/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_popl20-bad-three-array-sum-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:06:29,054 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:06:29,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:06:29,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:06:29,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:06:29,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:06:29,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:06:29,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:06:29,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:06:29,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:06:29,141 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:06:29,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:06:29,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:06:29,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:06:29,143 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:06:29,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:06:29,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:06:29,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:06:29,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:06:29,145 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:06:29,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:06:29,145 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:06:29,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:06:29,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:06:29,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:06:29,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:06:29,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:06:29,148 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:06:29,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:06:29,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:06:29,148 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:06:29,148 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:06:29,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:06:29,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:06:29,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:06:29,343 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:06:29,343 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:06:29,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-three-array-sum-alt.wvr_bound2.c [2023-08-04 09:06:30,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:06:30,553 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:06:30,553 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-three-array-sum-alt.wvr_bound2.c [2023-08-04 09:06:30,558 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e3119d6/0db6aeeebbc44a708e9f2ebb7bcb0d45/FLAG91c235857 [2023-08-04 09:06:30,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e3119d6/0db6aeeebbc44a708e9f2ebb7bcb0d45 [2023-08-04 09:06:30,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:06:30,569 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:06:30,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:06:30,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:06:30,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:06:30,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716568ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30, skipping insertion in model container [2023-08-04 09:06:30,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,592 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:06:30,727 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_popl20-bad-three-array-sum-alt.wvr_bound2.c[2655,2668] [2023-08-04 09:06:30,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:06:30,737 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:06:30,755 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_popl20-bad-three-array-sum-alt.wvr_bound2.c[2655,2668] [2023-08-04 09:06:30,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:06:30,770 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:06:30,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30 WrapperNode [2023-08-04 09:06:30,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:06:30,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:06:30,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:06:30,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:06:30,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,787 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,810 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 323 [2023-08-04 09:06:30,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:06:30,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:06:30,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:06:30,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:06:30,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:06:30,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:06:30,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:06:30,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:06:30,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (1/1) ... [2023-08-04 09:06:30,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:06:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:30,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:06:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:06:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:06:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:06:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:06:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:06:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:06:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:06:30,892 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:06:30,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:06:30,992 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:06:30,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:06:31,383 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:06:31,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:06:31,391 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:06:31,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:06:31 BoogieIcfgContainer [2023-08-04 09:06:31,398 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:06:31,401 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:06:31,401 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:06:31,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:06:31,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:06:30" (1/3) ... [2023-08-04 09:06:31,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179fe87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:06:31, skipping insertion in model container [2023-08-04 09:06:31,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:06:30" (2/3) ... [2023-08-04 09:06:31,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179fe87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:06:31, skipping insertion in model container [2023-08-04 09:06:31,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:06:31" (3/3) ... [2023-08-04 09:06:31,407 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-three-array-sum-alt.wvr_bound2.c [2023-08-04 09:06:31,414 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:06:31,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:06:31,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:06:31,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:06:31,525 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:06:31,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:31,879 INFO L124 PetriNetUnfolderBase]: 146/1147 cut-off events. [2023-08-04 09:06:31,879 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:31,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1147 events. 146/1147 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6405 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 634. Up to 16 conditions per place. [2023-08-04 09:06:31,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:31,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:31,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:31,918 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:31,920 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:31,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:32,031 INFO L124 PetriNetUnfolderBase]: 146/1147 cut-off events. [2023-08-04 09:06:32,032 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:32,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1147 events. 146/1147 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6405 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 634. Up to 16 conditions per place. [2023-08-04 09:06:32,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 33488 [2023-08-04 09:06:38,802 INFO L134 LiptonReduction]: Checked pairs total: 42038 [2023-08-04 09:06:38,802 INFO L136 LiptonReduction]: Total number of compositions: 390 [2023-08-04 09:06:38,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:06:38,815 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;@27c82a84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:38,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:06:38,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:38,820 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2023-08-04 09:06:38,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:38,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:38,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:38,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:38,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1754120806, now seen corresponding path program 1 times [2023-08-04 09:06:38,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:38,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764384117] [2023-08-04 09:06:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:38,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:06:39,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764384117] [2023-08-04 09:06:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764384117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:39,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:06:39,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:06:39,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173606869] [2023-08-04 09:06:39,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:06:39,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:39,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:39,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:39,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:39,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:40,112 INFO L124 PetriNetUnfolderBase]: 7100/9775 cut-off events. [2023-08-04 09:06:40,113 INFO L125 PetriNetUnfolderBase]: For 592/592 co-relation queries the response was YES. [2023-08-04 09:06:40,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19684 conditions, 9775 events. 7100/9775 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51029 event pairs, 3419 based on Foata normal form. 0/6522 useless extension candidates. Maximal degree in co-relation 16541. Up to 9471 conditions per place. [2023-08-04 09:06:40,170 INFO L140 encePairwiseOnDemand]: 755/759 looper letters, 51 selfloop transitions, 2 changer transitions 4/63 dead transitions. [2023-08-04 09:06:40,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 276 flow [2023-08-04 09:06:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2023-08-04 09:06:40,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501537110232762 [2023-08-04 09:06:40,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2023-08-04 09:06:40,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2023-08-04 09:06:40,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:40,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2023-08-04 09:06:40,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:40,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:40,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:40,201 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 162 flow. Second operand 3 states and 1025 transitions. [2023-08-04 09:06:40,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 276 flow [2023-08-04 09:06:40,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:06:40,211 INFO L231 Difference]: Finished difference. Result has 54 places, 56 transitions, 156 flow [2023-08-04 09:06:40,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=54, PETRI_TRANSITIONS=56} [2023-08-04 09:06:40,215 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-04 09:06:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 56 transitions, 156 flow [2023-08-04 09:06:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:06:40,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:40,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1145422745, now seen corresponding path program 1 times [2023-08-04 09:06:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69454350] [2023-08-04 09:06:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:06:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69454350] [2023-08-04 09:06:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69454350] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111269491] [2023-08-04 09:06:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:40,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:40,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:06:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:40,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:40,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:06:40,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111269491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:40,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:40,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957857962] [2023-08-04 09:06:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:40,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:40,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:40,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:40,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:41,157 INFO L124 PetriNetUnfolderBase]: 6873/9361 cut-off events. [2023-08-04 09:06:41,157 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-08-04 09:06:41,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 9361 events. 6873/9361 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48011 event pairs, 3355 based on Foata normal form. 0/6211 useless extension candidates. Maximal degree in co-relation 15753. Up to 9109 conditions per place. [2023-08-04 09:06:41,193 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 54 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-04 09:06:41,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 284 flow [2023-08-04 09:06:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-04 09:06:41,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510320597277119 [2023-08-04 09:06:41,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-04 09:06:41,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-04 09:06:41,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:41,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-04 09:06:41,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:41,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:41,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:41,211 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 156 flow. Second operand 3 states and 1027 transitions. [2023-08-04 09:06:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 284 flow [2023-08-04 09:06:41,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 268 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:06:41,214 INFO L231 Difference]: Finished difference. Result has 49 places, 56 transitions, 148 flow [2023-08-04 09:06:41,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=56} [2023-08-04 09:06:41,215 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-04 09:06:41,215 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 56 transitions, 148 flow [2023-08-04 09:06:41,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:41,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:41,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:41,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:41,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:41,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:41,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash -767312530, now seen corresponding path program 1 times [2023-08-04 09:06:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327755114] [2023-08-04 09:06:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:06:41,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327755114] [2023-08-04 09:06:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327755114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:41,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269202331] [2023-08-04 09:06:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:41,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:41,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:06:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:41,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:41,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:06:41,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269202331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450556014] [2023-08-04 09:06:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:41,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:41,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:41,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:41,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:41,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:42,232 INFO L124 PetriNetUnfolderBase]: 6857/9408 cut-off events. [2023-08-04 09:06:42,233 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 09:06:42,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18944 conditions, 9408 events. 6857/9408 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 49531 event pairs, 2796 based on Foata normal form. 0/6323 useless extension candidates. Maximal degree in co-relation 8312. Up to 8678 conditions per place. [2023-08-04 09:06:42,266 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 60 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 09:06:42,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 300 flow [2023-08-04 09:06:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-04 09:06:42,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536671058410189 [2023-08-04 09:06:42,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-04 09:06:42,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-04 09:06:42,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:42,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-04 09:06:42,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:42,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:42,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:42,275 INFO L175 Difference]: Start difference. First operand has 49 places, 56 transitions, 148 flow. Second operand 3 states and 1033 transitions. [2023-08-04 09:06:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 300 flow [2023-08-04 09:06:42,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:06:42,277 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 152 flow [2023-08-04 09:06:42,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-04 09:06:42,277 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-04 09:06:42,277 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 152 flow [2023-08-04 09:06:42,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:42,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:42,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:42,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:06:42,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:42,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1424122651, now seen corresponding path program 1 times [2023-08-04 09:06:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:42,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739117476] [2023-08-04 09:06:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:06:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739117476] [2023-08-04 09:06:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739117476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831841448] [2023-08-04 09:06:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:42,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:42,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:42,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:42,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:06:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:42,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:42,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:06:42,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831841448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:42,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:42,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395045379] [2023-08-04 09:06:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:42,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:42,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:42,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:42,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:42,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:42,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:42,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:43,015 INFO L124 PetriNetUnfolderBase]: 3917/5526 cut-off events. [2023-08-04 09:06:43,016 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-04 09:06:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 5526 events. 3917/5526 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 27230 event pairs, 1813 based on Foata normal form. 0/3882 useless extension candidates. Maximal degree in co-relation 4682. Up to 4100 conditions per place. [2023-08-04 09:06:43,029 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:06:43,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 326 flow [2023-08-04 09:06:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1037 transitions. [2023-08-04 09:06:43,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554238032498902 [2023-08-04 09:06:43,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:43,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,038 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 152 flow. Second operand 3 states and 1037 transitions. [2023-08-04 09:06:43,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 326 flow [2023-08-04 09:06:43,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:06:43,039 INFO L231 Difference]: Finished difference. Result has 51 places, 57 transitions, 160 flow [2023-08-04 09:06:43,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=51, PETRI_TRANSITIONS=57} [2023-08-04 09:06:43,040 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-04 09:06:43,040 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 57 transitions, 160 flow [2023-08-04 09:06:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:43,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:43,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:06:43,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:43,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:43,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1880713997, now seen corresponding path program 1 times [2023-08-04 09:06:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:43,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154390156] [2023-08-04 09:06:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:43,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:06:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154390156] [2023-08-04 09:06:43,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154390156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113851905] [2023-08-04 09:06:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:43,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:43,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:06:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:43,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:43,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:06:43,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113851905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:43,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460495710] [2023-08-04 09:06:43,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:43,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:43,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:43,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:43,816 INFO L124 PetriNetUnfolderBase]: 3196/4512 cut-off events. [2023-08-04 09:06:43,816 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2023-08-04 09:06:43,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9684 conditions, 4512 events. 3196/4512 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21186 event pairs, 1763 based on Foata normal form. 0/3309 useless extension candidates. Maximal degree in co-relation 4094. Up to 3784 conditions per place. [2023-08-04 09:06:43,832 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 09:06:43,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 336 flow [2023-08-04 09:06:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1037 transitions. [2023-08-04 09:06:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554238032498902 [2023-08-04 09:06:43,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:43,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1037 transitions. [2023-08-04 09:06:43,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,840 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 160 flow. Second operand 3 states and 1037 transitions. [2023-08-04 09:06:43,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 336 flow [2023-08-04 09:06:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:43,845 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 170 flow [2023-08-04 09:06:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2023-08-04 09:06:43,846 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-04 09:06:43,846 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 170 flow [2023-08-04 09:06:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:43,846 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] [2023-08-04 09:06:43,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:44,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:44,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:44,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1887070926, now seen corresponding path program 1 times [2023-08-04 09:06:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133076345] [2023-08-04 09:06:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:06:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133076345] [2023-08-04 09:06:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133076345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760249243] [2023-08-04 09:06:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:44,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:44,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:44,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:06:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:44,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:44,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:44,247 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 09:06:44,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760249243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:44,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:44,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:44,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624946583] [2023-08-04 09:06:44,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:44,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:44,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 759 [2023-08-04 09:06:44,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 332.3333333333333) internal successors, (997), 3 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:44,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:44,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 759 [2023-08-04 09:06:44,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:44,567 INFO L124 PetriNetUnfolderBase]: 3159/4447 cut-off events. [2023-08-04 09:06:44,567 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2023-08-04 09:06:44,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9620 conditions, 4447 events. 3159/4447 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20787 event pairs, 1980 based on Foata normal form. 0/3287 useless extension candidates. Maximal degree in co-relation 7811. Up to 4259 conditions per place. [2023-08-04 09:06:44,578 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 60 selfloop transitions, 2 changer transitions 3/71 dead transitions. [2023-08-04 09:06:44,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 326 flow [2023-08-04 09:06:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-04 09:06:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536671058410189 [2023-08-04 09:06:44,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-04 09:06:44,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-04 09:06:44,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:44,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-04 09:06:44,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:44,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:44,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 759.0) internal successors, (3036), 4 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:44,587 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 170 flow. Second operand 3 states and 1033 transitions. [2023-08-04 09:06:44,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 326 flow [2023-08-04 09:06:44,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:44,591 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 168 flow [2023-08-04 09:06:44,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-04 09:06:44,592 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-04 09:06:44,592 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 168 flow [2023-08-04 09:06:44,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.3333333333333) internal successors, (997), 3 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:44,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:44,593 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, 1, 1] [2023-08-04 09:06:44,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:44,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:44,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:44,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash -434999949, now seen corresponding path program 1 times [2023-08-04 09:06:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:44,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286525301] [2023-08-04 09:06:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:44,866 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 09:06:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286525301] [2023-08-04 09:06:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286525301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728637577] [2023-08-04 09:06:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:44,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:44,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:44,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:06:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:44,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:06:44,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:45,020 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 09:06:45,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:06:45,040 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 09:06:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728637577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:06:45,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:06:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:06:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822562847] [2023-08-04 09:06:45,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:06:45,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:06:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:06:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:45,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 759 [2023-08-04 09:06:45,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 329.4) internal successors, (1647), 5 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:45,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:45,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 759 [2023-08-04 09:06:45,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:45,078 INFO L124 PetriNetUnfolderBase]: 13/30 cut-off events. [2023-08-04 09:06:45,079 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:06:45,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 30 events. 13/30 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 38 event pairs, 3 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 63. Up to 17 conditions per place. [2023-08-04 09:06:45,079 INFO L140 encePairwiseOnDemand]: 756/759 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 09:06:45,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 74 flow [2023-08-04 09:06:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:06:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:06:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1306 transitions. [2023-08-04 09:06:45,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43017127799736493 [2023-08-04 09:06:45,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1306 transitions. [2023-08-04 09:06:45,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1306 transitions. [2023-08-04 09:06:45,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:45,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1306 transitions. [2023-08-04 09:06:45,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.5) internal successors, (1306), 4 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:45,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 759.0) internal successors, (3795), 5 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:45,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 759.0) internal successors, (3795), 5 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:45,091 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 168 flow. Second operand 4 states and 1306 transitions. [2023-08-04 09:06:45,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 74 flow [2023-08-04 09:06:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:45,092 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 09:06:45,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 09:06:45,093 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -29 predicate places. [2023-08-04 09:06:45,093 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 09:06:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 329.4) internal successors, (1647), 5 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:45,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:06:45,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:45,320 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 09:06:45,321 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:45,323 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:06:45,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,447 INFO L124 PetriNetUnfolderBase]: 146/1147 cut-off events. [2023-08-04 09:06:45,447 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1147 events. 146/1147 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6405 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 634. Up to 16 conditions per place. [2023-08-04 09:06:45,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:45,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 369 transitions, 780 flow [2023-08-04 09:06:45,567 INFO L124 PetriNetUnfolderBase]: 146/1147 cut-off events. [2023-08-04 09:06:45,568 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:45,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1147 events. 146/1147 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6405 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 634. Up to 16 conditions per place. [2023-08-04 09:06:45,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 33488 [2023-08-04 09:06:52,141 INFO L134 LiptonReduction]: Checked pairs total: 43704 [2023-08-04 09:06:52,141 INFO L136 LiptonReduction]: Total number of compositions: 389 [2023-08-04 09:06:52,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:06:52,143 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;@27c82a84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:52,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:06:52,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:52,145 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:06:52,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:52,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:52,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:52,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:06:52,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1161066285, now seen corresponding path program 1 times [2023-08-04 09:06:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:52,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542643476] [2023-08-04 09:06:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:52,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:06:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:52,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:06:52,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:06:52,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:06:52,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:06:52,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:06:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:06:52,252 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:06:52,252 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:06:52,252 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:06:52,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:06:52,310 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:06:52,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:53,289 INFO L124 PetriNetUnfolderBase]: 1114/6557 cut-off events. [2023-08-04 09:06:53,290 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:53,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 6557 events. 1114/6557 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 60602 event pairs, 22 based on Foata normal form. 0/5687 useless extension candidates. Maximal degree in co-relation 3859. Up to 192 conditions per place. [2023-08-04 09:06:53,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:53,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:53,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:53,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:53,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:53,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 506 transitions, 1102 flow [2023-08-04 09:06:54,408 INFO L124 PetriNetUnfolderBase]: 1114/6557 cut-off events. [2023-08-04 09:06:54,408 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:54,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 6557 events. 1114/6557 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 60602 event pairs, 22 based on Foata normal form. 0/5687 useless extension candidates. Maximal degree in co-relation 3859. Up to 192 conditions per place. [2023-08-04 09:06:54,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 103372 [2023-08-04 09:07:02,763 INFO L134 LiptonReduction]: Checked pairs total: 162603 [2023-08-04 09:07:02,763 INFO L136 LiptonReduction]: Total number of compositions: 525 [2023-08-04 09:07:02,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:07:02,766 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;@27c82a84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:07:02,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:07:02,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:07:02,768 INFO L124 PetriNetUnfolderBase]: 5/49 cut-off events. [2023-08-04 09:07:02,768 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 09:07:02,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:07:02,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:07:02,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:07:02,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:07:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1201783732, now seen corresponding path program 1 times [2023-08-04 09:07:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:07:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232557366] [2023-08-04 09:07:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:07:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:07:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:07:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:07:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:07:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232557366] [2023-08-04 09:07:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232557366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:07:02,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:07:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:07:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918696415] [2023-08-04 09:07:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:07:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:07:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:07:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:07:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:07:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 437 out of 1031 [2023-08-04 09:07:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:07:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:07:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 437 of 1031 [2023-08-04 09:07:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand