/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:43:08,856 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:43:08,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 22:43:08,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:43:08,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:43:08,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:43:08,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:43:08,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:43:08,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:43:08,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:43:08,964 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:43:08,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:43:08,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:43:08,965 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:43:08,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:43:08,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:43:08,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:43:08,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:43:08,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:43:08,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:43:08,966 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:43:08,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:43:08,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:43:08,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:43:08,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:43:08,968 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:43:08,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:43:08,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:08,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:43:08,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:43:08,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:43:08,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:43:08,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:43:08,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:43:08,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:43:08,970 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:43:09,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:43:09,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:43:09,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:43:09,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:43:09,255 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:43:09,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-23 22:43:10,262 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:43:10,510 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:43:10,511 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-23 22:43:10,528 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9b0c450/a1d40b7ec4314c16a0513d01a6b6ae8d/FLAG7edb4f66f [2023-08-23 22:43:10,540 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9b0c450/a1d40b7ec4314c16a0513d01a6b6ae8d [2023-08-23 22:43:10,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:43:10,544 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:43:10,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:10,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:43:10,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:43:10,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:10,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722bda73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10, skipping insertion in model container [2023-08-23 22:43:10,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:10,595 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:43:10,739 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:43:10,846 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2023-08-23 22:43:10,851 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2023-08-23 22:43:10,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:10,871 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:43:10,892 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:43:10,896 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-23 22:43:10,898 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-23 22:43:10,905 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2023-08-23 22:43:10,908 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2023-08-23 22:43:10,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:10,929 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:10,930 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:10,930 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:10,934 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:43:10,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10 WrapperNode [2023-08-23 22:43:10,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:10,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:10,936 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:43:10,936 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:43:10,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:10,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:10,997 INFO L138 Inliner]: procedures = 171, calls = 75, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-08-23 22:43:10,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:10,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:43:10,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:43:10,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:43:11,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,025 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:43:11,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:43:11,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:43:11,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:43:11,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (1/1) ... [2023-08-23 22:43:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:43:11,082 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) [2023-08-23 22:43:11,085 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 [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-23 22:43:11,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:43:11,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:43:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:43:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:43:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:43:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:43:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:43:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:43:11,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:43:11,115 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:43:11,233 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:43:11,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:43:11,390 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:43:11,394 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:43:11,394 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-23 22:43:11,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:11 BoogieIcfgContainer [2023-08-23 22:43:11,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:43:11,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:43:11,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:43:11,399 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:43:11,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:43:10" (1/3) ... [2023-08-23 22:43:11,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f6155c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:11, skipping insertion in model container [2023-08-23 22:43:11,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:10" (2/3) ... [2023-08-23 22:43:11,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f6155c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:11, skipping insertion in model container [2023-08-23 22:43:11,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:11" (3/3) ... [2023-08-23 22:43:11,401 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2023-08-23 22:43:11,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:43:11,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-23 22:43:11,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:43:11,503 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 22:43:11,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 113 transitions, 242 flow [2023-08-23 22:43:11,581 INFO L124 PetriNetUnfolderBase]: 20/111 cut-off events. [2023-08-23 22:43:11,581 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:11,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 111 events. 20/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 83. Up to 3 conditions per place. [2023-08-23 22:43:11,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 113 transitions, 242 flow [2023-08-23 22:43:11,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 102 transitions, 213 flow [2023-08-23 22:43:11,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:11,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 102 transitions, 213 flow [2023-08-23 22:43:11,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 102 transitions, 213 flow [2023-08-23 22:43:11,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 102 transitions, 213 flow [2023-08-23 22:43:11,628 INFO L124 PetriNetUnfolderBase]: 20/102 cut-off events. [2023-08-23 22:43:11,629 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:43:11,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 102 events. 20/102 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 83. Up to 3 conditions per place. [2023-08-23 22:43:11,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 3672 [2023-08-23 22:43:12,978 INFO L134 LiptonReduction]: Checked pairs total: 7688 [2023-08-23 22:43:12,978 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-23 22:43:12,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:12,991 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=false, 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;@655ff59c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:12,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:43:12,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:12,996 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-23 22:43:12,996 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:12,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:12,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:12,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:13,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2670786, now seen corresponding path program 1 times [2023-08-23 22:43:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:13,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633141194] [2023-08-23 22:43:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:13,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:13,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633141194] [2023-08-23 22:43:13,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633141194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:13,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:43:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720474365] [2023-08-23 22:43:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:43:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:43:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:43:13,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 185 [2023-08-23 22:43:13,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:13,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 185 [2023-08-23 22:43:13,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:13,335 INFO L124 PetriNetUnfolderBase]: 833/1290 cut-off events. [2023-08-23 22:43:13,336 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-23 22:43:13,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1290 events. 833/1290 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5533 event pairs, 245 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 2315. Up to 809 conditions per place. [2023-08-23 22:43:13,362 INFO L140 encePairwiseOnDemand]: 179/185 looper letters, 46 selfloop transitions, 3 changer transitions 2/62 dead transitions. [2023-08-23 22:43:13,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 238 flow [2023-08-23 22:43:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:43:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:43:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-23 22:43:13,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5963963963963964 [2023-08-23 22:43:13,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-23 22:43:13,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-23 22:43:13,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:13,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-23 22:43:13,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,384 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 99 flow. Second operand 3 states and 331 transitions. [2023-08-23 22:43:13,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 238 flow [2023-08-23 22:43:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 231 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 22:43:13,389 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 112 flow [2023-08-23 22:43:13,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-23 22:43:13,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-23 22:43:13,393 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 112 flow [2023-08-23 22:43:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:13,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:43:13,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:13,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 816907994, now seen corresponding path program 1 times [2023-08-23 22:43:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292944875] [2023-08-23 22:43:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:13,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292944875] [2023-08-23 22:43:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292944875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:13,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:43:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142786633] [2023-08-23 22:43:13,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:13,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:43:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:43:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:43:13,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 185 [2023-08-23 22:43:13,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:13,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 185 [2023-08-23 22:43:13,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:13,553 INFO L124 PetriNetUnfolderBase]: 773/1202 cut-off events. [2023-08-23 22:43:13,553 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-23 22:43:13,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1202 events. 773/1202 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5066 event pairs, 248 based on Foata normal form. 34/905 useless extension candidates. Maximal degree in co-relation 1500. Up to 811 conditions per place. [2023-08-23 22:43:13,559 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 41 selfloop transitions, 2 changer transitions 6/60 dead transitions. [2023-08-23 22:43:13,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 241 flow [2023-08-23 22:43:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:43:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:43:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-23 22:43:13,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891891891891892 [2023-08-23 22:43:13,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-23 22:43:13,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-23 22:43:13,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:13,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-23 22:43:13,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,566 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 112 flow. Second operand 3 states and 327 transitions. [2023-08-23 22:43:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 241 flow [2023-08-23 22:43:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:43:13,569 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 116 flow [2023-08-23 22:43:13,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-08-23 22:43:13,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-23 22:43:13,570 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 116 flow [2023-08-23 22:43:13,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:13,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:13,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:43:13,571 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:13,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -477489175, now seen corresponding path program 1 times [2023-08-23 22:43:13,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810867726] [2023-08-23 22:43:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:13,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810867726] [2023-08-23 22:43:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810867726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:13,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482203223] [2023-08-23 22:43:13,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:43:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:43:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:43:13,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 185 [2023-08-23 22:43:13,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:13,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 185 [2023-08-23 22:43:13,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:13,803 INFO L124 PetriNetUnfolderBase]: 886/1437 cut-off events. [2023-08-23 22:43:13,803 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-08-23 22:43:13,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 1437 events. 886/1437 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6513 event pairs, 281 based on Foata normal form. 24/1148 useless extension candidates. Maximal degree in co-relation 1902. Up to 703 conditions per place. [2023-08-23 22:43:13,807 INFO L140 encePairwiseOnDemand]: 168/185 looper letters, 43 selfloop transitions, 6 changer transitions 37/93 dead transitions. [2023-08-23 22:43:13,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 93 transitions, 405 flow [2023-08-23 22:43:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:43:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:43:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 464 transitions. [2023-08-23 22:43:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016216216216216 [2023-08-23 22:43:13,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 464 transitions. [2023-08-23 22:43:13,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 464 transitions. [2023-08-23 22:43:13,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:13,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 464 transitions. [2023-08-23 22:43:13,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,812 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 116 flow. Second operand 5 states and 464 transitions. [2023-08-23 22:43:13,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 93 transitions, 405 flow [2023-08-23 22:43:13,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 93 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:43:13,814 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 171 flow [2023-08-23 22:43:13,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-23 22:43:13,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-23 22:43:13,815 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 171 flow [2023-08-23 22:43:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:43:13,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:13,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -356387513, now seen corresponding path program 2 times [2023-08-23 22:43:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613433212] [2023-08-23 22:43:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:13,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:13,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613433212] [2023-08-23 22:43:13,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613433212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:13,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:13,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:13,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978443339] [2023-08-23 22:43:13,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:13,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:43:13,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:43:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:43:13,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 185 [2023-08-23 22:43:13,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:13,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:13,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 185 [2023-08-23 22:43:13,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:14,011 INFO L124 PetriNetUnfolderBase]: 698/1227 cut-off events. [2023-08-23 22:43:14,011 INFO L125 PetriNetUnfolderBase]: For 1014/1016 co-relation queries the response was YES. [2023-08-23 22:43:14,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 1227 events. 698/1227 cut-off events. For 1014/1016 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5844 event pairs, 200 based on Foata normal form. 40/1198 useless extension candidates. Maximal degree in co-relation 2067. Up to 508 conditions per place. [2023-08-23 22:43:14,015 INFO L140 encePairwiseOnDemand]: 168/185 looper letters, 52 selfloop transitions, 21 changer transitions 11/91 dead transitions. [2023-08-23 22:43:14,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 545 flow [2023-08-23 22:43:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:43:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:43:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 456 transitions. [2023-08-23 22:43:14,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492972972972973 [2023-08-23 22:43:14,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 456 transitions. [2023-08-23 22:43:14,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 456 transitions. [2023-08-23 22:43:14,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:14,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 456 transitions. [2023-08-23 22:43:14,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,019 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,019 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 171 flow. Second operand 5 states and 456 transitions. [2023-08-23 22:43:14,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 545 flow [2023-08-23 22:43:14,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 488 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-23 22:43:14,023 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 343 flow [2023-08-23 22:43:14,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-23 22:43:14,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2023-08-23 22:43:14,024 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 343 flow [2023-08-23 22:43:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:14,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:43:14,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:14,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 942225471, now seen corresponding path program 3 times [2023-08-23 22:43:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273654292] [2023-08-23 22:43:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:14,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273654292] [2023-08-23 22:43:14,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273654292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:14,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:14,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:14,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347133656] [2023-08-23 22:43:14,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:14,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:43:14,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:43:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:43:14,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2023-08-23 22:43:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2023-08-23 22:43:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:14,157 INFO L124 PetriNetUnfolderBase]: 631/1100 cut-off events. [2023-08-23 22:43:14,157 INFO L125 PetriNetUnfolderBase]: For 1714/1716 co-relation queries the response was YES. [2023-08-23 22:43:14,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3375 conditions, 1100 events. 631/1100 cut-off events. For 1714/1716 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5207 event pairs, 280 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 2230. Up to 870 conditions per place. [2023-08-23 22:43:14,161 INFO L140 encePairwiseOnDemand]: 182/185 looper letters, 67 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-23 22:43:14,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 591 flow [2023-08-23 22:43:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:43:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:43:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-23 22:43:14,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2023-08-23 22:43:14,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-23 22:43:14,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-23 22:43:14,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:14,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-23 22:43:14,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,164 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 343 flow. Second operand 3 states and 305 transitions. [2023-08-23 22:43:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 591 flow [2023-08-23 22:43:14,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 573 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:14,169 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 340 flow [2023-08-23 22:43:14,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-23 22:43:14,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-23 22:43:14,169 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 340 flow [2023-08-23 22:43:14,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:14,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:14,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:43:14,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:43:14,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2103860801, now seen corresponding path program 4 times [2023-08-23 22:43:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:14,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482426030] [2023-08-23 22:43:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:14,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:14,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482426030] [2023-08-23 22:43:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482426030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:14,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:14,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:14,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787957432] [2023-08-23 22:43:14,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:14,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:43:14,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:43:14,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:43:14,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 185 [2023-08-23 22:43:14,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:14,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 185 [2023-08-23 22:43:14,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:14,356 INFO L124 PetriNetUnfolderBase]: 740/1266 cut-off events. [2023-08-23 22:43:14,356 INFO L125 PetriNetUnfolderBase]: For 1843/1911 co-relation queries the response was YES. [2023-08-23 22:43:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 1266 events. 740/1266 cut-off events. For 1843/1911 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5865 event pairs, 235 based on Foata normal form. 50/1281 useless extension candidates. Maximal degree in co-relation 2653. Up to 654 conditions per place. [2023-08-23 22:43:14,360 INFO L140 encePairwiseOnDemand]: 169/185 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2023-08-23 22:43:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 690 flow [2023-08-23 22:43:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:43:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:43:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 451 transitions. [2023-08-23 22:43:14,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875675675675676 [2023-08-23 22:43:14,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 451 transitions. [2023-08-23 22:43:14,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 451 transitions. [2023-08-23 22:43:14,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:14,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 451 transitions. [2023-08-23 22:43:14,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.2) internal successors, (451), 5 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,366 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 340 flow. Second operand 5 states and 451 transitions. [2023-08-23 22:43:14,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 690 flow [2023-08-23 22:43:14,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 671 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-23 22:43:14,372 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-23 22:43:14,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-23 22:43:14,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2023-08-23 22:43:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-23 22:43:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:14,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-23 22:43:14,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-23 22:43:14,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-23 22:43:14,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-23 22:43:14,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:43:14,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:43:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:43:14,380 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-08-23 22:43:14,383 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:43:14,384 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:43:14,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:43:14 BasicIcfg [2023-08-23 22:43:14,386 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:43:14,389 INFO L158 Benchmark]: Toolchain (without parser) took 3841.94ms. Allocated memory was 343.9MB in the beginning and 429.9MB in the end (delta: 86.0MB). Free memory was 317.5MB in the beginning and 249.6MB in the end (delta: 67.9MB). Peak memory consumption was 156.0MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,390 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:43:14,392 INFO L158 Benchmark]: CACSL2BoogieTranslator took 388.93ms. Allocated memory is still 343.9MB. Free memory was 317.5MB in the beginning and 296.9MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,392 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.16ms. Allocated memory is still 343.9MB. Free memory was 296.9MB in the beginning and 294.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,392 INFO L158 Benchmark]: Boogie Preprocessor took 45.90ms. Allocated memory is still 343.9MB. Free memory was 294.7MB in the beginning and 293.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,393 INFO L158 Benchmark]: RCFGBuilder took 351.56ms. Allocated memory is still 343.9MB. Free memory was 293.0MB in the beginning and 278.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,394 INFO L158 Benchmark]: TraceAbstraction took 2988.47ms. Allocated memory was 343.9MB in the beginning and 429.9MB in the end (delta: 86.0MB). Free memory was 277.7MB in the beginning and 249.6MB in the end (delta: 28.1MB). Peak memory consumption was 116.2MB. Max. memory is 16.0GB. [2023-08-23 22:43:14,396 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 388.93ms. Allocated memory is still 343.9MB. Free memory was 317.5MB in the beginning and 296.9MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.16ms. Allocated memory is still 343.9MB. Free memory was 296.9MB in the beginning and 294.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.90ms. Allocated memory is still 343.9MB. Free memory was 294.7MB in the beginning and 293.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 351.56ms. Allocated memory is still 343.9MB. Free memory was 293.0MB in the beginning and 278.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 2988.47ms. Allocated memory was 343.9MB in the beginning and 429.9MB in the end (delta: 86.0MB). Free memory was 277.7MB in the beginning and 249.6MB in the end (delta: 28.1MB). Peak memory consumption was 116.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 89 PlacesBefore, 41 PlacesAfterwards, 102 TransitionsBefore, 45 TransitionsAfterwards, 3672 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 9 ChoiceCompositions, 72 TotalNumberOfCompositions, 7688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3500, independent: 3272, independent conditional: 0, independent unconditional: 3272, dependent: 228, dependent conditional: 0, dependent unconditional: 228, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1777, independent: 1737, independent conditional: 0, independent unconditional: 1737, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3500, independent: 1535, independent conditional: 0, independent unconditional: 1535, dependent: 188, dependent conditional: 0, dependent unconditional: 188, unknown: 1777, unknown conditional: 0, unknown unconditional: 1777] , Statistics on independence cache: Total cache size (in pairs): 194, Positive cache size: 166, Positive conditional cache size: 0, Positive unconditional cache size: 166, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 802]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 745]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 150 locations, 6 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: 2.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 174 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 174 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 681 IncrementalHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 24 mSDtfsCounter, 681 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=343occurred in iteration=4, InterpolantAutomatonStates: 24, 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, 0.2s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-23 22:43:14,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...