/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/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:54:09,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:54:09,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:54:09,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:54:09,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:54:09,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:54:09,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:54:09,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:54:09,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:54:09,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:54:09,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:54:09,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:54:09,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:54:09,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:54:09,421 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:54:09,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:54:09,421 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:54:09,421 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:54:09,421 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:54:09,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:54:09,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:54:09,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:54:09,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:54:09,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:54:09,423 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:54:09,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:54:09,425 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:54:09,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:54:09,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:54:09,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:54:09,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:54:09,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:54:09,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:54:09,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:54:09,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:54:09,427 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:54:09,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:54:09,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:54:09,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:54:09,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:54:09,644 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:54:09,644 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:54:09,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i [2023-08-03 15:54:10,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:54:10,842 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:54:10,842 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i [2023-08-03 15:54:10,874 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b502ed9bd/3fff9f2f695a4696a3dc5d9533a34721/FLAG5c30ff04c [2023-08-03 15:54:11,191 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b502ed9bd/3fff9f2f695a4696a3dc5d9533a34721 [2023-08-03 15:54:11,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:54:11,195 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:54:11,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:54:11,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:54:11,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:54:11,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244f146f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11, skipping insertion in model container [2023-08-03 15:54:11,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,230 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:54:11,481 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i[46865,46878] [2023-08-03 15:54:11,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:54:11,503 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:54:11,527 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 15:54:11,528 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 15:54:11,541 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i[46865,46878] [2023-08-03 15:54:11,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:54:11,604 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 15:54:11,604 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 15:54:11,609 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:54:11,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11 WrapperNode [2023-08-03 15:54:11,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:54:11,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:54:11,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:54:11,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:54:11,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,656 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2023-08-03 15:54:11,656 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:54:11,656 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:54:11,656 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:54:11,657 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:54:11,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,671 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:54:11,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:54:11,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:54:11,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:54:11,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (1/1) ... [2023-08-03 15:54:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:54:11,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:11,726 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 15:54:11,735 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 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-08-03 15:54:11,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:54:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 15:54:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:54:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:54:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:54:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:54:11,757 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 15:54:11,854 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:54:11,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:54:11,960 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:54:11,978 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:54:11,979 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 15:54:11,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:54:11 BoogieIcfgContainer [2023-08-03 15:54:11,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:54:11,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:54:11,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:54:11,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:54:11,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:54:11" (1/3) ... [2023-08-03 15:54:11,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29787095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:54:11, skipping insertion in model container [2023-08-03 15:54:11,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:54:11" (2/3) ... [2023-08-03 15:54:11,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29787095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:54:11, skipping insertion in model container [2023-08-03 15:54:11,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:54:11" (3/3) ... [2023-08-03 15:54:11,987 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-lit_sssc12_bound2.i [2023-08-03 15:54:11,991 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:54:11,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:54:11,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:54:11,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:54:12,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 15:54:12,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,089 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-03 15:54:12,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:54:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-08-03 15:54:12,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:54:12,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 15:54:12,157 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-03 15:54:12,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:54:12,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-08-03 15:54:12,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 1054 [2023-08-03 15:54:14,486 INFO L134 LiptonReduction]: Checked pairs total: 863 [2023-08-03 15:54:14,487 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 15:54:14,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:54:14,500 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;@261bb1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:54:14,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 15:54:14,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:54:14,502 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-08-03 15:54:14,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:54:14,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:14,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 15:54:14,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 15:54:14,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 353103505, now seen corresponding path program 1 times [2023-08-03 15:54:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:14,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565789491] [2023-08-03 15:54:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:14,878 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 15:54:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565789491] [2023-08-03 15:54:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565789491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:14,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:54:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19269711] [2023-08-03 15:54:14,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:14,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 15:54:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 15:54:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 15:54:14,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 165 [2023-08-03 15:54:14,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 15:54:14,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:14,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 165 [2023-08-03 15:54:14,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:14,994 INFO L124 PetriNetUnfolderBase]: 19/47 cut-off events. [2023-08-03 15:54:14,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:54:14,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 47 events. 19/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 84. Up to 26 conditions per place. [2023-08-03 15:54:14,997 INFO L140 encePairwiseOnDemand]: 161/165 looper letters, 14 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2023-08-03 15:54:14,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 18 transitions, 75 flow [2023-08-03 15:54:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:54:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:54:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-08-03 15:54:15,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2023-08-03 15:54:15,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-08-03 15:54:15,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-08-03 15:54:15,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:15,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-08-03 15:54:15,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 15:54:15,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 15:54:15,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 15:54:15,028 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 4 states and 266 transitions. [2023-08-03 15:54:15,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 18 transitions, 75 flow [2023-08-03 15:54:15,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 18 transitions, 75 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:54:15,031 INFO L231 Difference]: Finished difference. Result has 16 places, 11 transitions, 39 flow [2023-08-03 15:54:15,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=39, PETRI_PLACES=16, PETRI_TRANSITIONS=11} [2023-08-03 15:54:15,035 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 4 predicate places. [2023-08-03 15:54:15,036 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 11 transitions, 39 flow [2023-08-03 15:54:15,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 15:54:15,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:15,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:54:15,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:54:15,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 15:54:15,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1938710832, now seen corresponding path program 1 times [2023-08-03 15:54:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:15,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608521480] [2023-08-03 15:54:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:54:15,069 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:54:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:54:15,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:54:15,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:54:15,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 15:54:15,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 15:54:15,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 15:54:15,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 15:54:15,112 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 15:54:15,116 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:54:15,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:54:15,134 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 15:54:15,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,171 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 15:54:15,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 15:54:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 15:54:15,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:54:15,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 15:54:15,206 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 15:54:15,206 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 15:54:15,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 15:54:15,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-03 15:54:17,209 INFO L134 LiptonReduction]: Checked pairs total: 6987 [2023-08-03 15:54:17,209 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 15:54:17,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:54:17,212 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;@261bb1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:54:17,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 15:54:17,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:54:17,214 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-08-03 15:54:17,214 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 15:54:17,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:17,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:17,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:17,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1589665479, now seen corresponding path program 1 times [2023-08-03 15:54:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:17,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81011625] [2023-08-03 15:54:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:17,267 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 15:54:17,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81011625] [2023-08-03 15:54:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81011625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:54:17,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765128296] [2023-08-03 15:54:17,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:54:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:54:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:54:17,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 221 [2023-08-03 15:54:17,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 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) [2023-08-03 15:54:17,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:17,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 221 [2023-08-03 15:54:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:17,393 INFO L124 PetriNetUnfolderBase]: 685/1109 cut-off events. [2023-08-03 15:54:17,393 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 15:54:17,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1109 events. 685/1109 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5147 event pairs, 312 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 997. Up to 628 conditions per place. [2023-08-03 15:54:17,398 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 36 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-03 15:54:17,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 177 flow [2023-08-03 15:54:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:54:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:54:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-03 15:54:17,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766214177978884 [2023-08-03 15:54:17,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-03 15:54:17,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-03 15:54:17,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:17,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-03 15:54:17,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:54:17,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:17,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:17,403 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 316 transitions. [2023-08-03 15:54:17,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 177 flow [2023-08-03 15:54:17,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 175 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 15:54:17,404 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-08-03 15:54:17,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-03 15:54:17,404 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-03 15:54:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-08-03 15:54:17,405 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) [2023-08-03 15:54:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 15:54:17,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:17,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash 168879228, now seen corresponding path program 1 times [2023-08-03 15:54:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16787931] [2023-08-03 15:54:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:17,479 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 15:54:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:17,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16787931] [2023-08-03 15:54:17,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16787931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:17,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:17,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:54:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103022958] [2023-08-03 15:54:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 15:54:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 15:54:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:54:17,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 221 [2023-08-03 15:54:17,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 15:54:17,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:17,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 221 [2023-08-03 15:54:17,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:17,699 INFO L124 PetriNetUnfolderBase]: 1136/1892 cut-off events. [2023-08-03 15:54:17,700 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-03 15:54:17,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 1892 events. 1136/1892 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10072 event pairs, 243 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 2197. Up to 692 conditions per place. [2023-08-03 15:54:17,708 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 78 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2023-08-03 15:54:17,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 93 transitions, 419 flow [2023-08-03 15:54:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 15:54:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 15:54:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 597 transitions. [2023-08-03 15:54:17,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502262443438914 [2023-08-03 15:54:17,709 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 597 transitions. [2023-08-03 15:54:17,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 597 transitions. [2023-08-03 15:54:17,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:17,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 597 transitions. [2023-08-03 15:54:17,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 15:54:17,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 15:54:17,713 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 15:54:17,713 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 6 states and 597 transitions. [2023-08-03 15:54:17,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 93 transitions, 419 flow [2023-08-03 15:54:17,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 93 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:54:17,716 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 159 flow [2023-08-03 15:54:17,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-08-03 15:54:17,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-08-03 15:54:17,717 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 159 flow [2023-08-03 15:54:17,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 15:54:17,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:17,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:54:17,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 15:54:17,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:17,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1357249054, now seen corresponding path program 1 times [2023-08-03 15:54:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:17,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013720005] [2023-08-03 15:54:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:17,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:17,751 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 15:54:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013720005] [2023-08-03 15:54:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013720005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17255145] [2023-08-03 15:54:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:17,759 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 15:54:17,769 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 15:54:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:17,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:54:17,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:17,875 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 15:54:17,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:54:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17255145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:17,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:54:17,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:54:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531753456] [2023-08-03 15:54:17,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:54:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:54:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:54:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 221 [2023-08-03 15:54:17,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 15:54:17,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:17,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 221 [2023-08-03 15:54:17,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:18,012 INFO L124 PetriNetUnfolderBase]: 773/1287 cut-off events. [2023-08-03 15:54:18,012 INFO L125 PetriNetUnfolderBase]: For 842/875 co-relation queries the response was YES. [2023-08-03 15:54:18,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3277 conditions, 1287 events. 773/1287 cut-off events. For 842/875 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6405 event pairs, 26 based on Foata normal form. 29/1121 useless extension candidates. Maximal degree in co-relation 1443. Up to 875 conditions per place. [2023-08-03 15:54:18,017 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 60 selfloop transitions, 4 changer transitions 1/72 dead transitions. [2023-08-03 15:54:18,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 72 transitions, 443 flow [2023-08-03 15:54:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:54:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:54:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 516 transitions. [2023-08-03 15:54:18,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669683257918552 [2023-08-03 15:54:18,018 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 516 transitions. [2023-08-03 15:54:18,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 516 transitions. [2023-08-03 15:54:18,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:18,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 516 transitions. [2023-08-03 15:54:18,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 15:54:18,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states 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 15:54:18,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states 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 15:54:18,022 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 159 flow. Second operand 5 states and 516 transitions. [2023-08-03 15:54:18,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 72 transitions, 443 flow [2023-08-03 15:54:18,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 72 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:54:18,024 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 175 flow [2023-08-03 15:54:18,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-03 15:54:18,025 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-08-03 15:54:18,025 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 175 flow [2023-08-03 15:54:18,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 15:54:18,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:18,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:18,035 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 15:54:18,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:18,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:18,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1362936377, now seen corresponding path program 1 times [2023-08-03 15:54:18,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:18,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024727581] [2023-08-03 15:54:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:18,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:18,260 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 15:54:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:18,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024727581] [2023-08-03 15:54:18,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024727581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:18,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:18,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:54:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750064658] [2023-08-03 15:54:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:54:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:54:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:54:18,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 221 [2023-08-03 15:54:18,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 175 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) [2023-08-03 15:54:18,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:18,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 221 [2023-08-03 15:54:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:18,385 INFO L124 PetriNetUnfolderBase]: 924/1540 cut-off events. [2023-08-03 15:54:18,385 INFO L125 PetriNetUnfolderBase]: For 1865/1892 co-relation queries the response was YES. [2023-08-03 15:54:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4660 conditions, 1540 events. 924/1540 cut-off events. For 1865/1892 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7945 event pairs, 463 based on Foata normal form. 23/1398 useless extension candidates. Maximal degree in co-relation 2884. Up to 1022 conditions per place. [2023-08-03 15:54:18,392 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 46 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-03 15:54:18,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 343 flow [2023-08-03 15:54:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:54:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:54:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-03 15:54:18,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473604826546003 [2023-08-03 15:54:18,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-03 15:54:18,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-03 15:54:18,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:18,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-03 15:54:18,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 15:54:18,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:18,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:18,395 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 175 flow. Second operand 3 states and 314 transitions. [2023-08-03 15:54:18,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 343 flow [2023-08-03 15:54:18,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:54:18,399 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 184 flow [2023-08-03 15:54:18,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-03 15:54:18,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-03 15:54:18,399 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 184 flow [2023-08-03 15:54:18,399 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) [2023-08-03 15:54:18,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:18,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:18,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 15:54:18,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:18,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 940289756, now seen corresponding path program 1 times [2023-08-03 15:54:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:18,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216930200] [2023-08-03 15:54:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:18,478 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 15:54:18,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216930200] [2023-08-03 15:54:18,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216930200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196965493] [2023-08-03 15:54:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:18,484 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 15:54:18,513 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 15:54:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:18,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 15:54:18,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:18,615 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 15:54:18,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:54:18,695 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 15:54:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196965493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:54:18,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:54:18,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-03 15:54:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526742618] [2023-08-03 15:54:18,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:54:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 15:54:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 15:54:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-03 15:54:18,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 221 [2023-08-03 15:54:18,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 184 flow. Second operand has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 15:54:18,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:18,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 221 [2023-08-03 15:54:18,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:19,570 INFO L124 PetriNetUnfolderBase]: 1660/2900 cut-off events. [2023-08-03 15:54:19,570 INFO L125 PetriNetUnfolderBase]: For 3583/3607 co-relation queries the response was YES. [2023-08-03 15:54:19,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9160 conditions, 2900 events. 1660/2900 cut-off events. For 3583/3607 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17989 event pairs, 127 based on Foata normal form. 90/2842 useless extension candidates. Maximal degree in co-relation 8174. Up to 682 conditions per place. [2023-08-03 15:54:19,617 INFO L140 encePairwiseOnDemand]: 207/221 looper letters, 193 selfloop transitions, 65 changer transitions 12/274 dead transitions. [2023-08-03 15:54:19,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 274 transitions, 1809 flow [2023-08-03 15:54:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-03 15:54:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-03 15:54:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2486 transitions. [2023-08-03 15:54:19,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416624769565946 [2023-08-03 15:54:19,624 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2486 transitions. [2023-08-03 15:54:19,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2486 transitions. [2023-08-03 15:54:19,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:19,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2486 transitions. [2023-08-03 15:54:19,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.07407407407408) internal successors, (2486), 27 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states 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 15:54:19,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 221.0) internal successors, (6188), 28 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states 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 15:54:19,635 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 221.0) internal successors, (6188), 28 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states 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 15:54:19,635 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 184 flow. Second operand 27 states and 2486 transitions. [2023-08-03 15:54:19,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 274 transitions, 1809 flow [2023-08-03 15:54:19,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 274 transitions, 1789 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:54:19,642 INFO L231 Difference]: Finished difference. Result has 84 places, 103 transitions, 735 flow [2023-08-03 15:54:19,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=735, PETRI_PLACES=84, PETRI_TRANSITIONS=103} [2023-08-03 15:54:19,643 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-08-03 15:54:19,643 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 103 transitions, 735 flow [2023-08-03 15:54:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 15:54:19,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:19,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:19,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 15:54:19,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-03 15:54:19,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:19,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:19,850 INFO L85 PathProgramCache]: Analyzing trace with hash 932525320, now seen corresponding path program 1 times [2023-08-03 15:54:19,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:19,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66954866] [2023-08-03 15:54:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:19,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:19,946 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 15:54:19,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:19,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66954866] [2023-08-03 15:54:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66954866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:19,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:54:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708236506] [2023-08-03 15:54:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:19,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 15:54:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 15:54:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:54:19,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 221 [2023-08-03 15:54:19,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 103 transitions, 735 flow. Second operand has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 15:54:19,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:19,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 221 [2023-08-03 15:54:19,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:20,350 INFO L124 PetriNetUnfolderBase]: 2582/4418 cut-off events. [2023-08-03 15:54:20,350 INFO L125 PetriNetUnfolderBase]: For 18315/18321 co-relation queries the response was YES. [2023-08-03 15:54:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17672 conditions, 4418 events. 2582/4418 cut-off events. For 18315/18321 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28844 event pairs, 545 based on Foata normal form. 6/4319 useless extension candidates. Maximal degree in co-relation 15156. Up to 2396 conditions per place. [2023-08-03 15:54:20,373 INFO L140 encePairwiseOnDemand]: 212/221 looper letters, 158 selfloop transitions, 16 changer transitions 0/181 dead transitions. [2023-08-03 15:54:20,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 181 transitions, 1594 flow [2023-08-03 15:54:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 15:54:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 15:54:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 583 transitions. [2023-08-03 15:54:20,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396681749622926 [2023-08-03 15:54:20,375 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 583 transitions. [2023-08-03 15:54:20,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 583 transitions. [2023-08-03 15:54:20,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:20,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 583 transitions. [2023-08-03 15:54:20,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.16666666666667) internal successors, (583), 6 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 15:54:20,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 15:54:20,378 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 15:54:20,378 INFO L175 Difference]: Start difference. First operand has 84 places, 103 transitions, 735 flow. Second operand 6 states and 583 transitions. [2023-08-03 15:54:20,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 181 transitions, 1594 flow [2023-08-03 15:54:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 1457 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-03 15:54:20,432 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 713 flow [2023-08-03 15:54:20,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=713, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2023-08-03 15:54:20,432 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-08-03 15:54:20,432 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 713 flow [2023-08-03 15:54:20,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 15:54:20,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:20,433 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:20,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 15:54:20,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:20,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash 396393596, now seen corresponding path program 2 times [2023-08-03 15:54:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:20,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975251633] [2023-08-03 15:54:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:54:20,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:20,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975251633] [2023-08-03 15:54:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975251633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:20,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694927660] [2023-08-03 15:54:20,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 15:54:20,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:20,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:20,562 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 15:54:20,564 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 15:54:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 15:54:20,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:54:20,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 15:54:20,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:54:20,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:54:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:54:20,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694927660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:54:20,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:54:20,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-03 15:54:20,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398210799] [2023-08-03 15:54:20,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:54:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-03 15:54:20,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-03 15:54:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-03 15:54:21,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 221 [2023-08-03 15:54:21,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 713 flow. Second operand has 24 states, 24 states have (on average 85.66666666666667) internal successors, (2056), 24 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 15:54:21,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:21,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 221 [2023-08-03 15:54:21,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:23,145 INFO L124 PetriNetUnfolderBase]: 4990/8560 cut-off events. [2023-08-03 15:54:23,145 INFO L125 PetriNetUnfolderBase]: For 83063/83087 co-relation queries the response was YES. [2023-08-03 15:54:23,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33266 conditions, 8560 events. 4990/8560 cut-off events. For 83063/83087 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 60674 event pairs, 308 based on Foata normal form. 747/9148 useless extension candidates. Maximal degree in co-relation 32226. Up to 2164 conditions per place. [2023-08-03 15:54:23,189 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 360 selfloop transitions, 102 changer transitions 14/482 dead transitions. [2023-08-03 15:54:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 482 transitions, 3908 flow [2023-08-03 15:54:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-03 15:54:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-03 15:54:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3210 transitions. [2023-08-03 15:54:23,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42720255523023687 [2023-08-03 15:54:23,201 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3210 transitions. [2023-08-03 15:54:23,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3210 transitions. [2023-08-03 15:54:23,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:23,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3210 transitions. [2023-08-03 15:54:23,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 94.41176470588235) internal successors, (3210), 34 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states 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 15:54:23,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 221.0) internal successors, (7735), 35 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states 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 15:54:23,214 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 221.0) internal successors, (7735), 35 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states 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 15:54:23,214 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 713 flow. Second operand 34 states and 3210 transitions. [2023-08-03 15:54:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 482 transitions, 3908 flow [2023-08-03 15:54:23,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 482 transitions, 3884 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:54:23,305 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1674 flow [2023-08-03 15:54:23,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1674, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2023-08-03 15:54:23,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2023-08-03 15:54:23,306 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1674 flow [2023-08-03 15:54:23,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.66666666666667) internal successors, (2056), 24 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 15:54:23,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:23,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:23,322 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 15:54:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:23,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:23,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1156485263, now seen corresponding path program 1 times [2023-08-03 15:54:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728858784] [2023-08-03 15:54:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:23,585 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 15:54:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728858784] [2023-08-03 15:54:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728858784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618823100] [2023-08-03 15:54:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:23,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:23,587 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 15:54:23,618 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 15:54:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:23,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 15:54:23,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:23,710 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 15:54:23,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:54:23,781 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 15:54:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618823100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:54:23,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:54:23,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-03 15:54:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659394489] [2023-08-03 15:54:23,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:54:23,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 15:54:23,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 15:54:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-03 15:54:23,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 221 [2023-08-03 15:54:23,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1674 flow. Second operand has 16 states, 16 states have (on average 84.25) internal successors, (1348), 16 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states 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 15:54:23,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:23,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 221 [2023-08-03 15:54:23,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:25,450 INFO L124 PetriNetUnfolderBase]: 7112/12000 cut-off events. [2023-08-03 15:54:25,450 INFO L125 PetriNetUnfolderBase]: For 96886/96898 co-relation queries the response was YES. [2023-08-03 15:54:25,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50944 conditions, 12000 events. 7112/12000 cut-off events. For 96886/96898 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88573 event pairs, 862 based on Foata normal form. 90/11892 useless extension candidates. Maximal degree in co-relation 48960. Up to 4503 conditions per place. [2023-08-03 15:54:25,610 INFO L140 encePairwiseOnDemand]: 207/221 looper letters, 394 selfloop transitions, 119 changer transitions 12/533 dead transitions. [2023-08-03 15:54:25,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 533 transitions, 5834 flow [2023-08-03 15:54:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-03 15:54:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-03 15:54:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2474 transitions. [2023-08-03 15:54:25,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146137087313558 [2023-08-03 15:54:25,617 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2474 transitions. [2023-08-03 15:54:25,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2474 transitions. [2023-08-03 15:54:25,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:25,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2474 transitions. [2023-08-03 15:54:25,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 91.62962962962963) internal successors, (2474), 27 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states 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 15:54:25,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 221.0) internal successors, (6188), 28 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states 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 15:54:25,628 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 221.0) internal successors, (6188), 28 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states 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 15:54:25,628 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1674 flow. Second operand 27 states and 2474 transitions. [2023-08-03 15:54:25,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 533 transitions, 5834 flow [2023-08-03 15:54:25,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 533 transitions, 5140 flow, removed 303 selfloop flow, removed 6 redundant places. [2023-08-03 15:54:25,869 INFO L231 Difference]: Finished difference. Result has 173 places, 258 transitions, 2422 flow [2023-08-03 15:54:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2422, PETRI_PLACES=173, PETRI_TRANSITIONS=258} [2023-08-03 15:54:25,870 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2023-08-03 15:54:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 258 transitions, 2422 flow [2023-08-03 15:54:25,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.25) internal successors, (1348), 16 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states 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 15:54:25,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:25,871 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:25,876 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 15:54:26,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:26,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:26,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1376061256, now seen corresponding path program 2 times [2023-08-03 15:54:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:26,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652033772] [2023-08-03 15:54:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:26,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652033772] [2023-08-03 15:54:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652033772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897236607] [2023-08-03 15:54:26,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 15:54:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:26,201 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 15:54:26,203 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 15:54:26,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 15:54:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:54:26,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 15:54:26,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:26,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:54:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897236607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:26,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:54:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2023-08-03 15:54:26,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641044712] [2023-08-03 15:54:26,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 15:54:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 15:54:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-03 15:54:26,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 221 [2023-08-03 15:54:26,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 258 transitions, 2422 flow. Second operand has 10 states, 10 states have (on average 82.6) internal successors, (826), 10 states have internal predecessors, (826), 0 states have call successors, (0), 0 states 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 15:54:26,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:26,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 221 [2023-08-03 15:54:26,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:28,582 INFO L124 PetriNetUnfolderBase]: 8819/14561 cut-off events. [2023-08-03 15:54:28,583 INFO L125 PetriNetUnfolderBase]: For 150530/150563 co-relation queries the response was YES. [2023-08-03 15:54:28,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65752 conditions, 14561 events. 8819/14561 cut-off events. For 150530/150563 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 106054 event pairs, 1814 based on Foata normal form. 204/14746 useless extension candidates. Maximal degree in co-relation 63388. Up to 7291 conditions per place. [2023-08-03 15:54:28,695 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 342 selfloop transitions, 38 changer transitions 90/477 dead transitions. [2023-08-03 15:54:28,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 477 transitions, 5314 flow [2023-08-03 15:54:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 15:54:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 15:54:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1546 transitions. [2023-08-03 15:54:28,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114985360660101 [2023-08-03 15:54:28,698 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1546 transitions. [2023-08-03 15:54:28,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1546 transitions. [2023-08-03 15:54:28,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:28,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1546 transitions. [2023-08-03 15:54:28,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.94117647058823) internal successors, (1546), 17 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 15:54:28,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states 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 15:54:28,705 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states 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 15:54:28,705 INFO L175 Difference]: Start difference. First operand has 173 places, 258 transitions, 2422 flow. Second operand 17 states and 1546 transitions. [2023-08-03 15:54:28,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 477 transitions, 5314 flow [2023-08-03 15:54:29,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 477 transitions, 5171 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-08-03 15:54:29,132 INFO L231 Difference]: Finished difference. Result has 194 places, 218 transitions, 2093 flow [2023-08-03 15:54:29,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2093, PETRI_PLACES=194, PETRI_TRANSITIONS=218} [2023-08-03 15:54:29,133 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2023-08-03 15:54:29,133 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 218 transitions, 2093 flow [2023-08-03 15:54:29,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.6) internal successors, (826), 10 states have internal predecessors, (826), 0 states have call successors, (0), 0 states 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 15:54:29,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:29,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:29,155 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 15:54:29,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 15:54:29,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:29,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1365369526, now seen corresponding path program 1 times [2023-08-03 15:54:29,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:29,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832802100] [2023-08-03 15:54:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:54:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832802100] [2023-08-03 15:54:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832802100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 15:54:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766784477] [2023-08-03 15:54:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:54:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:54:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:54:29,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 221 [2023-08-03 15:54:29,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 218 transitions, 2093 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:54:29,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:29,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 221 [2023-08-03 15:54:29,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:29,929 INFO L124 PetriNetUnfolderBase]: 2204/3897 cut-off events. [2023-08-03 15:54:29,930 INFO L125 PetriNetUnfolderBase]: For 60580/60586 co-relation queries the response was YES. [2023-08-03 15:54:29,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19003 conditions, 3897 events. 2204/3897 cut-off events. For 60580/60586 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24985 event pairs, 1128 based on Foata normal form. 24/3921 useless extension candidates. Maximal degree in co-relation 18926. Up to 2455 conditions per place. [2023-08-03 15:54:29,959 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 149 selfloop transitions, 28 changer transitions 0/185 dead transitions. [2023-08-03 15:54:29,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 2043 flow [2023-08-03 15:54:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:54:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:54:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-03 15:54:29,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48265460030165913 [2023-08-03 15:54:29,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-03 15:54:29,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-03 15:54:29,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:29,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-03 15:54:29,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:54:29,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:29,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:54:29,962 INFO L175 Difference]: Start difference. First operand has 194 places, 218 transitions, 2093 flow. Second operand 3 states and 320 transitions. [2023-08-03 15:54:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 2043 flow [2023-08-03 15:54:30,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 185 transitions, 1747 flow, removed 100 selfloop flow, removed 30 redundant places. [2023-08-03 15:54:30,120 INFO L231 Difference]: Finished difference. Result has 146 places, 160 transitions, 1232 flow [2023-08-03 15:54:30,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1232, PETRI_PLACES=146, PETRI_TRANSITIONS=160} [2023-08-03 15:54:30,120 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2023-08-03 15:54:30,120 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 160 transitions, 1232 flow [2023-08-03 15:54:30,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:54:30,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:30,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 15:54:30,121 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:30,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1806867619, now seen corresponding path program 1 times [2023-08-03 15:54:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408123648] [2023-08-03 15:54:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:30,193 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 15:54:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408123648] [2023-08-03 15:54:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408123648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700716615] [2023-08-03 15:54:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:30,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:30,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:30,219 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 15:54:30,220 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 15:54:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:30,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 15:54:30,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:54:30,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:54:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700716615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:30,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:54:30,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 15:54:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863552241] [2023-08-03 15:54:30,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:30,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 15:54:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 15:54:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-03 15:54:30,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 221 [2023-08-03 15:54:30,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 160 transitions, 1232 flow. Second operand has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 15:54:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:30,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 221 [2023-08-03 15:54:30,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:30,910 INFO L124 PetriNetUnfolderBase]: 2614/4445 cut-off events. [2023-08-03 15:54:30,910 INFO L125 PetriNetUnfolderBase]: For 55743/55743 co-relation queries the response was YES. [2023-08-03 15:54:30,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19634 conditions, 4445 events. 2614/4445 cut-off events. For 55743/55743 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27662 event pairs, 422 based on Foata normal form. 69/4510 useless extension candidates. Maximal degree in co-relation 19577. Up to 2045 conditions per place. [2023-08-03 15:54:30,939 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 228 selfloop transitions, 12 changer transitions 1/246 dead transitions. [2023-08-03 15:54:30,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 246 transitions, 2540 flow [2023-08-03 15:54:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 15:54:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 15:54:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 806 transitions. [2023-08-03 15:54:30,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40522875816993464 [2023-08-03 15:54:30,941 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 806 transitions. [2023-08-03 15:54:30,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 806 transitions. [2023-08-03 15:54:30,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:30,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 806 transitions. [2023-08-03 15:54:30,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.55555555555556) internal successors, (806), 9 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 15:54:30,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 15:54:30,945 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 15:54:30,945 INFO L175 Difference]: Start difference. First operand has 146 places, 160 transitions, 1232 flow. Second operand 9 states and 806 transitions. [2023-08-03 15:54:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 246 transitions, 2540 flow [2023-08-03 15:54:31,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 246 transitions, 2499 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-03 15:54:31,040 INFO L231 Difference]: Finished difference. Result has 153 places, 162 transitions, 1241 flow [2023-08-03 15:54:31,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1241, PETRI_PLACES=153, PETRI_TRANSITIONS=162} [2023-08-03 15:54:31,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-08-03 15:54:31,041 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 162 transitions, 1241 flow [2023-08-03 15:54:31,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 15:54:31,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:31,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:31,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 15:54:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:31,246 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:31,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 887900687, now seen corresponding path program 1 times [2023-08-03 15:54:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642647936] [2023-08-03 15:54:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:31,341 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 15:54:31,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642647936] [2023-08-03 15:54:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642647936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:31,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:31,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 15:54:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73035483] [2023-08-03 15:54:31,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:31,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 15:54:31,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 15:54:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-03 15:54:31,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 221 [2023-08-03 15:54:31,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 162 transitions, 1241 flow. Second operand has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 15:54:31,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:31,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 221 [2023-08-03 15:54:31,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:31,962 INFO L124 PetriNetUnfolderBase]: 2714/4620 cut-off events. [2023-08-03 15:54:31,963 INFO L125 PetriNetUnfolderBase]: For 64574/64574 co-relation queries the response was YES. [2023-08-03 15:54:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20574 conditions, 4620 events. 2714/4620 cut-off events. For 64574/64574 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 29309 event pairs, 637 based on Foata normal form. 30/4646 useless extension candidates. Maximal degree in co-relation 20516. Up to 3587 conditions per place. [2023-08-03 15:54:31,991 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 194 selfloop transitions, 12 changer transitions 2/213 dead transitions. [2023-08-03 15:54:31,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 213 transitions, 2004 flow [2023-08-03 15:54:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 15:54:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 15:54:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 797 transitions. [2023-08-03 15:54:31,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007038712921066 [2023-08-03 15:54:31,993 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 797 transitions. [2023-08-03 15:54:31,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 797 transitions. [2023-08-03 15:54:31,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:31,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 797 transitions. [2023-08-03 15:54:31,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.55555555555556) internal successors, (797), 9 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 15:54:31,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 15:54:31,996 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 15:54:31,996 INFO L175 Difference]: Start difference. First operand has 153 places, 162 transitions, 1241 flow. Second operand 9 states and 797 transitions. [2023-08-03 15:54:31,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 213 transitions, 2004 flow [2023-08-03 15:54:32,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 213 transitions, 1984 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-03 15:54:32,123 INFO L231 Difference]: Finished difference. Result has 159 places, 163 transitions, 1263 flow [2023-08-03 15:54:32,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1263, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2023-08-03 15:54:32,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-03 15:54:32,124 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 1263 flow [2023-08-03 15:54:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 15:54:32,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:32,124 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:32,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 15:54:32,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:32,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash -890150788, now seen corresponding path program 3 times [2023-08-03 15:54:32,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:32,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476235463] [2023-08-03 15:54:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:32,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:54:32,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:32,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476235463] [2023-08-03 15:54:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476235463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:32,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309651123] [2023-08-03 15:54:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 15:54:32,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:32,317 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 15:54:32,318 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 15:54:32,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-03 15:54:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:54:32,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-03 15:54:32,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-03 15:54:32,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:54:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309651123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:32,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:54:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-08-03 15:54:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69563032] [2023-08-03 15:54:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 15:54:32,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 15:54:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-03 15:54:32,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 221 [2023-08-03 15:54:32,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 163 transitions, 1263 flow. Second operand has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 15:54:32,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:32,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 221 [2023-08-03 15:54:32,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:33,017 INFO L124 PetriNetUnfolderBase]: 2515/4329 cut-off events. [2023-08-03 15:54:33,018 INFO L125 PetriNetUnfolderBase]: For 52374/52374 co-relation queries the response was YES. [2023-08-03 15:54:33,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 4329 events. 2515/4329 cut-off events. For 52374/52374 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27898 event pairs, 270 based on Foata normal form. 94/4423 useless extension candidates. Maximal degree in co-relation 16445. Up to 3043 conditions per place. [2023-08-03 15:54:33,042 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 76 selfloop transitions, 14 changer transitions 127/220 dead transitions. [2023-08-03 15:54:33,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 1988 flow [2023-08-03 15:54:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 15:54:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 15:54:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 719 transitions. [2023-08-03 15:54:33,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066742081447964 [2023-08-03 15:54:33,043 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 719 transitions. [2023-08-03 15:54:33,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 719 transitions. [2023-08-03 15:54:33,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:33,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 719 transitions. [2023-08-03 15:54:33,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states 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 15:54:33,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 15:54:33,046 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 15:54:33,046 INFO L175 Difference]: Start difference. First operand has 159 places, 163 transitions, 1263 flow. Second operand 8 states and 719 transitions. [2023-08-03 15:54:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 1988 flow [2023-08-03 15:54:33,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 220 transitions, 1760 flow, removed 15 selfloop flow, removed 36 redundant places. [2023-08-03 15:54:33,087 INFO L231 Difference]: Finished difference. Result has 129 places, 60 transitions, 403 flow [2023-08-03 15:54:33,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=403, PETRI_PLACES=129, PETRI_TRANSITIONS=60} [2023-08-03 15:54:33,088 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2023-08-03 15:54:33,088 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 60 transitions, 403 flow [2023-08-03 15:54:33,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 15:54:33,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:33,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:33,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 15:54:33,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:33,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:33,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1414687284, now seen corresponding path program 1 times [2023-08-03 15:54:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271554583] [2023-08-03 15:54:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:33,415 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 15:54:33,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:33,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271554583] [2023-08-03 15:54:33,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271554583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:33,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423870157] [2023-08-03 15:54:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:33,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:33,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:33,429 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 15:54:33,429 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 15:54:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:33,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-03 15:54:33,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:33,522 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 15:54:33,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:54:33,602 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 15:54:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423870157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:54:33,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:54:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-03 15:54:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781451620] [2023-08-03 15:54:33,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:54:33,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 15:54:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 15:54:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-03 15:54:33,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 221 [2023-08-03 15:54:33,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 60 transitions, 403 flow. Second operand has 15 states, 15 states have (on average 83.8) internal successors, (1257), 15 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states 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 15:54:33,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:33,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 221 [2023-08-03 15:54:33,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:34,080 INFO L124 PetriNetUnfolderBase]: 1302/2200 cut-off events. [2023-08-03 15:54:34,081 INFO L125 PetriNetUnfolderBase]: For 10776/10776 co-relation queries the response was YES. [2023-08-03 15:54:34,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9113 conditions, 2200 events. 1302/2200 cut-off events. For 10776/10776 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10981 event pairs, 33 based on Foata normal form. 198/2398 useless extension candidates. Maximal degree in co-relation 9087. Up to 495 conditions per place. [2023-08-03 15:54:34,090 INFO L140 encePairwiseOnDemand]: 211/221 looper letters, 160 selfloop transitions, 17 changer transitions 0/180 dead transitions. [2023-08-03 15:54:34,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1456 flow [2023-08-03 15:54:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 15:54:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 15:54:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1205 transitions. [2023-08-03 15:54:34,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894634776987718 [2023-08-03 15:54:34,092 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1205 transitions. [2023-08-03 15:54:34,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1205 transitions. [2023-08-03 15:54:34,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:34,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1205 transitions. [2023-08-03 15:54:34,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.07142857142857) internal successors, (1205), 14 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states 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 15:54:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 221.0) internal successors, (3315), 15 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states 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 15:54:34,096 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 221.0) internal successors, (3315), 15 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states 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 15:54:34,096 INFO L175 Difference]: Start difference. First operand has 129 places, 60 transitions, 403 flow. Second operand 14 states and 1205 transitions. [2023-08-03 15:54:34,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1456 flow [2023-08-03 15:54:34,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1315 flow, removed 29 selfloop flow, removed 27 redundant places. [2023-08-03 15:54:34,130 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 378 flow [2023-08-03 15:54:34,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=378, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2023-08-03 15:54:34,130 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2023-08-03 15:54:34,130 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 378 flow [2023-08-03 15:54:34,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.8) internal successors, (1257), 15 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states 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 15:54:34,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:34,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:34,137 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 15:54:34,335 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,SelfDestructingSolverStorable15 [2023-08-03 15:54:34,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:34,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1566080781, now seen corresponding path program 2 times [2023-08-03 15:54:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621546754] [2023-08-03 15:54:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:34,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621546754] [2023-08-03 15:54:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621546754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:54:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165707061] [2023-08-03 15:54:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 15:54:34,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:54:34,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:54:34,490 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 15:54:34,492 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 15:54:34,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 15:54:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:54:34,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 15:54:34,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:54:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:34,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:54:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:34,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165707061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:54:34,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:54:34,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-03 15:54:34,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916919639] [2023-08-03 15:54:34,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:54:34,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 15:54:34,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 15:54:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-08-03 15:54:35,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 221 [2023-08-03 15:54:35,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 378 flow. Second operand has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states 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 15:54:35,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:35,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 221 [2023-08-03 15:54:35,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:36,416 INFO L124 PetriNetUnfolderBase]: 1962/3256 cut-off events. [2023-08-03 15:54:36,416 INFO L125 PetriNetUnfolderBase]: For 6023/6023 co-relation queries the response was YES. [2023-08-03 15:54:36,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11984 conditions, 3256 events. 1962/3256 cut-off events. For 6023/6023 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 16368 event pairs, 0 based on Foata normal form. 396/3652 useless extension candidates. Maximal degree in co-relation 11967. Up to 793 conditions per place. [2023-08-03 15:54:36,429 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 242 selfloop transitions, 28 changer transitions 0/273 dead transitions. [2023-08-03 15:54:36,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 273 transitions, 2049 flow [2023-08-03 15:54:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-03 15:54:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-03 15:54:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1809 transitions. [2023-08-03 15:54:36,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38978668390433097 [2023-08-03 15:54:36,431 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1809 transitions. [2023-08-03 15:54:36,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1809 transitions. [2023-08-03 15:54:36,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:36,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1809 transitions. [2023-08-03 15:54:36,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.14285714285714) internal successors, (1809), 21 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 15:54:36,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 221.0) internal successors, (4862), 22 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 15:54:36,437 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 221.0) internal successors, (4862), 22 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 15:54:36,437 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 378 flow. Second operand 21 states and 1809 transitions. [2023-08-03 15:54:36,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 273 transitions, 2049 flow [2023-08-03 15:54:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 273 transitions, 1998 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-03 15:54:36,447 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 445 flow [2023-08-03 15:54:36,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=445, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-08-03 15:54:36,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2023-08-03 15:54:36,448 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 445 flow [2023-08-03 15:54:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states 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 15:54:36,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:54:36,448 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:36,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 15:54:36,652 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,SelfDestructingSolverStorable16 [2023-08-03 15:54:36,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:54:36,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:54:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 33797805, now seen corresponding path program 3 times [2023-08-03 15:54:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:54:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335108881] [2023-08-03 15:54:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:54:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:54:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:54:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:54:36,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:54:36,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335108881] [2023-08-03 15:54:36,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335108881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:54:36,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:54:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-03 15:54:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621054619] [2023-08-03 15:54:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:54:36,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-03 15:54:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:54:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-03 15:54:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-08-03 15:54:36,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 221 [2023-08-03 15:54:36,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 86.85714285714286) internal successors, (1216), 14 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 15:54:36,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:54:36,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 221 [2023-08-03 15:54:36,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:54:37,188 INFO L124 PetriNetUnfolderBase]: 1891/3116 cut-off events. [2023-08-03 15:54:37,188 INFO L125 PetriNetUnfolderBase]: For 6483/6483 co-relation queries the response was YES. [2023-08-03 15:54:37,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12017 conditions, 3116 events. 1891/3116 cut-off events. For 6483/6483 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 15595 event pairs, 125 based on Foata normal form. 132/3247 useless extension candidates. Maximal degree in co-relation 11995. Up to 757 conditions per place. [2023-08-03 15:54:37,196 INFO L140 encePairwiseOnDemand]: 215/221 looper letters, 0 selfloop transitions, 0 changer transitions 249/249 dead transitions. [2023-08-03 15:54:37,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 249 transitions, 1882 flow [2023-08-03 15:54:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 15:54:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 15:54:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1357 transitions. [2023-08-03 15:54:37,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40935143288084463 [2023-08-03 15:54:37,198 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1357 transitions. [2023-08-03 15:54:37,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1357 transitions. [2023-08-03 15:54:37,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:54:37,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1357 transitions. [2023-08-03 15:54:37,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 90.46666666666667) internal successors, (1357), 15 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states 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 15:54:37,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 15:54:37,201 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 15:54:37,201 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 445 flow. Second operand 15 states and 1357 transitions. [2023-08-03 15:54:37,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 249 transitions, 1882 flow [2023-08-03 15:54:37,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 249 transitions, 1784 flow, removed 18 selfloop flow, removed 23 redundant places. [2023-08-03 15:54:37,215 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2023-08-03 15:54:37,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2023-08-03 15:54:37,216 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2023-08-03 15:54:37,216 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2023-08-03 15:54:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.85714285714286) internal successors, (1216), 14 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 15:54:37,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 15:54:37,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 15:54:37,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 15:54:37,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 15:54:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 15:54:37,217 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:54:37,219 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 15:54:37,219 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 15:54:37,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 03:54:37 BasicIcfg [2023-08-03 15:54:37,221 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 15:54:37,222 INFO L158 Benchmark]: Toolchain (without parser) took 26026.70ms. Allocated memory was 578.8MB in the beginning and 2.5GB in the end (delta: 1.9GB). Free memory was 541.9MB in the beginning and 905.8MB in the end (delta: -364.0MB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 400.6MB. Free memory is still 357.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.96ms. Allocated memory is still 578.8MB. Free memory was 541.9MB in the beginning and 513.3MB in the end (delta: 28.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.62ms. Allocated memory is still 578.8MB. Free memory was 513.3MB in the beginning and 511.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: Boogie Preprocessor took 15.96ms. Allocated memory is still 578.8MB. Free memory was 511.2MB in the beginning and 509.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: RCFGBuilder took 308.88ms. Allocated memory is still 578.8MB. Free memory was 509.6MB in the beginning and 494.4MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-03 15:54:37,222 INFO L158 Benchmark]: TraceAbstraction took 25238.36ms. Allocated memory was 578.8MB in the beginning and 2.5GB in the end (delta: 1.9GB). Free memory was 494.0MB in the beginning and 905.8MB in the end (delta: -411.9MB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. [2023-08-03 15:54:37,223 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 400.6MB. Free memory is still 357.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 413.96ms. Allocated memory is still 578.8MB. Free memory was 541.9MB in the beginning and 513.3MB in the end (delta: 28.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.62ms. Allocated memory is still 578.8MB. Free memory was 513.3MB in the beginning and 511.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.96ms. Allocated memory is still 578.8MB. Free memory was 511.2MB in the beginning and 509.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 308.88ms. Allocated memory is still 578.8MB. Free memory was 509.6MB in the beginning and 494.4MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 25238.36ms. Allocated memory was 578.8MB in the beginning and 2.5GB in the end (delta: 1.9GB). Free memory was 494.0MB in the beginning and 905.8MB in the end (delta: -411.9MB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 77 PlacesBefore, 12 PlacesAfterwards, 80 TransitionsBefore, 10 TransitionsAfterwards, 1054 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 5 ChoiceCompositions, 85 TotalNumberOfCompositions, 863 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 814, independent: 803, independent conditional: 0, independent unconditional: 803, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 561, independent: 557, independent conditional: 0, independent unconditional: 557, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 814, independent: 246, independent conditional: 0, independent unconditional: 246, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 561, unknown conditional: 0, unknown unconditional: 561] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 107 PlacesBefore, 29 PlacesAfterwards, 112 TransitionsBefore, 28 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 13 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, 6987 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4682, independent: 4497, independent conditional: 0, independent unconditional: 4497, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2149, independent: 2118, independent conditional: 0, independent unconditional: 2118, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4682, independent: 2379, independent conditional: 0, independent unconditional: 2379, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 2149, unknown conditional: 0, unknown unconditional: 2149] , Statistics on independence cache: Total cache size (in pairs): 135, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 998]: 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 3 procedures, 103 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: 3.1s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65 IncrementalHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 65 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=1, InterpolantAutomatonStates: 4, 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, 0.3s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 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 4 procedures, 131 locations, 4 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: 22.1s, OverallIterations: 16, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3929 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3587 mSDsluCounter, 1873 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1796 mSDsCounter, 226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11414 IncrementalHoareTripleChecker+Invalid, 11640 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 226 mSolverCounterUnsat, 77 mSDtfsCounter, 11414 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 427 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2422occurred in iteration=8, InterpolantAutomatonStates: 207, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 419 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 474 ConstructedInterpolants, 0 QuantifiedInterpolants, 2973 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1360 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 211/306 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 15:54:37,236 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 Received shutdown request...