50:16,030 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 385.9MB. Free memory was 338.7MB in the beginning and 338.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 433.78ms. Allocated memory is still 583.0MB. Free memory was 543.8MB in the beginning and 511.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.25ms. Allocated memory is still 583.0MB. Free memory was 511.1MB in the beginning and 508.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.48ms. Allocated memory is still 583.0MB. Free memory was 508.7MB in the beginning and 507.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 425.98ms. Allocated memory is still 583.0MB. Free memory was 507.0MB in the beginning and 491.7MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 823725.12ms. Allocated memory was 583.0MB in the beginning and 10.6GB in the end (delta: 10.1GB). Free memory was 491.0MB in the beginning and 3.9GB in the end (delta: -3.4GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 104 PlacesBefore, 32 PlacesAfterwards, 110 TransitionsBefore, 34 TransitionsAfterwards, 2304 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 4 ChoiceCompositions, 95 TotalNumberOfCompositions, 4491 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3053, independent: 2932, independent conditional: 0, independent unconditional: 2932, dependent: 121, dependent conditional: 0, dependent unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1342, independent: 1312, independent conditional: 0, independent unconditional: 1312, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3053, independent: 1620, independent conditional: 0, independent unconditional: 1620, dependent: 91, dependent conditional: 0, dependent unconditional: 91, unknown: 1342, unknown conditional: 0, unknown unconditional: 1342] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 78, Positive conditional cache size: 0, Positive unconditional cache size: 78, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 105 PlacesBefore, 32 PlacesAfterwards, 110 TransitionsBefore, 33 TransitionsAfterwards, 2256 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 4 ChoiceCompositions, 96 TotalNumberOfCompositions, 4168 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2878, independent: 2763, independent conditional: 0, independent unconditional: 2763, dependent: 115, dependent conditional: 0, dependent unconditional: 115, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1302, independent: 1275, independent conditional: 0, independent unconditional: 1275, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2878, independent: 1488, independent conditional: 0, independent unconditional: 1488, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 1302, unknown conditional: 0, unknown unconditional: 1302] , Statistics on independence cache: Total cache size (in pairs): 92, Positive cache size: 82, Positive conditional cache size: 0, Positive unconditional cache size: 82, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 131 PlacesBefore, 46 PlacesAfterwards, 139 TransitionsBefore, 50 TransitionsAfterwards, 6144 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 4 ChoiceCompositions, 113 TotalNumberOfCompositions, 14261 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8687, independent: 8480, independent conditional: 0, independent unconditional: 8480, dependent: 207, dependent conditional: 0, dependent unconditional: 207, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3650, independent: 3598, independent conditional: 0, independent unconditional: 3598, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8687, independent: 4882, independent conditional: 0, independent unconditional: 4882, dependent: 155, dependent conditional: 0, dependent unconditional: 155, unknown: 3650, unknown conditional: 0, unknown unconditional: 3650] , Statistics on independence cache: Total cache size (in pairs): 274, Positive cache size: 253, Positive conditional cache size: 0, Positive unconditional cache size: 253, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 124 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 101 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 270 IncrementalHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 9 mSDtfsCounter, 270 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 147 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 816.8s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 794.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 126 mSolverCounterUnknown, 10925 SdHoareTripleChecker+Valid, 91.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10451 mSDsluCounter, 21957 SdHoareTripleChecker+Invalid, 84.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3886 IncrementalHoareTripleChecker+Unchecked, 21934 mSDsCounter, 1691 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68562 IncrementalHoareTripleChecker+Invalid, 74265 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1691 mSolverCounterUnsat, 23 mSDtfsCounter, 68562 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2176 GetRequests, 1175 SyntacticMatches, 22 SemanticMatches, 979 ConstructedPredicates, 6 IntricatePredicates, 5 DeprecatedPredicates, 32147 ImplicationChecksByTransitivity, 136.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91912occurred in iteration=18, InterpolantAutomatonStates: 719, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 14.5s InterpolantComputationTime, 1415 NumberOfCodeBlocks, 1415 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2010 ConstructedInterpolants, 252 QuantifiedInterpolants, 27178 SizeOfPredicates, 133 NumberOfNonLiveVariables, 4388 ConjunctsInSsa, 550 ConjunctsInUnsatCore, 50 InterpolantComputations, 5 PerfectInterpolantSequences, 485/907 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 124 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown