/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:58:22,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:58:22,881 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:58:22,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:58:22,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:58:22,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:58:22,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:58:22,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:58:22,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:58:22,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:58:22,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:58:22,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:58:22,900 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:58:22,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:58:22,900 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:58:22,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:58:22,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:58:22,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:58:22,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:58:22,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:58:22,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:58:22,902 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:58:22,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:58:22,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:58:22,903 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:58:22,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:58:22,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:58:22,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:58:22,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:58:22,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:58:22,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:58:22,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:58:22,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:58:22,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:58:22,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:58:22,909 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:58:22,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:58:23,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:58:23,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:58:23,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:58:23,122 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:58:23,123 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:58:23,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-03 18:58:24,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:58:24,358 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:58:24,359 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-03 18:58:24,374 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b0ddc7e/a5af25b8b1b94b2ab9eedee709fec6ed/FLAGa9e0df9be [2023-08-03 18:58:24,390 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b0ddc7e/a5af25b8b1b94b2ab9eedee709fec6ed [2023-08-03 18:58:24,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:58:24,396 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:58:24,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:58:24,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:58:24,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:58:24,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541b32c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24, skipping insertion in model container [2023-08-03 18:58:24,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,451 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:58:24,776 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-03 18:58:24,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:58:24,802 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:58:24,813 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-03 18:58:24,815 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-03 18:58:24,825 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-03 18:58:24,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:58:24,869 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:58:24,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24 WrapperNode [2023-08-03 18:58:24,870 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:58:24,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:58:24,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:58:24,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:58:24,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,919 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2023-08-03 18:58:24,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:58:24,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:58:24,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:58:24,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:58:24,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:58:24,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:58:24,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:58:24,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:58:24,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (1/1) ... [2023-08-03 18:58:24,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:58:24,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:24,983 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) [2023-08-03 18:58:25,003 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 [2023-08-03 18:58:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:58:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 18:58:25,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 18:58:25,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:58:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:58:25,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:58:25,009 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:58:25,092 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:58:25,093 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:58:25,237 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:58:25,242 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:58:25,242 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-03 18:58:25,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:58:25 BoogieIcfgContainer [2023-08-03 18:58:25,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:58:25,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:58:25,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:58:25,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:58:25,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:58:24" (1/3) ... [2023-08-03 18:58:25,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbb8f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:58:25, skipping insertion in model container [2023-08-03 18:58:25,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:58:24" (2/3) ... [2023-08-03 18:58:25,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbb8f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:58:25, skipping insertion in model container [2023-08-03 18:58:25,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:58:25" (3/3) ... [2023-08-03 18:58:25,249 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_bigshot_s_bound2.i [2023-08-03 18:58:25,256 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:58:25,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:58:25,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:58:25,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:58:25,321 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 18:58:25,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 117 transitions, 256 flow [2023-08-03 18:58:25,411 INFO L124 PetriNetUnfolderBase]: 31/262 cut-off events. [2023-08-03 18:58:25,411 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 18:58:25,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 31/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 966 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-08-03 18:58:25,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 117 transitions, 256 flow [2023-08-03 18:58:25,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 116 transitions, 251 flow [2023-08-03 18:58:25,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:58:25,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 116 transitions, 251 flow [2023-08-03 18:58:25,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 116 transitions, 251 flow [2023-08-03 18:58:25,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 251 flow [2023-08-03 18:58:25,463 INFO L124 PetriNetUnfolderBase]: 31/262 cut-off events. [2023-08-03 18:58:25,463 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 18:58:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 31/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 966 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-08-03 18:58:25,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 2556 [2023-08-03 18:58:27,517 INFO L134 LiptonReduction]: Checked pairs total: 4289 [2023-08-03 18:58:27,517 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-03 18:58:27,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:58:27,543 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;@1465d3a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:58:27,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 18:58:27,548 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:58:27,548 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-03 18:58:27,548 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:58:27,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:27,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 18:58:27,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:27,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 264499928, now seen corresponding path program 1 times [2023-08-03 18:58:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:27,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531249782] [2023-08-03 18:58:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:58:27,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:27,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531249782] [2023-08-03 18:58:27,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531249782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:27,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:58:27,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:58:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344160947] [2023-08-03 18:58:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:27,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:58:27,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-03 18:58:27,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 35 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:27,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:27,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-03 18:58:27,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:27,824 INFO L124 PetriNetUnfolderBase]: 330/605 cut-off events. [2023-08-03 18:58:27,824 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 18:58:27,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 605 events. 330/605 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2523 event pairs, 111 based on Foata normal form. 41/472 useless extension candidates. Maximal degree in co-relation 907. Up to 550 conditions per place. [2023-08-03 18:58:27,828 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 29 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-03 18:58:27,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 159 flow [2023-08-03 18:58:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-03 18:58:27,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169753086419753 [2023-08-03 18:58:27,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-03 18:58:27,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-03 18:58:27,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:27,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-03 18:58:27,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:27,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:27,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:27,848 INFO L175 Difference]: Start difference. First operand has 33 places, 35 transitions, 89 flow. Second operand 3 states and 335 transitions. [2023-08-03 18:58:27,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 159 flow [2023-08-03 18:58:27,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:58:27,852 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 91 flow [2023-08-03 18:58:27,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-03 18:58:27,855 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 18:58:27,855 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 91 flow [2023-08-03 18:58:27,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:27,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:27,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:58:27,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:58:27,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:27,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 278477080, now seen corresponding path program 1 times [2023-08-03 18:58:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:27,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395819054] [2023-08-03 18:58:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:58:27,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:58:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:58:27,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:58:27,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:58:27,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 18:58:27,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 18:58:27,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 18:58:27,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:58:27,901 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:58:27,903 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:58:27,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:58:27,924 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 18:58:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 342 flow [2023-08-03 18:58:27,989 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-03 18:58:27,989 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-03 18:58:27,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4816 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-03 18:58:27,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 147 transitions, 342 flow [2023-08-03 18:58:27,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 145 transitions, 332 flow [2023-08-03 18:58:27,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:58:27,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 145 transitions, 332 flow [2023-08-03 18:58:27,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 145 transitions, 332 flow [2023-08-03 18:58:27,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 145 transitions, 332 flow [2023-08-03 18:58:28,054 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-03 18:58:28,055 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-03 18:58:28,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4811 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-03 18:58:28,072 INFO L119 LiptonReduction]: Number of co-enabled transitions 6648 [2023-08-03 18:58:30,187 INFO L134 LiptonReduction]: Checked pairs total: 15145 [2023-08-03 18:58:30,187 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-03 18:58:30,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:58:30,196 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;@1465d3a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:58:30,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 18:58:30,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:58:30,199 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-03 18:58:30,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:58:30,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:30,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 18:58:30,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:30,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash 331125156, now seen corresponding path program 1 times [2023-08-03 18:58:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488914983] [2023-08-03 18:58:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:58:30,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488914983] [2023-08-03 18:58:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488914983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:30,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:58:30,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:58:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814708530] [2023-08-03 18:58:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:30,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:58:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-03 18:58:30,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-03 18:58:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:31,370 INFO L124 PetriNetUnfolderBase]: 12730/18018 cut-off events. [2023-08-03 18:58:31,370 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2023-08-03 18:58:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35616 conditions, 18018 events. 12730/18018 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 96400 event pairs, 6710 based on Foata normal form. 1640/14737 useless extension candidates. Maximal degree in co-relation 12375. Up to 16851 conditions per place. [2023-08-03 18:58:31,485 INFO L140 encePairwiseOnDemand]: 260/265 looper letters, 42 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2023-08-03 18:58:31,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 242 flow [2023-08-03 18:58:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-03 18:58:31,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-03 18:58:31,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-03 18:58:31,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-03 18:58:31,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:31,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-03 18:58:31,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:31,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:31,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:31,492 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 146 flow. Second operand 3 states and 418 transitions. [2023-08-03 18:58:31,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 242 flow [2023-08-03 18:58:31,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:58:31,494 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 150 flow [2023-08-03 18:58:31,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-03 18:58:31,495 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-03 18:58:31,495 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 150 flow [2023-08-03 18:58:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:31,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:31,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:31,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:58:31,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:31,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1661199502, now seen corresponding path program 1 times [2023-08-03 18:58:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:31,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843453068] [2023-08-03 18:58:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:58:31,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843453068] [2023-08-03 18:58:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843453068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898429946] [2023-08-03 18:58:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:31,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:31,559 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) [2023-08-03 18:58:31,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:58:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:31,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:58:31,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:58:31,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898429946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:31,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:31,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:58:31,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257092992] [2023-08-03 18:58:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:31,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-03 18:58:31,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:31,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:31,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-03 18:58:31,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:32,065 INFO L124 PetriNetUnfolderBase]: 3827/5736 cut-off events. [2023-08-03 18:58:32,065 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-08-03 18:58:32,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11371 conditions, 5736 events. 3827/5736 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28799 event pairs, 2404 based on Foata normal form. 0/4085 useless extension candidates. Maximal degree in co-relation 11337. Up to 5237 conditions per place. [2023-08-03 18:58:32,085 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 18:58:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 270 flow [2023-08-03 18:58:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-03 18:58:32,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-03 18:58:32,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-03 18:58:32,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-03 18:58:32,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:32,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-03 18:58:32,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,090 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 150 flow. Second operand 3 states and 418 transitions. [2023-08-03 18:58:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 270 flow [2023-08-03 18:58:32,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:58:32,092 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 160 flow [2023-08-03 18:58:32,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-03 18:58:32,092 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-03 18:58:32,092 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 160 flow [2023-08-03 18:58:32,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:32,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:58:32,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 18:58:32,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:32,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:32,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 570291441, now seen corresponding path program 1 times [2023-08-03 18:58:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062601315] [2023-08-03 18:58:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:58:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:32,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062601315] [2023-08-03 18:58:32,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062601315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:32,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753949851] [2023-08-03 18:58:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:32,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:32,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:32,357 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) [2023-08-03 18:58:32,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:58:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:32,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:58:32,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:58:32,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753949851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:32,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:32,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:58:32,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516574638] [2023-08-03 18:58:32,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:32,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:58:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:58:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:58:32,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-03 18:58:32,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:32,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-03 18:58:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:32,813 INFO L124 PetriNetUnfolderBase]: 3815/5712 cut-off events. [2023-08-03 18:58:32,813 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-08-03 18:58:32,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11352 conditions, 5712 events. 3815/5712 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28649 event pairs, 1579 based on Foata normal form. 9/4077 useless extension candidates. Maximal degree in co-relation 4785. Up to 5248 conditions per place. [2023-08-03 18:58:32,830 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 46 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-03 18:58:32,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 275 flow [2023-08-03 18:58:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:58:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:58:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2023-08-03 18:58:32,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2023-08-03 18:58:32,832 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2023-08-03 18:58:32,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2023-08-03 18:58:32,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:32,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2023-08-03 18:58:32,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,836 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 160 flow. Second operand 5 states and 660 transitions. [2023-08-03 18:58:32,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 275 flow [2023-08-03 18:58:32,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:58:32,837 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 169 flow [2023-08-03 18:58:32,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-03 18:58:32,838 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-08-03 18:58:32,838 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 169 flow [2023-08-03 18:58:32,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:32,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:32,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:32,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 18:58:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:33,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:33,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1730922160, now seen corresponding path program 1 times [2023-08-03 18:58:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784085087] [2023-08-03 18:58:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:58:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784085087] [2023-08-03 18:58:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784085087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114558656] [2023-08-03 18:58:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:33,125 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) [2023-08-03 18:58:33,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:58:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:33,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:58:33,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:58:33,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:33,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114558656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:33,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:33,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:58:33,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809209687] [2023-08-03 18:58:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:33,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:33,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:33,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-03 18:58:33,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:33,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-03 18:58:33,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:33,560 INFO L124 PetriNetUnfolderBase]: 3808/5691 cut-off events. [2023-08-03 18:58:33,560 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2023-08-03 18:58:33,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11327 conditions, 5691 events. 3808/5691 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28049 event pairs, 1549 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 6330. Up to 5192 conditions per place. [2023-08-03 18:58:33,575 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-03 18:58:33,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 299 flow [2023-08-03 18:58:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-03 18:58:33,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-03 18:58:33,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-03 18:58:33,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-03 18:58:33,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:33,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-03 18:58:33,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,579 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 169 flow. Second operand 3 states and 421 transitions. [2023-08-03 18:58:33,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 299 flow [2023-08-03 18:58:33,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:58:33,582 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 174 flow [2023-08-03 18:58:33,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-03 18:58:33,584 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2023-08-03 18:58:33,584 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 174 flow [2023-08-03 18:58:33,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:33,584 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] [2023-08-03 18:58:33,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:33,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:33,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:33,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash -37591613, now seen corresponding path program 1 times [2023-08-03 18:58:33,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239735290] [2023-08-03 18:58:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:58:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239735290] [2023-08-03 18:58:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239735290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640515262] [2023-08-03 18:58:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:33,850 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) [2023-08-03 18:58:33,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 18:58:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:33,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:58:33,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 18:58:33,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640515262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:33,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:58:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129953871] [2023-08-03 18:58:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:33,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-03 18:58:33,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:33,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:33,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-03 18:58:33,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:34,182 INFO L124 PetriNetUnfolderBase]: 2975/4538 cut-off events. [2023-08-03 18:58:34,182 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-08-03 18:58:34,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9478 conditions, 4538 events. 2975/4538 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22094 event pairs, 1293 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 5582. Up to 2935 conditions per place. [2023-08-03 18:58:34,199 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 62 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-03 18:58:34,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 352 flow [2023-08-03 18:58:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-03 18:58:34,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421383647798742 [2023-08-03 18:58:34,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-03 18:58:34,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-03 18:58:34,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:34,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-03 18:58:34,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,204 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 174 flow. Second operand 3 states and 431 transitions. [2023-08-03 18:58:34,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 352 flow [2023-08-03 18:58:34,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:58:34,206 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 186 flow [2023-08-03 18:58:34,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-03 18:58:34,207 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2023-08-03 18:58:34,207 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 186 flow [2023-08-03 18:58:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:34,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:34,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:34,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:34,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1791036514, now seen corresponding path program 1 times [2023-08-03 18:58:34,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050507963] [2023-08-03 18:58:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 18:58:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050507963] [2023-08-03 18:58:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050507963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704797482] [2023-08-03 18:58:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:34,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:34,465 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) [2023-08-03 18:58:34,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 18:58:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:34,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:58:34,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 18:58:34,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 18:58:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704797482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:34,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:58:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884842515] [2023-08-03 18:58:34,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:58:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:58:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:34,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-03 18:58:34,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:34,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-03 18:58:34,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:34,910 INFO L124 PetriNetUnfolderBase]: 2970/4570 cut-off events. [2023-08-03 18:58:34,910 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2023-08-03 18:58:34,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9931 conditions, 4570 events. 2970/4570 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22573 event pairs, 1258 based on Foata normal form. 3/3571 useless extension candidates. Maximal degree in co-relation 4158. Up to 4212 conditions per place. [2023-08-03 18:58:34,921 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 18:58:34,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 296 flow [2023-08-03 18:58:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:58:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:58:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-03 18:58:34,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066037735849057 [2023-08-03 18:58:34,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-03 18:58:34,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-03 18:58:34,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:34,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-03 18:58:34,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,942 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 186 flow. Second operand 4 states and 537 transitions. [2023-08-03 18:58:34,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 296 flow [2023-08-03 18:58:34,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:58:34,945 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 182 flow [2023-08-03 18:58:34,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-03 18:58:34,945 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2023-08-03 18:58:34,945 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 182 flow [2023-08-03 18:58:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:34,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:34,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:34,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:35,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:35,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:35,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -216507271, now seen corresponding path program 1 times [2023-08-03 18:58:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:35,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215498932] [2023-08-03 18:58:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:58:35,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215498932] [2023-08-03 18:58:35,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215498932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184967899] [2023-08-03 18:58:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:35,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:35,201 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) [2023-08-03 18:58:35,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 18:58:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:35,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:58:35,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:58:35,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:58:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184967899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:35,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:58:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121247434] [2023-08-03 18:58:35,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:35,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:58:35,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:58:35,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-03 18:58:35,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:35,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-03 18:58:35,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:35,392 INFO L124 PetriNetUnfolderBase]: 340/618 cut-off events. [2023-08-03 18:58:35,392 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-08-03 18:58:35,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 618 events. 340/618 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2081 event pairs, 179 based on Foata normal form. 6/498 useless extension candidates. Maximal degree in co-relation 1132. Up to 491 conditions per place. [2023-08-03 18:58:35,394 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 50 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-03 18:58:35,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 310 flow [2023-08-03 18:58:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:58:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:58:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-03 18:58:35,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-03 18:58:35,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-03 18:58:35,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-03 18:58:35,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:35,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-03 18:58:35,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,399 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,399 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 182 flow. Second operand 4 states and 540 transitions. [2023-08-03 18:58:35,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 310 flow [2023-08-03 18:58:35,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 304 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:58:35,400 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 182 flow [2023-08-03 18:58:35,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-03 18:58:35,401 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2023-08-03 18:58:35,401 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 182 flow [2023-08-03 18:58:35,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:35,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:35,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 18:58:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:35,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:35,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash -263137694, now seen corresponding path program 1 times [2023-08-03 18:58:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:35,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610698611] [2023-08-03 18:58:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:58:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610698611] [2023-08-03 18:58:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610698611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235524686] [2023-08-03 18:58:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:35,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:35,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:35,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 18:58:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:35,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:58:35,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:58:35,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:35,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235524686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:35,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:35,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:58:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846709489] [2023-08-03 18:58:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:58:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:58:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:58:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-03 18:58:35,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:35,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-03 18:58:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:35,867 INFO L124 PetriNetUnfolderBase]: 300/539 cut-off events. [2023-08-03 18:58:35,867 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-03 18:58:35,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 539 events. 300/539 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1619 event pairs, 60 based on Foata normal form. 16/446 useless extension candidates. Maximal degree in co-relation 1008. Up to 312 conditions per place. [2023-08-03 18:58:35,869 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 55 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-03 18:58:35,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 332 flow [2023-08-03 18:58:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:58:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:58:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-08-03 18:58:35,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033962264150943 [2023-08-03 18:58:35,871 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-08-03 18:58:35,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-08-03 18:58:35,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:35,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-08-03 18:58:35,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,874 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,875 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 182 flow. Second operand 5 states and 667 transitions. [2023-08-03 18:58:35,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 332 flow [2023-08-03 18:58:35,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 322 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-03 18:58:35,877 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 189 flow [2023-08-03 18:58:35,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-03 18:58:35,878 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 13 predicate places. [2023-08-03 18:58:35,878 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 189 flow [2023-08-03 18:58:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:35,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:36,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:36,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:36,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1906276974, now seen corresponding path program 1 times [2023-08-03 18:58:36,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:36,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657899860] [2023-08-03 18:58:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:36,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:58:36,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657899860] [2023-08-03 18:58:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657899860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:36,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:58:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 18:58:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905988605] [2023-08-03 18:58:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:58:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:58:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:58:36,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 265 [2023-08-03 18:58:36,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:36,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 265 [2023-08-03 18:58:36,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:36,270 INFO L124 PetriNetUnfolderBase]: 483/907 cut-off events. [2023-08-03 18:58:36,271 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2023-08-03 18:58:36,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 907 events. 483/907 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3706 event pairs, 281 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 1074. Up to 440 conditions per place. [2023-08-03 18:58:36,274 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 80 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-03 18:58:36,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 530 flow [2023-08-03 18:58:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:58:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:58:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-03 18:58:36,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254716981132076 [2023-08-03 18:58:36,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-03 18:58:36,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-03 18:58:36,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:36,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-03 18:58:36,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,278 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 189 flow. Second operand 4 states and 557 transitions. [2023-08-03 18:58:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 530 flow [2023-08-03 18:58:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 516 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-03 18:58:36,280 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 200 flow [2023-08-03 18:58:36,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-08-03 18:58:36,281 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-03 18:58:36,281 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 200 flow [2023-08-03 18:58:36,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:36,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:36,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:58:36,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:36,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash -170009676, now seen corresponding path program 2 times [2023-08-03 18:58:36,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:36,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143446402] [2023-08-03 18:58:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:36,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 18:58:36,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:36,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143446402] [2023-08-03 18:58:36,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143446402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:36,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048169908] [2023-08-03 18:58:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 18:58:36,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:36,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 18:58:36,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 18:58:36,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 18:58:36,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 18:58:36,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:58:36,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:58:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048169908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:58:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:58:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 18:58:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864236749] [2023-08-03 18:58:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:58:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:58:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:58:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:36,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 265 [2023-08-03 18:58:36,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:36,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 265 [2023-08-03 18:58:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:36,552 INFO L124 PetriNetUnfolderBase]: 484/920 cut-off events. [2023-08-03 18:58:36,552 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2023-08-03 18:58:36,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 920 events. 484/920 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3786 event pairs, 325 based on Foata normal form. 9/819 useless extension candidates. Maximal degree in co-relation 1158. Up to 836 conditions per place. [2023-08-03 18:58:36,554 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 43 selfloop transitions, 0 changer transitions 11/60 dead transitions. [2023-08-03 18:58:36,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 332 flow [2023-08-03 18:58:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:58:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:58:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-03 18:58:36,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-03 18:58:36,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-03 18:58:36,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-03 18:58:36,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:36,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-03 18:58:36,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,558 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 200 flow. Second operand 3 states and 421 transitions. [2023-08-03 18:58:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 332 flow [2023-08-03 18:58:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:58:36,561 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 192 flow [2023-08-03 18:58:36,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-03 18:58:36,562 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2023-08-03 18:58:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 192 flow [2023-08-03 18:58:36,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:36,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:36,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:36,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 18:58:36,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:36,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1138606417, now seen corresponding path program 1 times [2023-08-03 18:58:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834881308] [2023-08-03 18:58:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 18:58:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834881308] [2023-08-03 18:58:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834881308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748507155] [2023-08-03 18:58:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:36,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:36,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 18:58:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:36,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:58:36,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:58:36,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:58:36,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748507155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:36,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:36,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-03 18:58:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514731495] [2023-08-03 18:58:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 18:58:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 18:58:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:58:36,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 265 [2023-08-03 18:58:36,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:36,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:36,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 265 [2023-08-03 18:58:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:37,148 INFO L124 PetriNetUnfolderBase]: 407/797 cut-off events. [2023-08-03 18:58:37,148 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2023-08-03 18:58:37,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 797 events. 407/797 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3178 event pairs, 11 based on Foata normal form. 55/757 useless extension candidates. Maximal degree in co-relation 1977. Up to 299 conditions per place. [2023-08-03 18:58:37,151 INFO L140 encePairwiseOnDemand]: 257/265 looper letters, 101 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2023-08-03 18:58:37,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 117 transitions, 648 flow [2023-08-03 18:58:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 18:58:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 18:58:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1030 transitions. [2023-08-03 18:58:37,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2023-08-03 18:58:37,153 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1030 transitions. [2023-08-03 18:58:37,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1030 transitions. [2023-08-03 18:58:37,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:37,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1030 transitions. [2023-08-03 18:58:37,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.75) internal successors, (1030), 8 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,158 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,158 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 192 flow. Second operand 8 states and 1030 transitions. [2023-08-03 18:58:37,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 117 transitions, 648 flow [2023-08-03 18:58:37,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 644 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 18:58:37,160 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 225 flow [2023-08-03 18:58:37,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=225, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2023-08-03 18:58:37,161 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 22 predicate places. [2023-08-03 18:58:37,161 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 225 flow [2023-08-03 18:58:37,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:37,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:37,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 18:58:37,366 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:37,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -824488800, now seen corresponding path program 1 times [2023-08-03 18:58:37,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:37,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865451994] [2023-08-03 18:58:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 18:58:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865451994] [2023-08-03 18:58:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865451994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014330400] [2023-08-03 18:58:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:37,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:37,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:37,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:37,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 18:58:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:37,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:58:37,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 18:58:37,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 18:58:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014330400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:37,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:37,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:58:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166881256] [2023-08-03 18:58:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:58:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:58:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:58:37,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-03 18:58:37,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:37,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-03 18:58:37,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:37,637 INFO L124 PetriNetUnfolderBase]: 359/718 cut-off events. [2023-08-03 18:58:37,637 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2023-08-03 18:58:37,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 718 events. 359/718 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2803 event pairs, 143 based on Foata normal form. 16/650 useless extension candidates. Maximal degree in co-relation 1869. Up to 361 conditions per place. [2023-08-03 18:58:37,639 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-03 18:58:37,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 397 flow [2023-08-03 18:58:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:58:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:58:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-03 18:58:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-08-03 18:58:37,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-03 18:58:37,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-03 18:58:37,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:37,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-03 18:58:37,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,643 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 225 flow. Second operand 4 states and 545 transitions. [2023-08-03 18:58:37,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 397 flow [2023-08-03 18:58:37,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 386 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:58:37,645 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 228 flow [2023-08-03 18:58:37,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-08-03 18:58:37,646 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2023-08-03 18:58:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 228 flow [2023-08-03 18:58:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:37,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-03 18:58:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 18:58:37,852 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:37,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash -97173258, now seen corresponding path program 1 times [2023-08-03 18:58:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986083891] [2023-08-03 18:58:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:58:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986083891] [2023-08-03 18:58:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986083891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30397430] [2023-08-03 18:58:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:38,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:38,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 18:58:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:38,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-03 18:58:38,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:38,435 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-03 18:58:38,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-03 18:58:38,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:38,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:38,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:38,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:58:38,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:58:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30397430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:38,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-03 18:58:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056246885] [2023-08-03 18:58:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 18:58:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 18:58:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=158, Unknown=1, NotChecked=0, Total=210 [2023-08-03 18:58:38,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 265 [2023-08-03 18:58:38,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 228 flow. Second operand has 15 states, 15 states have (on average 100.46666666666667) internal successors, (1507), 15 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:38,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:38,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 265 [2023-08-03 18:58:38,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:41,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 18:58:41,912 INFO L124 PetriNetUnfolderBase]: 1823/2884 cut-off events. [2023-08-03 18:58:41,912 INFO L125 PetriNetUnfolderBase]: For 3270/3270 co-relation queries the response was YES. [2023-08-03 18:58:41,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7854 conditions, 2884 events. 1823/2884 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13911 event pairs, 247 based on Foata normal form. 0/2460 useless extension candidates. Maximal degree in co-relation 7835. Up to 679 conditions per place. [2023-08-03 18:58:41,925 INFO L140 encePairwiseOnDemand]: 257/265 looper letters, 228 selfloop transitions, 60 changer transitions 0/292 dead transitions. [2023-08-03 18:58:41,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 292 transitions, 1901 flow [2023-08-03 18:58:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-03 18:58:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-03 18:58:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2430 transitions. [2023-08-03 18:58:41,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39868744872846595 [2023-08-03 18:58:41,930 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2430 transitions. [2023-08-03 18:58:41,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2430 transitions. [2023-08-03 18:58:41,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:41,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2430 transitions. [2023-08-03 18:58:41,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.65217391304348) internal successors, (2430), 23 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:41,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 265.0) internal successors, (6360), 24 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:41,941 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 265.0) internal successors, (6360), 24 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:41,941 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 228 flow. Second operand 23 states and 2430 transitions. [2023-08-03 18:58:41,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 292 transitions, 1901 flow [2023-08-03 18:58:41,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 292 transitions, 1850 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:58:41,949 INFO L231 Difference]: Finished difference. Result has 103 places, 110 transitions, 568 flow [2023-08-03 18:58:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=568, PETRI_PLACES=103, PETRI_TRANSITIONS=110} [2023-08-03 18:58:41,949 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 55 predicate places. [2023-08-03 18:58:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 110 transitions, 568 flow [2023-08-03 18:58:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 100.46666666666667) internal successors, (1507), 15 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:41,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:41,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:41,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 18:58:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 18:58:42,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:42,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash -50855232, now seen corresponding path program 2 times [2023-08-03 18:58:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:42,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812215142] [2023-08-03 18:58:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:58:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812215142] [2023-08-03 18:58:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812215142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047213250] [2023-08-03 18:58:42,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 18:58:42,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:42,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:42,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 18:58:42,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 18:58:42,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 18:58:42,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-03 18:58:42,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:42,888 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-03 18:58:42,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-03 18:58:42,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:42,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:42,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:42,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:58:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:58:43,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:58:43,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047213250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:43,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:43,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2023-08-03 18:58:43,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128105125] [2023-08-03 18:58:43,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 18:58:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:43,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 18:58:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-03 18:58:43,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-03 18:58:43,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 568 flow. Second operand has 20 states, 20 states have (on average 102.2) internal successors, (2044), 20 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:43,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-03 18:58:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:58:46,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 18:58:48,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 18:58:50,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 18:58:50,988 INFO L124 PetriNetUnfolderBase]: 2714/4339 cut-off events. [2023-08-03 18:58:50,989 INFO L125 PetriNetUnfolderBase]: For 15110/15156 co-relation queries the response was YES. [2023-08-03 18:58:50,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16878 conditions, 4339 events. 2714/4339 cut-off events. For 15110/15156 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23435 event pairs, 178 based on Foata normal form. 236/4470 useless extension candidates. Maximal degree in co-relation 16848. Up to 915 conditions per place. [2023-08-03 18:58:51,012 INFO L140 encePairwiseOnDemand]: 254/265 looper letters, 240 selfloop transitions, 183 changer transitions 0/439 dead transitions. [2023-08-03 18:58:51,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 439 transitions, 3327 flow [2023-08-03 18:58:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-03 18:58:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-03 18:58:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3064 transitions. [2023-08-03 18:58:51,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39869876382563435 [2023-08-03 18:58:51,019 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3064 transitions. [2023-08-03 18:58:51,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3064 transitions. [2023-08-03 18:58:51,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:58:51,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3064 transitions. [2023-08-03 18:58:51,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.65517241379311) internal successors, (3064), 29 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:51,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 265.0) internal successors, (7950), 30 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:51,030 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 265.0) internal successors, (7950), 30 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:51,031 INFO L175 Difference]: Start difference. First operand has 103 places, 110 transitions, 568 flow. Second operand 29 states and 3064 transitions. [2023-08-03 18:58:51,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 439 transitions, 3327 flow [2023-08-03 18:58:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 439 transitions, 3327 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:58:51,058 INFO L231 Difference]: Finished difference. Result has 135 places, 256 transitions, 1872 flow [2023-08-03 18:58:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1872, PETRI_PLACES=135, PETRI_TRANSITIONS=256} [2023-08-03 18:58:51,058 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 87 predicate places. [2023-08-03 18:58:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 256 transitions, 1872 flow [2023-08-03 18:58:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 102.2) internal successors, (2044), 20 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:58:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:58:51,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 18:58:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 18:58:51,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:58:51,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:58:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1871168538, now seen corresponding path program 1 times [2023-08-03 18:58:51,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:58:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574016381] [2023-08-03 18:58:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:58:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:58:51,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:58:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574016381] [2023-08-03 18:58:51,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574016381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:58:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049155639] [2023-08-03 18:58:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:58:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:58:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:58:51,778 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:58:51,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 18:58:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:58:51,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-03 18:58:51,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:58:52,021 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-03 18:58:52,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-08-03 18:58:52,060 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 18:58:52,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-03 18:58:52,117 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 18:58:52,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-08-03 18:58:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:58:52,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:58:52,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 18:58:52,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 103 [2023-08-03 18:58:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:58:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049155639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:58:52,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:58:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-03 18:58:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43983320] [2023-08-03 18:58:52,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:58:52,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-03 18:58:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:58:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-03 18:58:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-08-03 18:58:54,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 265 [2023-08-03 18:58:54,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 256 transitions, 1872 flow. Second operand has 24 states, 24 states have (on average 100.08333333333333) internal successors, (2402), 24 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:58:54,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:58:54,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 265 [2023-08-03 18:58:54,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:59:00,546 INFO L124 PetriNetUnfolderBase]: 6195/9450 cut-off events. [2023-08-03 18:59:00,547 INFO L125 PetriNetUnfolderBase]: For 46835/46835 co-relation queries the response was YES. [2023-08-03 18:59:00,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46306 conditions, 9450 events. 6195/9450 cut-off events. For 46835/46835 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 54979 event pairs, 462 based on Foata normal form. 270/9703 useless extension candidates. Maximal degree in co-relation 46271. Up to 1452 conditions per place. [2023-08-03 18:59:00,608 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 724 selfloop transitions, 688 changer transitions 0/1416 dead transitions. [2023-08-03 18:59:00,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1416 transitions, 13296 flow [2023-08-03 18:59:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-03 18:59:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-03 18:59:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 10114 transitions. [2023-08-03 18:59:00,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934643065551449 [2023-08-03 18:59:00,619 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 10114 transitions. [2023-08-03 18:59:00,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 10114 transitions. [2023-08-03 18:59:00,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:59:00,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 10114 transitions. [2023-08-03 18:59:00,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 104.26804123711341) internal successors, (10114), 97 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:00,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:00,664 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:00,664 INFO L175 Difference]: Start difference. First operand has 135 places, 256 transitions, 1872 flow. Second operand 97 states and 10114 transitions. [2023-08-03 18:59:00,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1416 transitions, 13296 flow [2023-08-03 18:59:00,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1416 transitions, 12353 flow, removed 461 selfloop flow, removed 2 redundant places. [2023-08-03 18:59:00,917 INFO L231 Difference]: Finished difference. Result has 281 places, 862 transitions, 8728 flow [2023-08-03 18:59:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=8728, PETRI_PLACES=281, PETRI_TRANSITIONS=862} [2023-08-03 18:59:00,917 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 233 predicate places. [2023-08-03 18:59:00,917 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 862 transitions, 8728 flow [2023-08-03 18:59:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.08333333333333) internal successors, (2402), 24 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:00,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:59:00,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:59:00,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 18:59:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 18:59:01,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:59:01,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:59:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2002152756, now seen corresponding path program 2 times [2023-08-03 18:59:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:59:01,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102770312] [2023-08-03 18:59:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:59:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:59:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:59:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:59:01,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:59:01,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102770312] [2023-08-03 18:59:01,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102770312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:59:01,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402939164] [2023-08-03 18:59:01,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 18:59:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:59:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:59:01,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:59:01,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 18:59:01,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 18:59:01,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 18:59:01,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-03 18:59:01,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:59:01,565 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-03 18:59:01,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-03 18:59:01,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,671 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-03 18:59:01,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 18:59:01,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 18:59:01,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:59:01,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:59:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:59:02,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402939164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:59:02,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:59:02,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 26 [2023-08-03 18:59:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522896926] [2023-08-03 18:59:02,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:59:02,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-03 18:59:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:59:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-03 18:59:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2023-08-03 18:59:02,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 265 [2023-08-03 18:59:02,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 862 transitions, 8728 flow. Second operand has 27 states, 27 states have (on average 73.37037037037037) internal successors, (1981), 27 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:02,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:59:02,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 265 [2023-08-03 18:59:02,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:59:08,645 INFO L124 PetriNetUnfolderBase]: 10139/15120 cut-off events. [2023-08-03 18:59:08,645 INFO L125 PetriNetUnfolderBase]: For 143124/143124 co-relation queries the response was YES. [2023-08-03 18:59:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95575 conditions, 15120 events. 10139/15120 cut-off events. For 143124/143124 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 91210 event pairs, 737 based on Foata normal form. 242/15358 useless extension candidates. Maximal degree in co-relation 95488. Up to 3409 conditions per place. [2023-08-03 18:59:08,791 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 979 selfloop transitions, 993 changer transitions 0/1976 dead transitions. [2023-08-03 18:59:08,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1976 transitions, 24278 flow [2023-08-03 18:59:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-03 18:59:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-03 18:59:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4719 transitions. [2023-08-03 18:59:08,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29192700278379213 [2023-08-03 18:59:08,799 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4719 transitions. [2023-08-03 18:59:08,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4719 transitions. [2023-08-03 18:59:08,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:59:08,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4719 transitions. [2023-08-03 18:59:08,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 77.36065573770492) internal successors, (4719), 61 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:08,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 265.0) internal successors, (16430), 62 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:08,821 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 265.0) internal successors, (16430), 62 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:08,821 INFO L175 Difference]: Start difference. First operand has 281 places, 862 transitions, 8728 flow. Second operand 61 states and 4719 transitions. [2023-08-03 18:59:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1976 transitions, 24278 flow [2023-08-03 18:59:10,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1976 transitions, 23513 flow, removed 345 selfloop flow, removed 7 redundant places. [2023-08-03 18:59:10,860 INFO L231 Difference]: Finished difference. Result has 360 places, 1421 transitions, 17180 flow [2023-08-03 18:59:10,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=8212, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=17180, PETRI_PLACES=360, PETRI_TRANSITIONS=1421} [2023-08-03 18:59:10,861 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 312 predicate places. [2023-08-03 18:59:10,861 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1421 transitions, 17180 flow [2023-08-03 18:59:10,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 73.37037037037037) internal successors, (1981), 27 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:10,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:59:10,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:59:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-03 18:59:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:59:11,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:59:11,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:59:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -571703509, now seen corresponding path program 1 times [2023-08-03 18:59:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:59:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773152095] [2023-08-03 18:59:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:59:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:59:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:59:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:59:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:59:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773152095] [2023-08-03 18:59:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773152095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:59:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479666474] [2023-08-03 18:59:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:59:11,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:59:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:59:11,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:59:11,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 18:59:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:59:11,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-03 18:59:11,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:59:11,715 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-03 18:59:11,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-08-03 18:59:11,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:11,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:11,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:11,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 18:59:12,041 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-03 18:59:12,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 18:59:12,192 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-03 18:59:12,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-03 18:59:12,248 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 18:59:12,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-03 18:59:12,348 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 18:59:12,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-03 18:59:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 18:59:12,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:59:13,012 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_565 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_565))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) c_~v~0.offset (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 18:59:13,030 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_565 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_565))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 18:59:13,042 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_565 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_565))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) 0 (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 18:59:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 14 not checked. [2023-08-03 18:59:13,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479666474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:59:13,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:59:13,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 37 [2023-08-03 18:59:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299468338] [2023-08-03 18:59:13,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:59:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-03 18:59:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:59:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-03 18:59:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1056, Unknown=3, NotChecked=204, Total=1406 [2023-08-03 18:59:13,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 265 [2023-08-03 18:59:13,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1421 transitions, 17180 flow. Second operand has 38 states, 38 states have (on average 71.44736842105263) internal successors, (2715), 38 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:59:13,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:59:13,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 265 [2023-08-03 18:59:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:00:13,522 INFO L124 PetriNetUnfolderBase]: 17593/26304 cut-off events. [2023-08-03 19:00:13,522 INFO L125 PetriNetUnfolderBase]: For 363764/363764 co-relation queries the response was YES. [2023-08-03 19:00:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193409 conditions, 26304 events. 17593/26304 cut-off events. For 363764/363764 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 173353 event pairs, 1496 based on Foata normal form. 150/26444 useless extension candidates. Maximal degree in co-relation 193298. Up to 14796 conditions per place. [2023-08-03 19:00:14,294 INFO L140 encePairwiseOnDemand]: 243/265 looper letters, 2107 selfloop transitions, 1255 changer transitions 49/3415 dead transitions. [2023-08-03 19:00:14,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 3415 transitions, 47435 flow [2023-08-03 19:00:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-08-03 19:00:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-08-03 19:00:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 8471 transitions. [2023-08-03 19:00:14,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2879823219445861 [2023-08-03 19:00:14,301 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 8471 transitions. [2023-08-03 19:00:14,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 8471 transitions. [2023-08-03 19:00:14,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:00:14,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 8471 transitions. [2023-08-03 19:00:14,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 76.31531531531532) internal successors, (8471), 111 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:14,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 265.0) internal successors, (29680), 112 states have internal predecessors, (29680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:14,331 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 265.0) internal successors, (29680), 112 states have internal predecessors, (29680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:14,332 INFO L175 Difference]: Start difference. First operand has 360 places, 1421 transitions, 17180 flow. Second operand 111 states and 8471 transitions. [2023-08-03 19:00:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 3415 transitions, 47435 flow [2023-08-03 19:00:25,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 3415 transitions, 46028 flow, removed 358 selfloop flow, removed 12 redundant places. [2023-08-03 19:00:25,234 INFO L231 Difference]: Finished difference. Result has 526 places, 2534 transitions, 36755 flow [2023-08-03 19:00:25,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=16588, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=36755, PETRI_PLACES=526, PETRI_TRANSITIONS=2534} [2023-08-03 19:00:25,235 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 478 predicate places. [2023-08-03 19:00:25,235 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2534 transitions, 36755 flow [2023-08-03 19:00:25,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 71.44736842105263) internal successors, (2715), 38 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:25,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:00:25,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:00:25,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 19:00:25,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:00:25,441 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:00:25,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:00:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1544594753, now seen corresponding path program 2 times [2023-08-03 19:00:25,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:00:25,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435942155] [2023-08-03 19:00:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:00:25,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:00:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:00:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:00:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:00:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435942155] [2023-08-03 19:00:25,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435942155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:00:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007940060] [2023-08-03 19:00:25,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:00:25,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:00:25,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:00:25,937 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:00:25,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 19:00:26,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:00:26,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:00:26,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-03 19:00:26,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:00:26,077 INFO L322 Elim1Store]: treesize reduction 53, result has 32.9 percent of original size [2023-08-03 19:00:26,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2023-08-03 19:00:26,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,162 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-03 19:00:26,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-03 19:00:26,196 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 19:00:26,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 19:00:26,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:00:26,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-03 19:00:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:00:26,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:00:26,504 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_633 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_633) |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.offset| |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1|)))) is different from false [2023-08-03 19:00:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:00:26,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007940060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:00:26,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:00:26,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 31 [2023-08-03 19:00:26,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567259069] [2023-08-03 19:00:26,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:00:26,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-03 19:00:26,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:00:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-03 19:00:26,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=818, Unknown=13, NotChecked=58, Total=992 [2023-08-03 19:00:27,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 265 [2023-08-03 19:00:27,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2534 transitions, 36755 flow. Second operand has 32 states, 32 states have (on average 76.625) internal successors, (2452), 32 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:27,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:00:27,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 265 [2023-08-03 19:00:27,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:00:41,009 INFO L124 PetriNetUnfolderBase]: 20241/30144 cut-off events. [2023-08-03 19:00:41,009 INFO L125 PetriNetUnfolderBase]: For 677286/677288 co-relation queries the response was YES. [2023-08-03 19:00:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249747 conditions, 30144 events. 20241/30144 cut-off events. For 677286/677288 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 202694 event pairs, 2305 based on Foata normal form. 314/30439 useless extension candidates. Maximal degree in co-relation 249573. Up to 21331 conditions per place. [2023-08-03 19:00:41,582 INFO L140 encePairwiseOnDemand]: 249/265 looper letters, 2435 selfloop transitions, 849 changer transitions 0/3288 dead transitions. [2023-08-03 19:00:41,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 3288 transitions, 53295 flow [2023-08-03 19:00:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-03 19:00:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-03 19:00:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1861 transitions. [2023-08-03 19:00:41,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3192109777015437 [2023-08-03 19:00:41,584 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1861 transitions. [2023-08-03 19:00:41,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1861 transitions. [2023-08-03 19:00:41,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:00:41,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1861 transitions. [2023-08-03 19:00:41,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.5909090909091) internal successors, (1861), 22 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:41,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 265.0) internal successors, (6095), 23 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:41,589 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 265.0) internal successors, (6095), 23 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:00:41,589 INFO L175 Difference]: Start difference. First operand has 526 places, 2534 transitions, 36755 flow. Second operand 22 states and 1861 transitions. [2023-08-03 19:00:41,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 3288 transitions, 53295 flow [2023-08-03 19:01:05,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 3288 transitions, 51345 flow, removed 873 selfloop flow, removed 26 redundant places. [2023-08-03 19:01:05,338 INFO L231 Difference]: Finished difference. Result has 525 places, 2859 transitions, 43275 flow [2023-08-03 19:01:05,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=34756, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=43275, PETRI_PLACES=525, PETRI_TRANSITIONS=2859} [2023-08-03 19:01:05,340 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 477 predicate places. [2023-08-03 19:01:05,341 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2859 transitions, 43275 flow [2023-08-03 19:01:05,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.625) internal successors, (2452), 32 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:05,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:05,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:05,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-03 19:01:05,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:05,546 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:05,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1282102320, now seen corresponding path program 1 times [2023-08-03 19:01:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:05,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612697558] [2023-08-03 19:01:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:05,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:01:05,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:05,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612697558] [2023-08-03 19:01:05,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612697558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:05,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939377659] [2023-08-03 19:01:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:05,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:05,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:05,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-03 19:01:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:06,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-03 19:01:06,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:06,071 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-03 19:01:06,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-03 19:01:06,124 INFO L322 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-08-03 19:01:06,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 33 [2023-08-03 19:01:06,154 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 19:01:06,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-03 19:01:06,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-03 19:01:06,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-03 19:01:06,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-03 19:01:06,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-08-03 19:01:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:01:06,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:06,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 19:01:06,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-08-03 19:01:06,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-08-03 19:01:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:01:06,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939377659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:06,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:06,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2023-08-03 19:01:06,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345895554] [2023-08-03 19:01:06,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-03 19:01:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-03 19:01:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=525, Unknown=10, NotChecked=0, Total=600 [2023-08-03 19:01:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 265 [2023-08-03 19:01:07,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2859 transitions, 43275 flow. Second operand has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 265 [2023-08-03 19:01:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:08,906 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_690 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_690) |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.offset| |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1|)) 0))) (= |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~mem19#1| 0)) (or (= (select |c_#valid| 3) 1) (< |c_#StackHeapBarrier| 3))) is different from false [2023-08-03 19:01:11,233 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_690 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_690) |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.offset| |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1|)) 0))) (= |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~mem19#1| 0)) (not (= |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_#t~mem19#1| 0)) (or (= (select |c_#valid| 3) 1) (< |c_#StackHeapBarrier| 3))) is different from false [2023-08-03 19:01:24,393 INFO L124 PetriNetUnfolderBase]: 20893/31261 cut-off events. [2023-08-03 19:01:24,393 INFO L125 PetriNetUnfolderBase]: For 693913/693915 co-relation queries the response was YES. [2023-08-03 19:01:24,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267901 conditions, 31261 events. 20893/31261 cut-off events. For 693913/693915 co-relation queries the response was YES. Maximal size of possible extension queue 1481. Compared 214236 event pairs, 1378 based on Foata normal form. 171/31420 useless extension candidates. Maximal degree in co-relation 267736. Up to 11097 conditions per place. [2023-08-03 19:01:24,978 INFO L140 encePairwiseOnDemand]: 246/265 looper letters, 2003 selfloop transitions, 1468 changer transitions 0/3475 dead transitions. [2023-08-03 19:01:24,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 3475 transitions, 57542 flow [2023-08-03 19:01:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-03 19:01:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-03 19:01:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3644 transitions. [2023-08-03 19:01:24,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31978938130759105 [2023-08-03 19:01:24,981 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3644 transitions. [2023-08-03 19:01:24,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3644 transitions. [2023-08-03 19:01:24,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:24,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3644 transitions. [2023-08-03 19:01:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 84.74418604651163) internal successors, (3644), 43 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 265.0) internal successors, (11660), 44 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,992 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 265.0) internal successors, (11660), 44 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,992 INFO L175 Difference]: Start difference. First operand has 525 places, 2859 transitions, 43275 flow. Second operand 43 states and 3644 transitions. [2023-08-03 19:01:24,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 3475 transitions, 57542 flow [2023-08-03 19:01:56,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 3475 transitions, 56419 flow, removed 540 selfloop flow, removed 5 redundant places. [2023-08-03 19:01:56,279 INFO L231 Difference]: Finished difference. Result has 581 places, 3022 transitions, 48267 flow [2023-08-03 19:01:56,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=42207, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=48267, PETRI_PLACES=581, PETRI_TRANSITIONS=3022} [2023-08-03 19:01:56,280 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 533 predicate places. [2023-08-03 19:01:56,280 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3022 transitions, 48267 flow [2023-08-03 19:01:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:56,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:56,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:56,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-03 19:01:56,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:56,485 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:56,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1352452883, now seen corresponding path program 3 times [2023-08-03 19:01:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:56,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532026018] [2023-08-03 19:01:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:01:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532026018] [2023-08-03 19:01:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532026018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752215450] [2023-08-03 19:01:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:01:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:56,883 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:56,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-03 19:01:57,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-03 19:01:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:01:57,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-03 19:01:57,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:57,030 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-03 19:01:57,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-03 19:01:57,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:01:57,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:01:57,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:01:57,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:01:57,287 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-03 19:01:57,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 19:01:57,421 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-03 19:01:57,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-03 19:01:57,486 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 19:01:57,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-03 19:01:57,622 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-03 19:01:57,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-08-03 19:01:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:01:57,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:58,273 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (~v~0.base Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_746))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) c_~v~0.offset (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 19:01:58,293 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (~v~0.base Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_746))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 19:01:58,303 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (~v~0.base Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_746))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) 0 (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-03 19:01:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 14 not checked. [2023-08-03 19:01:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752215450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:58,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 37 [2023-08-03 19:01:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117334293] [2023-08-03 19:01:58,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:58,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-03 19:01:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-03 19:01:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1031, Unknown=21, NotChecked=204, Total=1406 [2023-08-03 19:01:58,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 265 [2023-08-03 19:01:58,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3022 transitions, 48267 flow. Second operand has 38 states, 38 states have (on average 71.57894736842105) internal successors, (2720), 38 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:58,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:58,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 265 [2023-08-03 19:01:58,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:02:38,685 INFO L124 PetriNetUnfolderBase]: 25100/37623 cut-off events. [2023-08-03 19:02:38,685 INFO L125 PetriNetUnfolderBase]: For 646777/646785 co-relation queries the response was YES. [2023-08-03 19:02:40,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335689 conditions, 37623 events. 25100/37623 cut-off events. For 646777/646785 co-relation queries the response was YES. Maximal size of possible extension queue 1787. Compared 264841 event pairs, 2982 based on Foata normal form. 305/37918 useless extension candidates. Maximal degree in co-relation 335506. Up to 29968 conditions per place. [2023-08-03 19:02:40,340 INFO L140 encePairwiseOnDemand]: 244/265 looper letters, 3470 selfloop transitions, 730 changer transitions 33/4237 dead transitions. [2023-08-03 19:02:40,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 4237 transitions, 75809 flow [2023-08-03 19:02:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-03 19:02:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-03 19:02:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5219 transitions. [2023-08-03 19:02:40,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28962264150943395 [2023-08-03 19:02:40,351 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5219 transitions. [2023-08-03 19:02:40,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5219 transitions. [2023-08-03 19:02:40,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:02:40,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5219 transitions. [2023-08-03 19:02:40,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 76.75) internal successors, (5219), 68 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:02:40,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 265.0) internal successors, (18285), 69 states have internal predecessors, (18285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:02:40,394 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 265.0) internal successors, (18285), 69 states have internal predecessors, (18285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:02:40,395 INFO L175 Difference]: Start difference. First operand has 581 places, 3022 transitions, 48267 flow. Second operand 68 states and 5219 transitions. [2023-08-03 19:02:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 4237 transitions, 75809 flow [2023-08-03 19:03:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 4237 transitions, 74160 flow, removed 668 selfloop flow, removed 13 redundant places. [2023-08-03 19:03:17,449 INFO L231 Difference]: Finished difference. Result has 667 places, 3609 transitions, 60590 flow [2023-08-03 19:03:17,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=47372, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=60590, PETRI_PLACES=667, PETRI_TRANSITIONS=3609} [2023-08-03 19:03:17,450 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 619 predicate places. [2023-08-03 19:03:17,451 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 3609 transitions, 60590 flow [2023-08-03 19:03:17,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 71.57894736842105) internal successors, (2720), 38 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:03:17,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:03:17,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:03:17,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-03 19:03:17,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:03:17,656 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:03:17,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:03:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash 619308585, now seen corresponding path program 4 times [2023-08-03 19:03:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:03:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069177478] [2023-08-03 19:03:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:03:17,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:03:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:03:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:03:18,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:03:18,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069177478] [2023-08-03 19:03:18,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069177478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:03:18,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069802356] [2023-08-03 19:03:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 19:03:18,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:03:18,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:03:18,145 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:03:18,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-03 19:03:18,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 19:03:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:03:18,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-03 19:03:18,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:03:18,292 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-03 19:03:18,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-03 19:03:18,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:03:18,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:03:18,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:03:18,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:03:18,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 19:03:18,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 19:03:18,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 19:03:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 19:03:18,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:03:18,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1654 treesize of output 1622 [2023-08-03 19:03:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:03:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069802356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:03:19,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:03:19,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 32 [2023-08-03 19:03:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140217939] [2023-08-03 19:03:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:03:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-03 19:03:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:03:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-03 19:03:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2023-08-03 19:03:22,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 265 [2023-08-03 19:03:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 3609 transitions, 60590 flow. Second operand has 33 states, 33 states have (on average 97.6969696969697) internal successors, (3224), 33 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:03:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:03:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 265 [2023-08-03 19:03:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:03:56,675 INFO L124 PetriNetUnfolderBase]: 30615/45748 cut-off events. [2023-08-03 19:03:56,676 INFO L125 PetriNetUnfolderBase]: For 721886/721896 co-relation queries the response was YES. [2023-08-03 19:03:59,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413137 conditions, 45748 events. 30615/45748 cut-off events. For 721886/721896 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 329904 event pairs, 3046 based on Foata normal form. 376/46112 useless extension candidates. Maximal degree in co-relation 412926. Up to 30044 conditions per place. [2023-08-03 19:03:59,880 INFO L140 encePairwiseOnDemand]: 251/265 looper letters, 3765 selfloop transitions, 1368 changer transitions 35/5172 dead transitions. [2023-08-03 19:03:59,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 5172 transitions, 97959 flow [2023-08-03 19:03:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-03 19:03:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-03 19:03:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7059 transitions. [2023-08-03 19:03:59,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38605414273995076 [2023-08-03 19:03:59,900 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7059 transitions. [2023-08-03 19:03:59,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7059 transitions. [2023-08-03 19:03:59,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:03:59,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7059 transitions. [2023-08-03 19:03:59,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 102.30434782608695) internal successors, (7059), 69 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:03:59,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 265.0) internal successors, (18550), 70 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:03:59,915 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 265.0) internal successors, (18550), 70 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:03:59,915 INFO L175 Difference]: Start difference. First operand has 667 places, 3609 transitions, 60590 flow. Second operand 69 states and 7059 transitions. [2023-08-03 19:03:59,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 5172 transitions, 97959 flow [2023-08-03 19:04:53,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 5172 transitions, 95450 flow, removed 1147 selfloop flow, removed 18 redundant places. [2023-08-03 19:04:53,509 INFO L231 Difference]: Finished difference. Result has 745 places, 4350 transitions, 78505 flow [2023-08-03 19:04:53,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=58018, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=78505, PETRI_PLACES=745, PETRI_TRANSITIONS=4350} [2023-08-03 19:04:53,512 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 697 predicate places. [2023-08-03 19:04:53,512 INFO L495 AbstractCegarLoop]: Abstraction has has 745 places, 4350 transitions, 78505 flow [2023-08-03 19:04:53,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.6969696969697) internal successors, (3224), 33 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:04:53,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:04:53,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:04:53,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-03 19:04:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:04:53,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:04:53,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:04:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 510278224, now seen corresponding path program 3 times [2023-08-03 19:04:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:04:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407763042] [2023-08-03 19:04:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:04:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:04:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:04:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 19:04:54,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:04:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407763042] [2023-08-03 19:04:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407763042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:04:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001482175] [2023-08-03 19:04:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:04:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:04:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:04:54,157 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:04:54,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-03 19:04:54,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 19:04:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:04:54,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-03 19:04:54,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:04:54,323 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-03 19:04:54,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-03 19:04:54,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,448 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-03 19:04:54,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-03 19:04:54,533 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-03 19:04:54,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 19:04:54,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:04:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 19:04:54,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:04:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 19:04:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001482175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:04:55,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:04:55,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 29 [2023-08-03 19:04:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756537239] [2023-08-03 19:04:55,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:04:55,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-03 19:04:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:04:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-03 19:04:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=774, Unknown=2, NotChecked=0, Total=870 [2023-08-03 19:04:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 265 [2023-08-03 19:04:56,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 4350 transitions, 78505 flow. Second operand has 30 states, 30 states have (on average 72.23333333333333) internal successors, (2167), 30 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:04:56,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:04:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 265 [2023-08-03 19:04:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:22,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:05:31,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:06:11,484 INFO L124 PetriNetUnfolderBase]: 51480/75134 cut-off events. [2023-08-03 19:06:11,485 INFO L125 PetriNetUnfolderBase]: For 1565892/1565902 co-relation queries the response was YES. [2023-08-03 19:06:16,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737059 conditions, 75134 events. 51480/75134 cut-off events. For 1565892/1565902 co-relation queries the response was YES. Maximal size of possible extension queue 3166. Compared 551113 event pairs, 852 based on Foata normal form. 378/75510 useless extension candidates. Maximal degree in co-relation 736824. Up to 17996 conditions per place. [2023-08-03 19:06:16,812 INFO L140 encePairwiseOnDemand]: 248/265 looper letters, 3533 selfloop transitions, 5129 changer transitions 0/8666 dead transitions. [2023-08-03 19:06:16,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 8666 transitions, 178310 flow [2023-08-03 19:06:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-03 19:06:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-03 19:06:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5953 transitions. [2023-08-03 19:06:16,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2880019351717465 [2023-08-03 19:06:16,817 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5953 transitions. [2023-08-03 19:06:16,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5953 transitions. [2023-08-03 19:06:16,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:06:16,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5953 transitions. [2023-08-03 19:06:16,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 76.32051282051282) internal successors, (5953), 78 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:06:16,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 265.0) internal successors, (20935), 79 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:06:16,831 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 265.0) internal successors, (20935), 79 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:06:16,831 INFO L175 Difference]: Start difference. First operand has 745 places, 4350 transitions, 78505 flow. Second operand 78 states and 5953 transitions. [2023-08-03 19:06:16,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 8666 transitions, 178310 flow [2023-08-03 19:09:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 8666 transitions, 173748 flow, removed 2188 selfloop flow, removed 24 redundant places. [2023-08-03 19:09:13,638 INFO L231 Difference]: Finished difference. Result has 805 places, 6954 transitions, 142659 flow [2023-08-03 19:09:13,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=75137, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2718, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=142659, PETRI_PLACES=805, PETRI_TRANSITIONS=6954} [2023-08-03 19:09:13,641 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 757 predicate places. [2023-08-03 19:09:13,641 INFO L495 AbstractCegarLoop]: Abstraction has has 805 places, 6954 transitions, 142659 flow [2023-08-03 19:09:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 72.23333333333333) internal successors, (2167), 30 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:09:13,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:09:13,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:09:13,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-03 19:09:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-03 19:09:13,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:09:13,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:09:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -215009003, now seen corresponding path program 5 times [2023-08-03 19:09:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:09:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020244885] [2023-08-03 19:09:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:09:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:09:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:09:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:09:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:09:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020244885] [2023-08-03 19:09:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020244885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:09:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100831579] [2023-08-03 19:09:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-03 19:09:14,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:09:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:09:14,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:09:14,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-03 19:09:14,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-03 19:09:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:09:14,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-03 19:09:14,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:09:14,696 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-03 19:09:14,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-03 19:09:14,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:09:14,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:09:15,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:09:15,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 19:09:16,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 19:09:16,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 19:09:16,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 19:09:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:09:16,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:09:17,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 800 treesize of output 784 [2023-08-03 19:09:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:09:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100831579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:09:18,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:09:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 31 [2023-08-03 19:09:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096105210] [2023-08-03 19:09:18,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:09:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-03 19:09:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:09:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-03 19:09:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2023-08-03 19:09:31,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 265 [2023-08-03 19:09:31,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 6954 transitions, 142659 flow. Second operand has 32 states, 32 states have (on average 99.875) internal successors, (3196), 32 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:09:31,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:09:31,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 265 [2023-08-03 19:09:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:11:08,533 INFO L124 PetriNetUnfolderBase]: 47327/72009 cut-off events. [2023-08-03 19:11:08,533 INFO L125 PetriNetUnfolderBase]: For 1911819/1917528 co-relation queries the response was YES. [2023-08-03 19:11:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795245 conditions, 72009 events. 47327/72009 cut-off events. For 1911819/1917528 co-relation queries the response was YES. Maximal size of possible extension queue 3238. Compared 566345 event pairs, 2614 based on Foata normal form. 1238/72811 useless extension candidates. Maximal degree in co-relation 794997. Up to 57437 conditions per place. [2023-08-03 19:11:13,968 INFO L140 encePairwiseOnDemand]: 251/265 looper letters, 6780 selfloop transitions, 786 changer transitions 21/8028 dead transitions. [2023-08-03 19:11:13,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 8028 transitions, 175143 flow [2023-08-03 19:11:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-03 19:11:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-03 19:11:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 5545 transitions. [2023-08-03 19:11:13,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39480242079031685 [2023-08-03 19:11:13,973 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 5545 transitions. [2023-08-03 19:11:13,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 5545 transitions. [2023-08-03 19:11:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:11:13,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 5545 transitions. [2023-08-03 19:11:13,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 104.62264150943396) internal successors, (5545), 53 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:14,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 265.0) internal successors, (14310), 54 states have internal predecessors, (14310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:14,005 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 265.0) internal successors, (14310), 54 states have internal predecessors, (14310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:14,005 INFO L175 Difference]: Start difference. First operand has 805 places, 6954 transitions, 142659 flow. Second operand 53 states and 5545 transitions. [2023-08-03 19:11:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 857 places, 8028 transitions, 175143 flow Received shutdown request... [2023-08-03 19:12:14,433 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 19:12:14,433 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 19:12:15,382 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 19:12:15,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-03 19:12:15,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-03 19:12:15,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-03 19:12:15,586 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-03 19:12:15,586 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 19:12:15,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:12:15,587 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:12:15,588 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 19:12:15,588 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 19:12:15,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 07:12:15 BasicIcfg [2023-08-03 19:12:15,590 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 19:12:15,591 INFO L158 Benchmark]: Toolchain (without parser) took 831194.82ms. Allocated memory was 591.4MB in the beginning and 10.3GB in the end (delta: 9.8GB). Free memory was 550.2MB in the beginning and 5.3GB in the end (delta: -4.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 388.0MB. Free memory is still 340.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.77ms. Allocated memory is still 591.4MB. Free memory was 549.9MB in the beginning and 517.3MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.16ms. Allocated memory is still 591.4MB. Free memory was 517.3MB in the beginning and 514.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: Boogie Preprocessor took 37.60ms. Allocated memory is still 591.4MB. Free memory was 514.6MB in the beginning and 513.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: RCFGBuilder took 285.46ms. Allocated memory is still 591.4MB. Free memory was 512.8MB in the beginning and 550.8MB in the end (delta: -38.0MB). Peak memory consumption was 16.5MB. Max. memory is 16.0GB. [2023-08-03 19:12:15,591 INFO L158 Benchmark]: TraceAbstraction took 830345.54ms. Allocated memory was 591.4MB in the beginning and 10.3GB in the end (delta: 9.8GB). Free memory was 550.8MB in the beginning and 5.3GB in the end (delta: -4.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-03 19:12:15,592 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 388.0MB. Free memory is still 340.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 471.77ms. Allocated memory is still 591.4MB. Free memory was 549.9MB in the beginning and 517.3MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.16ms. Allocated memory is still 591.4MB. Free memory was 517.3MB in the beginning and 514.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.60ms. Allocated memory is still 591.4MB. Free memory was 514.6MB in the beginning and 513.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 285.46ms. Allocated memory is still 591.4MB. Free memory was 512.8MB in the beginning and 550.8MB in the end (delta: -38.0MB). Peak memory consumption was 16.5MB. Max. memory is 16.0GB. * TraceAbstraction took 830345.54ms. Allocated memory was 591.4MB in the beginning and 10.3GB in the end (delta: 9.8GB). Free memory was 550.8MB in the beginning and 5.3GB in the end (delta: -4.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 109 PlacesBefore, 33 PlacesAfterwards, 116 TransitionsBefore, 35 TransitionsAfterwards, 2556 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 99 TotalNumberOfCompositions, 4289 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3013, independent: 2919, independent conditional: 0, independent unconditional: 2919, dependent: 94, dependent conditional: 0, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1503, independent: 1467, independent conditional: 0, independent unconditional: 1467, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3013, independent: 1452, independent conditional: 0, independent unconditional: 1452, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 1503, unknown conditional: 0, unknown unconditional: 1503] , Statistics on independence cache: Total cache size (in pairs): 95, Positive cache size: 85, Positive conditional cache size: 0, Positive unconditional cache size: 85, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 136 PlacesBefore, 48 PlacesAfterwards, 145 TransitionsBefore, 52 TransitionsAfterwards, 6648 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 32 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 15145 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9301, independent: 9095, independent conditional: 0, independent unconditional: 9095, dependent: 206, dependent conditional: 0, dependent unconditional: 206, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3824, independent: 3770, independent conditional: 0, independent unconditional: 3770, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9301, independent: 5325, independent conditional: 0, independent unconditional: 5325, dependent: 152, dependent conditional: 0, dependent unconditional: 152, unknown: 3824, unknown conditional: 0, unknown unconditional: 3824] , Statistics on independence cache: Total cache size (in pairs): 255, Positive cache size: 237, Positive conditional cache size: 0, Positive unconditional cache size: 237, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 1122]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 1124]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 69 IncrementalHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 69 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 151 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 827.7s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 801.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 334 mSolverCounterUnknown, 10626 SdHoareTripleChecker+Valid, 80.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10153 mSDsluCounter, 20432 SdHoareTripleChecker+Invalid, 75.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5201 IncrementalHoareTripleChecker+Unchecked, 20302 mSDsCounter, 1568 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55854 IncrementalHoareTripleChecker+Invalid, 62957 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1568 mSolverCounterUnsat, 130 mSDtfsCounter, 55854 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2315 GetRequests, 1393 SyntacticMatches, 28 SemanticMatches, 894 ConstructedPredicates, 9 IntricatePredicates, 7 DeprecatedPredicates, 21697 ImplicationChecksByTransitivity, 75.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142659occurred in iteration=22, InterpolantAutomatonStates: 650, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.9s InterpolantComputationTime, 1735 NumberOfCodeBlocks, 1706 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 2398 ConstructedInterpolants, 298 QuantifiedInterpolants, 26843 SizeOfPredicates, 164 NumberOfNonLiveVariables, 5173 ConjunctsInSsa, 565 ConjunctsInUnsatCore, 59 InterpolantComputations, 8 PerfectInterpolantSequences, 643/1107 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown