/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:34:22,932 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:34:23,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:34:23,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:34:23,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:34:23,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:34:23,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:34:23,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:34:23,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:34:23,038 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:34:23,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:34:23,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:34:23,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:34:23,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:34:23,041 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:34:23,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:34:23,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:34:23,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:34:23,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:34:23,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:34:23,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:34:23,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:34:23,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:34:23,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:34:23,043 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:34:23,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:34:23,043 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:34:23,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:34:23,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:34:23,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:34:23,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:34:23,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:34:23,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:34:23,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:34:23,047 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:34:23,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:34:23,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:34:23,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:34:23,327 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:34:23,327 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:34:23,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-subst.wvr_bound2.c [2023-08-04 08:34:24,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:34:24,660 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:34:24,661 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-subst.wvr_bound2.c [2023-08-04 08:34:24,667 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08d1a7872/5d6062d8a381471393ff24da2f4d0d41/FLAG3fe3b99b6 [2023-08-04 08:34:24,679 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08d1a7872/5d6062d8a381471393ff24da2f4d0d41 [2023-08-04 08:34:24,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:34:24,681 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:34:24,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:34:24,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:34:24,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:34:24,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6521bee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24, skipping insertion in model container [2023-08-04 08:34:24,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,721 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:34:24,872 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-subst.wvr_bound2.c[3588,3601] [2023-08-04 08:34:24,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:34:24,884 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:34:24,908 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-subst.wvr_bound2.c[3588,3601] [2023-08-04 08:34:24,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:34:24,923 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:34:24,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24 WrapperNode [2023-08-04 08:34:24,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:34:24,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:34:24,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:34:24,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:34:24,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,961 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 233 [2023-08-04 08:34:24,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:34:24,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:34:24,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:34:24,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:34:24,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,995 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:24,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:34:25,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:34:25,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:34:25,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:34:25,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (1/1) ... [2023-08-04 08:34:25,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:34:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:25,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:34:25,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:34:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:34:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:34:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:34:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:34:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:34:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:34:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:34:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:34:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:34:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:34:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:34:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:34:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:34:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:34:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:34:25,063 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:34:25,157 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:34:25,158 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:34:25,561 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:34:25,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:34:25,577 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:34:25,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:34:25 BoogieIcfgContainer [2023-08-04 08:34:25,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:34:25,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:34:25,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:34:25,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:34:25,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:34:24" (1/3) ... [2023-08-04 08:34:25,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6eec4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:34:25, skipping insertion in model container [2023-08-04 08:34:25,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:34:24" (2/3) ... [2023-08-04 08:34:25,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6eec4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:34:25, skipping insertion in model container [2023-08-04 08:34:25,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:34:25" (3/3) ... [2023-08-04 08:34:25,590 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-word-subst.wvr_bound2.c [2023-08-04 08:34:25,598 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:34:25,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:34:25,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:34:25,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:34:25,710 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:34:25,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,013 INFO L124 PetriNetUnfolderBase]: 137/935 cut-off events. [2023-08-04 08:34:26,013 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:34:26,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 935 events. 137/935 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4845 event pairs, 0 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 535. Up to 16 conditions per place. [2023-08-04 08:34:26,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:34:26,066 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:26,230 INFO L124 PetriNetUnfolderBase]: 137/935 cut-off events. [2023-08-04 08:34:26,230 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:34:26,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 935 events. 137/935 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4845 event pairs, 0 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 535. Up to 16 conditions per place. [2023-08-04 08:34:26,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 20340 [2023-08-04 08:34:34,456 INFO L134 LiptonReduction]: Checked pairs total: 39905 [2023-08-04 08:34:34,457 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-08-04 08:34:34,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:34:34,475 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;@7b2710a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:34:34,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:34:34,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:34:34,485 INFO L124 PetriNetUnfolderBase]: 10/60 cut-off events. [2023-08-04 08:34:34,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:34:34,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:34,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:34,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:34,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1181645158, now seen corresponding path program 1 times [2023-08-04 08:34:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:34,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192501128] [2023-08-04 08:34:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:34:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:34,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192501128] [2023-08-04 08:34:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192501128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:34,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:34:34,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159127915] [2023-08-04 08:34:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:34,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:34:34,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:34,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:34,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:34,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:36,845 INFO L124 PetriNetUnfolderBase]: 17851/25398 cut-off events. [2023-08-04 08:34:36,845 INFO L125 PetriNetUnfolderBase]: For 1097/1097 co-relation queries the response was YES. [2023-08-04 08:34:36,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49347 conditions, 25398 events. 17851/25398 cut-off events. For 1097/1097 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 149282 event pairs, 7188 based on Foata normal form. 448/17634 useless extension candidates. Maximal degree in co-relation 44466. Up to 23179 conditions per place. [2023-08-04 08:34:37,010 INFO L140 encePairwiseOnDemand]: 664/669 looper letters, 71 selfloop transitions, 2 changer transitions 4/85 dead transitions. [2023-08-04 08:34:37,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 360 flow [2023-08-04 08:34:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1001 transitions. [2023-08-04 08:34:37,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987543597409068 [2023-08-04 08:34:37,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1001 transitions. [2023-08-04 08:34:37,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1001 transitions. [2023-08-04 08:34:37,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:37,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1001 transitions. [2023-08-04 08:34:37,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:37,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:37,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:37,055 INFO L175 Difference]: Start difference. First operand has 62 places, 77 transitions, 196 flow. Second operand 3 states and 1001 transitions. [2023-08-04 08:34:37,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 360 flow [2023-08-04 08:34:37,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:34:37,065 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 188 flow [2023-08-04 08:34:37,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-08-04 08:34:37,071 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 08:34:37,071 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 188 flow [2023-08-04 08:34:37,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:37,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:37,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:34:37,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:37,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 58241250, now seen corresponding path program 1 times [2023-08-04 08:34:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614829173] [2023-08-04 08:34:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:37,240 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 08:34:37,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614829173] [2023-08-04 08:34:37,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614829173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648818851] [2023-08-04 08:34:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:37,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:37,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:37,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:34:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:37,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:37,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:37,424 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 08:34:37,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:37,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648818851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:37,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:37,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:37,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182424169] [2023-08-04 08:34:37,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:37,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:37,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:37,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:37,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:37,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:37,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:39,065 INFO L124 PetriNetUnfolderBase]: 17441/23874 cut-off events. [2023-08-04 08:34:39,065 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2023-08-04 08:34:39,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47150 conditions, 23874 events. 17441/23874 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 130970 event pairs, 8029 based on Foata normal form. 0/16081 useless extension candidates. Maximal degree in co-relation 42352. Up to 22471 conditions per place. [2023-08-04 08:34:39,189 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 79 selfloop transitions, 2 changer transitions 1/90 dead transitions. [2023-08-04 08:34:39,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 388 flow [2023-08-04 08:34:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2023-08-04 08:34:39,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017438963627304 [2023-08-04 08:34:39,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2023-08-04 08:34:39,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2023-08-04 08:34:39,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:39,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2023-08-04 08:34:39,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:39,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:39,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:39,208 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 188 flow. Second operand 3 states and 1007 transitions. [2023-08-04 08:34:39,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 388 flow [2023-08-04 08:34:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 372 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:34:39,217 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 180 flow [2023-08-04 08:34:39,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2023-08-04 08:34:39,218 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2023-08-04 08:34:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 180 flow [2023-08-04 08:34:39,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:39,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:39,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:39,428 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 08:34:39,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:39,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1473477, now seen corresponding path program 1 times [2023-08-04 08:34:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:39,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288393743] [2023-08-04 08:34:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:39,640 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 08:34:39,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:39,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288393743] [2023-08-04 08:34:39,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288393743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:39,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904282162] [2023-08-04 08:34:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:39,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:39,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:39,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:39,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:34:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:39,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:39,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:34:39,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904282162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:39,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:39,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875211371] [2023-08-04 08:34:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:39,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:39,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:39,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:39,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:39,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:41,085 INFO L124 PetriNetUnfolderBase]: 17399/23632 cut-off events. [2023-08-04 08:34:41,085 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 08:34:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46942 conditions, 23632 events. 17399/23632 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 126536 event pairs, 7475 based on Foata normal form. 0/15882 useless extension candidates. Maximal degree in co-relation 23834. Up to 21084 conditions per place. [2023-08-04 08:34:41,177 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 88 selfloop transitions, 2 changer transitions 1/99 dead transitions. [2023-08-04 08:34:41,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 416 flow [2023-08-04 08:34:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-04 08:34:41,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062282012954659 [2023-08-04 08:34:41,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-04 08:34:41,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-04 08:34:41,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:41,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-04 08:34:41,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:41,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:41,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:41,189 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 180 flow. Second operand 3 states and 1016 transitions. [2023-08-04 08:34:41,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 416 flow [2023-08-04 08:34:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 99 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:41,194 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 184 flow [2023-08-04 08:34:41,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2023-08-04 08:34:41,196 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-08-04 08:34:41,196 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 184 flow [2023-08-04 08:34:41,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:41,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:41,197 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 08:34:41,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:34:41,402 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 08:34:41,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:41,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1360690242, now seen corresponding path program 1 times [2023-08-04 08:34:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:41,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359267113] [2023-08-04 08:34:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:41,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:34:41,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:41,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359267113] [2023-08-04 08:34:41,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359267113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:41,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839216343] [2023-08-04 08:34:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:41,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:41,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:41,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:41,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:34:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:41,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:41,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:34:41,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839216343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420995895] [2023-08-04 08:34:41,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:41,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:41,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:41,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:41,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:41,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:42,391 INFO L124 PetriNetUnfolderBase]: 9553/13251 cut-off events. [2023-08-04 08:34:42,392 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-04 08:34:42,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27295 conditions, 13251 events. 9553/13251 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 67547 event pairs, 4335 based on Foata normal form. 0/9388 useless extension candidates. Maximal degree in co-relation 13218. Up to 9339 conditions per place. [2023-08-04 08:34:42,437 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 93 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-04 08:34:42,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 442 flow [2023-08-04 08:34:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-04 08:34:42,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082212257100149 [2023-08-04 08:34:42,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-04 08:34:42,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-04 08:34:42,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:42,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-04 08:34:42,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 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 08:34:42,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:42,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:42,450 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 184 flow. Second operand 3 states and 1020 transitions. [2023-08-04 08:34:42,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 442 flow [2023-08-04 08:34:42,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 103 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:42,453 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 192 flow [2023-08-04 08:34:42,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 08:34:42,454 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2023-08-04 08:34:42,454 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 192 flow [2023-08-04 08:34:42,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:42,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:42,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:42,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:42,660 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 08:34:42,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:42,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:42,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1425529226, now seen corresponding path program 1 times [2023-08-04 08:34:42,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:42,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489308230] [2023-08-04 08:34:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:42,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:34:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:42,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489308230] [2023-08-04 08:34:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489308230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735086594] [2023-08-04 08:34:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:42,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:42,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:42,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:42,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:34:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:42,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:42,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:34:42,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:42,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735086594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:42,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:42,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137776400] [2023-08-04 08:34:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:42,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:42,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:42,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:42,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:42,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:43,642 INFO L124 PetriNetUnfolderBase]: 8137/11245 cut-off events. [2023-08-04 08:34:43,642 INFO L125 PetriNetUnfolderBase]: For 1391/1391 co-relation queries the response was YES. [2023-08-04 08:34:43,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23727 conditions, 11245 events. 8137/11245 cut-off events. For 1391/1391 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 55154 event pairs, 4690 based on Foata normal form. 0/8260 useless extension candidates. Maximal degree in co-relation 11852. Up to 9656 conditions per place. [2023-08-04 08:34:43,690 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 94 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 08:34:43,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 452 flow [2023-08-04 08:34:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-04 08:34:43,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082212257100149 [2023-08-04 08:34:43,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-04 08:34:43,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-04 08:34:43,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:43,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-04 08:34:43,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 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 08:34:43,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:43,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:43,702 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 192 flow. Second operand 3 states and 1020 transitions. [2023-08-04 08:34:43,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 452 flow [2023-08-04 08:34:43,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:43,724 INFO L231 Difference]: Finished difference. Result has 63 places, 74 transitions, 202 flow [2023-08-04 08:34:43,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=74} [2023-08-04 08:34:43,725 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-08-04 08:34:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 74 transitions, 202 flow [2023-08-04 08:34:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:43,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:43,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:34:43,935 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 08:34:43,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:43,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1064454112, now seen corresponding path program 1 times [2023-08-04 08:34:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:43,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290629927] [2023-08-04 08:34:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:34:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290629927] [2023-08-04 08:34:44,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290629927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895960258] [2023-08-04 08:34:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:44,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:44,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:44,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:34:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:44,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:44,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:44,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:44,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895960258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:44,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:44,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179587235] [2023-08-04 08:34:44,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:44,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:44,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:44,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 669 [2023-08-04 08:34:44,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:44,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:44,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 669 [2023-08-04 08:34:44,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:44,872 INFO L124 PetriNetUnfolderBase]: 8084/11134 cut-off events. [2023-08-04 08:34:44,872 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2023-08-04 08:34:44,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23611 conditions, 11134 events. 8084/11134 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 54338 event pairs, 5126 based on Foata normal form. 0/8208 useless extension candidates. Maximal degree in co-relation 20515. Up to 10589 conditions per place. [2023-08-04 08:34:44,896 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 88 selfloop transitions, 2 changer transitions 3/101 dead transitions. [2023-08-04 08:34:44,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 442 flow [2023-08-04 08:34:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-04 08:34:44,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062282012954659 [2023-08-04 08:34:44,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-04 08:34:44,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-04 08:34:44,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:44,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-04 08:34:44,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:44,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:44,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 669.0) internal successors, (2676), 4 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:44,907 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 202 flow. Second operand 3 states and 1016 transitions. [2023-08-04 08:34:44,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 442 flow [2023-08-04 08:34:44,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:44,932 INFO L231 Difference]: Finished difference. Result has 65 places, 72 transitions, 200 flow [2023-08-04 08:34:44,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=65, PETRI_TRANSITIONS=72} [2023-08-04 08:34:44,933 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-08-04 08:34:44,933 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 72 transitions, 200 flow [2023-08-04 08:34:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:44,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:44,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:44,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:45,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:45,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:45,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash -333069707, now seen corresponding path program 1 times [2023-08-04 08:34:45,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:45,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675149664] [2023-08-04 08:34:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:45,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:45,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:45,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675149664] [2023-08-04 08:34:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675149664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:45,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691864856] [2023-08-04 08:34:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:45,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:45,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:45,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:34:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:45,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:45,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:45,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691864856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:45,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:45,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:34:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371056247] [2023-08-04 08:34:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:45,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:45,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 669 [2023-08-04 08:34:45,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 72 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:45,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 669 [2023-08-04 08:34:45,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:45,420 INFO L124 PetriNetUnfolderBase]: 24/51 cut-off events. [2023-08-04 08:34:45,420 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:34:45,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 51 events. 24/51 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 1 based on Foata normal form. 7/47 useless extension candidates. Maximal degree in co-relation 109. Up to 32 conditions per place. [2023-08-04 08:34:45,420 INFO L140 encePairwiseOnDemand]: 666/669 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-04 08:34:45,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 122 flow [2023-08-04 08:34:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1258 transitions. [2023-08-04 08:34:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701046337817638 [2023-08-04 08:34:45,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1258 transitions. [2023-08-04 08:34:45,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1258 transitions. [2023-08-04 08:34:45,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:45,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1258 transitions. [2023-08-04 08:34:45,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.5) internal successors, (1258), 4 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 669.0) internal successors, (3345), 5 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,432 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 669.0) internal successors, (3345), 5 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,433 INFO L175 Difference]: Start difference. First operand has 65 places, 72 transitions, 200 flow. Second operand 4 states and 1258 transitions. [2023-08-04 08:34:45,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 122 flow [2023-08-04 08:34:45,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:45,433 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-04 08:34:45,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=669, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-04 08:34:45,434 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -35 predicate places. [2023-08-04 08:34:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-04 08:34:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:34:45,442 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 08:34:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:45,641 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:45,643 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:34:45,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,732 INFO L124 PetriNetUnfolderBase]: 137/935 cut-off events. [2023-08-04 08:34:45,732 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:34:45,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 935 events. 137/935 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4845 event pairs, 0 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 535. Up to 16 conditions per place. [2023-08-04 08:34:45,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:34:45,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 345 transitions, 732 flow [2023-08-04 08:34:45,825 INFO L124 PetriNetUnfolderBase]: 137/935 cut-off events. [2023-08-04 08:34:45,826 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:34:45,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 935 events. 137/935 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4845 event pairs, 0 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 535. Up to 16 conditions per place. [2023-08-04 08:34:45,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 20340 [2023-08-04 08:34:53,089 INFO L134 LiptonReduction]: Checked pairs total: 42033 [2023-08-04 08:34:53,089 INFO L136 LiptonReduction]: Total number of compositions: 335 [2023-08-04 08:34:53,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:34:53,091 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;@7b2710a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:34:53,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:34:53,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:34:53,096 INFO L124 PetriNetUnfolderBase]: 8/43 cut-off events. [2023-08-04 08:34:53,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:34:53,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:53,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:53,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:53,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:53,097 INFO L85 PathProgramCache]: Analyzing trace with hash 979553616, now seen corresponding path program 1 times [2023-08-04 08:34:53,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:53,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50702009] [2023-08-04 08:34:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:34:53,142 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:34:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:34:53,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:34:53,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:34:53,195 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:34:53,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:34:53,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:34:53,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:34:53,196 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:34:53,197 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:34:53,197 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:34:53,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:34:53,248 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:34:53,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,064 INFO L124 PetriNetUnfolderBase]: 1040/5140 cut-off events. [2023-08-04 08:34:54,065 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:34:54,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5814 conditions, 5140 events. 1040/5140 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 42961 event pairs, 22 based on Foata normal form. 0/4344 useless extension candidates. Maximal degree in co-relation 3085. Up to 192 conditions per place. [2023-08-04 08:34:54,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:34:54,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 447 transitions, 984 flow [2023-08-04 08:34:54,985 INFO L124 PetriNetUnfolderBase]: 1040/5140 cut-off events. [2023-08-04 08:34:54,985 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:34:55,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5814 conditions, 5140 events. 1040/5140 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 42961 event pairs, 22 based on Foata normal form. 0/4344 useless extension candidates. Maximal degree in co-relation 3085. Up to 192 conditions per place. [2023-08-04 08:34:55,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 60660 [2023-08-04 08:35:03,500 INFO L134 LiptonReduction]: Checked pairs total: 133641 [2023-08-04 08:35:03,500 INFO L136 LiptonReduction]: Total number of compositions: 408 [2023-08-04 08:35:03,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:35:03,503 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;@7b2710a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:35:03,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:35:03,507 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:35:03,507 INFO L124 PetriNetUnfolderBase]: 10/55 cut-off events. [2023-08-04 08:35:03,507 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:35:03,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:03,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:03,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:03,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:03,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1090863372, now seen corresponding path program 1 times [2023-08-04 08:35:03,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:03,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130304077] [2023-08-04 08:35:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:03,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:35:03,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130304077] [2023-08-04 08:35:03,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130304077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:03,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:35:03,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:35:03,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651999499] [2023-08-04 08:35:03,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:03,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:03,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:03,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:35:03,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 855 [2023-08-04 08:35:03,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 398.3333333333333) internal successors, (1195), 3 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:03,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:03,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 855 [2023-08-04 08:35:03,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand