/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:57:28,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:57:28,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:57:28,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:57:28,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:57:28,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:57:28,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:57:28,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:57:28,681 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:57:28,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:57:28,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:57:28,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:57:28,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:57:28,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:57:28,688 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:57:28,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:57:28,689 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:57:28,689 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:57:28,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:57:28,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:57:28,690 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:57:28,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:57:28,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:57:28,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:57:28,692 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:57:28,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:57:28,692 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:57:28,693 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:57:28,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:57:28,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:57:28,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:57:28,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:57:28,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:57:28,695 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:57:28,695 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:57:28,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:57:28,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:57:28,696 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:57:28,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:57:28,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:57:28,696 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:57:28,697 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:57:28,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:57:28,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:57:28,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:57:28,967 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:57:28,967 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:57:28,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i [2023-08-04 07:57:30,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:57:30,434 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:57:30,435 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i [2023-08-04 07:57:30,452 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31314abfc/6e0da5f7a56749fe9026b2384beedce8/FLAGa0e71e2ce [2023-08-04 07:57:30,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31314abfc/6e0da5f7a56749fe9026b2384beedce8 [2023-08-04 07:57:30,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:57:30,472 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:57:30,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:57:30,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:57:30,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:57:30,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:57:30" (1/1) ... [2023-08-04 07:57:30,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28eabfcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:30, skipping insertion in model container [2023-08-04 07:57:30,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:57:30" (1/1) ... [2023-08-04 07:57:30,525 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:57:30,966 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i[42166,42179] [2023-08-04 07:57:30,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:57:30,985 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:57:30,997 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [133] [2023-08-04 07:57:31,008 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [495] [2023-08-04 07:57:31,008 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [495] [2023-08-04 07:57:31,020 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_sync01_bound2.i[42166,42179] [2023-08-04 07:57:31,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:57:31,065 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:57:31,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31 WrapperNode [2023-08-04 07:57:31,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:57:31,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:57:31,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:57:31,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:57:31,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,090 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,116 INFO L138 Inliner]: procedures = 268, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 105 [2023-08-04 07:57:31,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:57:31,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:57:31,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:57:31,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:57:31,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,136 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:57:31,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:57:31,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:57:31,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:57:31,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (1/1) ... [2023-08-04 07:57:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:57:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:31,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:57:31,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:57:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:57:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 07:57:31,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 07:57:31,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:57:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:57:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:57:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:57:31,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:57:31,242 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:57:31,350 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:57:31,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:57:31,531 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:57:31,539 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:57:31,539 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:57:31,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:57:31 BoogieIcfgContainer [2023-08-04 07:57:31,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:57:31,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:57:31,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:57:31,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:57:31,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:57:30" (1/3) ... [2023-08-04 07:57:31,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b2997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:57:31, skipping insertion in model container [2023-08-04 07:57:31,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:57:31" (2/3) ... [2023-08-04 07:57:31,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b2997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:57:31, skipping insertion in model container [2023-08-04 07:57:31,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:57:31" (3/3) ... [2023-08-04 07:57:31,549 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_sync01_bound2.i [2023-08-04 07:57:31,556 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:57:31,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:57:31,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:57:31,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:57:31,627 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:57:31,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,737 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-04 07:57:31,737 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:57:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-04 07:57:31,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,755 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:57:31,763 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:31,813 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-04 07:57:31,813 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:57:31,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-04 07:57:31,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-04 07:57:35,961 INFO L134 LiptonReduction]: Checked pairs total: 9588 [2023-08-04 07:57:35,961 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 07:57:35,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:57:35,978 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;@1e075f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:57:35,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:57:35,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:57:35,984 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:57:35,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:57:35,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:35,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:57:35,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:35,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash 466129893, now seen corresponding path program 1 times [2023-08-04 07:57:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396240180] [2023-08-04 07:57:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:57:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:36,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396240180] [2023-08-04 07:57:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396240180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:36,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:57:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:57:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537056923] [2023-08-04 07:57:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:36,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:57:36,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 07:57:36,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:36,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 07:57:36,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:36,406 INFO L124 PetriNetUnfolderBase]: 372/736 cut-off events. [2023-08-04 07:57:36,406 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-04 07:57:36,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 736 events. 372/736 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3768 event pairs, 120 based on Foata normal form. 93/673 useless extension candidates. Maximal degree in co-relation 1188. Up to 604 conditions per place. [2023-08-04 07:57:36,416 INFO L140 encePairwiseOnDemand]: 232/237 looper letters, 29 selfloop transitions, 2 changer transitions 4/45 dead transitions. [2023-08-04 07:57:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2023-08-04 07:57:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 07:57:36,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372714486638537 [2023-08-04 07:57:36,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:36,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,459 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 106 flow. Second operand 3 states and 382 transitions. [2023-08-04 07:57:36,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2023-08-04 07:57:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:57:36,466 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 100 flow [2023-08-04 07:57:36,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 07:57:36,473 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 07:57:36,474 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 100 flow [2023-08-04 07:57:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:36,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:57:36,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:36,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1898006330, now seen corresponding path program 1 times [2023-08-04 07:57:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261364653] [2023-08-04 07:57:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:57:36,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261364653] [2023-08-04 07:57:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261364653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983681377] [2023-08-04 07:57:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:36,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:36,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:36,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:57:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:36,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:36,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:57:36,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983681377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:36,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:36,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:57:36,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130218204] [2023-08-04 07:57:36,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:36,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:36,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 07:57:36,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:36,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 07:57:36,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:36,883 INFO L124 PetriNetUnfolderBase]: 328/587 cut-off events. [2023-08-04 07:57:36,883 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 07:57:36,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 587 events. 328/587 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2406 event pairs, 174 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 1134. Up to 490 conditions per place. [2023-08-04 07:57:36,887 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 33 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 07:57:36,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 190 flow [2023-08-04 07:57:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 07:57:36,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372714486638537 [2023-08-04 07:57:36,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:36,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 07:57:36,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,898 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 100 flow. Second operand 3 states and 382 transitions. [2023-08-04 07:57:36,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 190 flow [2023-08-04 07:57:36,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 07:57:36,900 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 98 flow [2023-08-04 07:57:36,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-04 07:57:36,901 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-04 07:57:36,901 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 98 flow [2023-08-04 07:57:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:36,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:36,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:36,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:57:37,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:37,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:37,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash 428211769, now seen corresponding path program 1 times [2023-08-04 07:57:37,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:37,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783172009] [2023-08-04 07:57:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:37,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:57:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783172009] [2023-08-04 07:57:37,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783172009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425162679] [2023-08-04 07:57:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:37,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:37,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:57:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:37,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:37,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:37,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425162679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:37,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:57:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431219123] [2023-08-04 07:57:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:37,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 07:57:37,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:37,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 07:57:37,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:37,375 INFO L124 PetriNetUnfolderBase]: 216/431 cut-off events. [2023-08-04 07:57:37,375 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 07:57:37,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 431 events. 216/431 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1740 event pairs, 102 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 404. Up to 262 conditions per place. [2023-08-04 07:57:37,377 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 07:57:37,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 204 flow [2023-08-04 07:57:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 07:57:37,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414908579465542 [2023-08-04 07:57:37,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 07:57:37,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 07:57:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:37,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 07:57:37,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,382 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 98 flow. Second operand 3 states and 385 transitions. [2023-08-04 07:57:37,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 204 flow [2023-08-04 07:57:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:57:37,384 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 106 flow [2023-08-04 07:57:37,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-04 07:57:37,386 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-04 07:57:37,386 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 106 flow [2023-08-04 07:57:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:37,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:37,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:37,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:57:37,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:37,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1042697457, now seen corresponding path program 1 times [2023-08-04 07:57:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:37,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382671688] [2023-08-04 07:57:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382671688] [2023-08-04 07:57:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382671688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:37,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:57:37,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:57:37,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161789309] [2023-08-04 07:57:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:57:37,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 237 [2023-08-04 07:57:37,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:37,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 237 [2023-08-04 07:57:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:37,761 INFO L124 PetriNetUnfolderBase]: 151/319 cut-off events. [2023-08-04 07:57:37,762 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-04 07:57:37,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 319 events. 151/319 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 985 event pairs, 62 based on Foata normal form. 25/330 useless extension candidates. Maximal degree in co-relation 487. Up to 214 conditions per place. [2023-08-04 07:57:37,764 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 31 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 07:57:37,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 186 flow [2023-08-04 07:57:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 07:57:37,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175808720112518 [2023-08-04 07:57:37,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 07:57:37,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 07:57:37,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:37,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 07:57:37,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,769 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 106 flow. Second operand 3 states and 368 transitions. [2023-08-04 07:57:37,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 186 flow [2023-08-04 07:57:37,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:57:37,771 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 106 flow [2023-08-04 07:57:37,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-04 07:57:37,772 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-04 07:57:37,772 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 106 flow [2023-08-04 07:57:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:37,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:57:37,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:37,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1122194504, now seen corresponding path program 1 times [2023-08-04 07:57:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:37,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822896492] [2023-08-04 07:57:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822896492] [2023-08-04 07:57:37,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822896492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682770192] [2023-08-04 07:57:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:37,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:37,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:37,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:57:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:37,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:37,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:37,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682770192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:37,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:37,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:57:37,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368133764] [2023-08-04 07:57:37,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:37,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:37,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 07:57:37,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:37,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:37,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 07:57:37,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:38,022 INFO L124 PetriNetUnfolderBase]: 126/269 cut-off events. [2023-08-04 07:57:38,022 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 07:57:38,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 269 events. 126/269 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 813 event pairs, 87 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 394. Up to 212 conditions per place. [2023-08-04 07:57:38,024 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 29 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-04 07:57:38,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 184 flow [2023-08-04 07:57:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 07:57:38,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-08-04 07:57:38,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 07:57:38,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 07:57:38,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:38,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 07:57:38,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,029 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 106 flow. Second operand 3 states and 378 transitions. [2023-08-04 07:57:38,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 184 flow [2023-08-04 07:57:38,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:57:38,031 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 106 flow [2023-08-04 07:57:38,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-04 07:57:38,032 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 07:57:38,032 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 106 flow [2023-08-04 07:57:38,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:38,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:38,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:38,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:38,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1437160790, now seen corresponding path program 1 times [2023-08-04 07:57:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:38,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247109280] [2023-08-04 07:57:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:38,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:38,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247109280] [2023-08-04 07:57:38,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247109280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:38,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208248986] [2023-08-04 07:57:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:38,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:38,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:57:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:38,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:57:38,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:38,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:57:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:38,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208248986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:57:38,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:57:38,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:57:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024686369] [2023-08-04 07:57:38,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:57:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:57:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:57:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:38,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:57:38,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 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) [2023-08-04 07:57:38,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:38,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:57:38,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:38,524 INFO L124 PetriNetUnfolderBase]: 5/15 cut-off events. [2023-08-04 07:57:38,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:57:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 15 events. 5/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 2/16 useless extension candidates. Maximal degree in co-relation 31. Up to 8 conditions per place. [2023-08-04 07:57:38,525 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:57:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 11 transitions, 45 flow [2023-08-04 07:57:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:57:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:57:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-04 07:57:38,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49156118143459915 [2023-08-04 07:57:38,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-04 07:57:38,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-04 07:57:38,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:38,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-04 07:57:38,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:38,531 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 106 flow. Second operand 4 states and 466 transitions. [2023-08-04 07:57:38,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 11 transitions, 45 flow [2023-08-04 07:57:38,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:57:38,533 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-04 07:57:38,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-04 07:57:38,536 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -22 predicate places. [2023-08-04 07:57:38,536 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-04 07:57:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 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) [2023-08-04 07:57:38,540 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:57:38,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:57:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:38,746 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 07:57:38,747 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:57:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,779 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-04 07:57:38,779 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:57:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-04 07:57:38,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:57:38,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 133 transitions, 288 flow [2023-08-04 07:57:38,808 INFO L124 PetriNetUnfolderBase]: 32/266 cut-off events. [2023-08-04 07:57:38,808 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:57:38,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 266 events. 32/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2023-08-04 07:57:38,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-04 07:57:42,320 INFO L134 LiptonReduction]: Checked pairs total: 8724 [2023-08-04 07:57:42,320 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 07:57:42,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:57:42,322 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;@1e075f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:57:42,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:57:42,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:57:42,326 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 07:57:42,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:57:42,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:42,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:57:42,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:57:42,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:42,326 INFO L85 PathProgramCache]: Analyzing trace with hash 360460087, now seen corresponding path program 1 times [2023-08-04 07:57:42,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352174500] [2023-08-04 07:57:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:42,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:57:42,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:57:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:57:42,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:57:42,385 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:57:42,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:57:42,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:57:42,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:57:42,386 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:57:42,386 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:57:42,387 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:57:42,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:57:42,421 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:57:42,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,496 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-04 07:57:42,496 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 07:57:42,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4287 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 07:57:42,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:57:42,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:57:42,573 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-04 07:57:42,573 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 07:57:42,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4287 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 07:57:42,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 9420 [2023-08-04 07:57:46,279 INFO L134 LiptonReduction]: Checked pairs total: 29202 [2023-08-04 07:57:46,280 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 07:57:46,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:57:46,282 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;@1e075f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:57:46,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:57:46,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:57:46,284 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:57:46,284 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:57:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:57:46,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 871587319, now seen corresponding path program 1 times [2023-08-04 07:57:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458969432] [2023-08-04 07:57:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:57:46,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:46,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458969432] [2023-08-04 07:57:46,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458969432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:46,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:57:46,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:57:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602215690] [2023-08-04 07:57:46,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:46,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:57:46,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-04 07:57:46,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:46,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:46,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-04 07:57:46,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:48,696 INFO L124 PetriNetUnfolderBase]: 18932/28305 cut-off events. [2023-08-04 07:57:48,696 INFO L125 PetriNetUnfolderBase]: For 1964/1964 co-relation queries the response was YES. [2023-08-04 07:57:48,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54431 conditions, 28305 events. 18932/28305 cut-off events. For 1964/1964 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 192546 event pairs, 9956 based on Foata normal form. 4613/28951 useless extension candidates. Maximal degree in co-relation 14014. Up to 24716 conditions per place. [2023-08-04 07:57:48,875 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 45 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2023-08-04 07:57:48,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 284 flow [2023-08-04 07:57:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-04 07:57:48,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2023-08-04 07:57:48,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-04 07:57:48,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-04 07:57:48,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:48,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-04 07:57:48,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:48,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:48,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:48,881 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 184 flow. Second operand 3 states and 483 transitions. [2023-08-04 07:57:48,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 284 flow [2023-08-04 07:57:48,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:57:48,887 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 174 flow [2023-08-04 07:57:48,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-04 07:57:48,888 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-04 07:57:48,889 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 174 flow [2023-08-04 07:57:48,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:48,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:48,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:48,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 07:57:48,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:48,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:48,890 INFO L85 PathProgramCache]: Analyzing trace with hash -773020547, now seen corresponding path program 1 times [2023-08-04 07:57:48,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:48,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103397970] [2023-08-04 07:57:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:48,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:57:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103397970] [2023-08-04 07:57:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103397970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479218275] [2023-08-04 07:57:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:48,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:48,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:48,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:57:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:49,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:49,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:57:49,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479218275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:57:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634853630] [2023-08-04 07:57:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:49,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-04 07:57:49,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:49,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:49,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-04 07:57:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:50,469 INFO L124 PetriNetUnfolderBase]: 16912/24503 cut-off events. [2023-08-04 07:57:50,469 INFO L125 PetriNetUnfolderBase]: For 1666/1666 co-relation queries the response was YES. [2023-08-04 07:57:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47927 conditions, 24503 events. 16912/24503 cut-off events. For 1666/1666 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 156097 event pairs, 10820 based on Foata normal form. 0/21685 useless extension candidates. Maximal degree in co-relation 47881. Up to 21722 conditions per place. [2023-08-04 07:57:50,631 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 07:57:50,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 314 flow [2023-08-04 07:57:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-04 07:57:50,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632984901277585 [2023-08-04 07:57:50,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-04 07:57:50,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-04 07:57:50,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:50,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-04 07:57:50,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:50,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:50,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:50,637 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 174 flow. Second operand 3 states and 485 transitions. [2023-08-04 07:57:50,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 314 flow [2023-08-04 07:57:50,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:57:50,646 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 178 flow [2023-08-04 07:57:50,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-08-04 07:57:50,647 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 07:57:50,647 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 178 flow [2023-08-04 07:57:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:50,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:50,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:50,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:50,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:50,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1847833029, now seen corresponding path program 1 times [2023-08-04 07:57:50,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:50,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26684170] [2023-08-04 07:57:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:57:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26684170] [2023-08-04 07:57:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26684170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905791308] [2023-08-04 07:57:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:50,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:50,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:57:50,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 07:57:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:51,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:51,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:51,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:51,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905791308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:51,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:51,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:57:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352683839] [2023-08-04 07:57:51,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-04 07:57:51,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:51,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:51,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-04 07:57:51,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:52,266 INFO L124 PetriNetUnfolderBase]: 13776/20035 cut-off events. [2023-08-04 07:57:52,266 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-04 07:57:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40336 conditions, 20035 events. 13776/20035 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 123370 event pairs, 7032 based on Foata normal form. 0/18481 useless extension candidates. Maximal degree in co-relation 18764. Up to 13318 conditions per place. [2023-08-04 07:57:52,483 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 63 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 07:57:52,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 362 flow [2023-08-04 07:57:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-04 07:57:52,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725900116144018 [2023-08-04 07:57:52,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-04 07:57:52,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-04 07:57:52,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:52,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-04 07:57:52,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:52,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:52,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:52,488 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 178 flow. Second operand 3 states and 493 transitions. [2023-08-04 07:57:52,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 362 flow [2023-08-04 07:57:52,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:57:52,492 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 188 flow [2023-08-04 07:57:52,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-08-04 07:57:52,493 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 07:57:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 188 flow [2023-08-04 07:57:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:52,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:52,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:52,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:52,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:52,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:52,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash -481595236, now seen corresponding path program 1 times [2023-08-04 07:57:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:52,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025574602] [2023-08-04 07:57:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025574602] [2023-08-04 07:57:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025574602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:52,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:57:52,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:57:52,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449217766] [2023-08-04 07:57:52,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:52,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:52,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:52,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:57:52,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 287 [2023-08-04 07:57:52,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:52,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:52,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 287 [2023-08-04 07:57:52,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:54,356 INFO L124 PetriNetUnfolderBase]: 19086/27715 cut-off events. [2023-08-04 07:57:54,356 INFO L125 PetriNetUnfolderBase]: For 6086/6086 co-relation queries the response was YES. [2023-08-04 07:57:54,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58324 conditions, 27715 events. 19086/27715 cut-off events. For 6086/6086 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 172340 event pairs, 8807 based on Foata normal form. 325/27293 useless extension candidates. Maximal degree in co-relation 42126. Up to 25010 conditions per place. [2023-08-04 07:57:54,500 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 59 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 07:57:54,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 353 flow [2023-08-04 07:57:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-04 07:57:54,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423925667828107 [2023-08-04 07:57:54,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-04 07:57:54,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-04 07:57:54,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:54,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-04 07:57:54,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:54,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:54,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:54,506 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 188 flow. Second operand 3 states and 467 transitions. [2023-08-04 07:57:54,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 353 flow [2023-08-04 07:57:54,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:57:54,521 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 211 flow [2023-08-04 07:57:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-08-04 07:57:54,522 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 07:57:54,522 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 211 flow [2023-08-04 07:57:54,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:54,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:54,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 07:57:54,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:54,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1240954627, now seen corresponding path program 1 times [2023-08-04 07:57:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337563906] [2023-08-04 07:57:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:57:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337563906] [2023-08-04 07:57:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337563906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219566189] [2023-08-04 07:57:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:54,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:54,565 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) [2023-08-04 07:57:54,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 07:57:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:54,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:57:54,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:54,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:57:54,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219566189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:57:54,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:57:54,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:57:54,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440694963] [2023-08-04 07:57:54,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:57:54,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:57:54,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:57:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:54,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-04 07:57:54,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:54,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:54,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-04 07:57:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:56,013 INFO L124 PetriNetUnfolderBase]: 13993/20819 cut-off events. [2023-08-04 07:57:56,013 INFO L125 PetriNetUnfolderBase]: For 4795/5450 co-relation queries the response was YES. [2023-08-04 07:57:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 20819 events. 13993/20819 cut-off events. For 4795/5450 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 134097 event pairs, 7949 based on Foata normal form. 0/19590 useless extension candidates. Maximal degree in co-relation 32661. Up to 15203 conditions per place. [2023-08-04 07:57:56,118 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 66 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 07:57:56,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 405 flow [2023-08-04 07:57:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:57:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:57:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-04 07:57:56,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725900116144018 [2023-08-04 07:57:56,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-04 07:57:56,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-04 07:57:56,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:56,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-04 07:57:56,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:56,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:56,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:56,125 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 211 flow. Second operand 3 states and 493 transitions. [2023-08-04 07:57:56,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 405 flow [2023-08-04 07:57:56,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:57:56,140 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 220 flow [2023-08-04 07:57:56,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-04 07:57:56,141 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 07:57:56,141 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 220 flow [2023-08-04 07:57:56,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:56,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:56,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:56,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:56,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:56,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:56,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 298778202, now seen corresponding path program 1 times [2023-08-04 07:57:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082425134] [2023-08-04 07:57:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:56,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082425134] [2023-08-04 07:57:56,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082425134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070321593] [2023-08-04 07:57:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:56,429 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) [2023-08-04 07:57:56,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:57:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:56,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:57:56,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:56,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:57:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:57:56,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070321593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:57:56,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:57:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:57:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301987024] [2023-08-04 07:57:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:57:56,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:57:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:57:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:56,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:57:56,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:56,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:56,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:57:56,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:57,909 INFO L124 PetriNetUnfolderBase]: 12876/19027 cut-off events. [2023-08-04 07:57:57,909 INFO L125 PetriNetUnfolderBase]: For 4786/5406 co-relation queries the response was YES. [2023-08-04 07:57:57,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42412 conditions, 19027 events. 12876/19027 cut-off events. For 4786/5406 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 120378 event pairs, 7364 based on Foata normal form. 2/18118 useless extension candidates. Maximal degree in co-relation 29958. Up to 17447 conditions per place. [2023-08-04 07:57:58,011 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 51 selfloop transitions, 3 changer transitions 1/75 dead transitions. [2023-08-04 07:57:58,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 346 flow [2023-08-04 07:57:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:57:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:57:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 07:57:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539198606271777 [2023-08-04 07:57:58,014 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 07:57:58,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 07:57:58,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:58,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 07:57:58,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:58,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:58,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:58,018 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 220 flow. Second operand 4 states and 619 transitions. [2023-08-04 07:57:58,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 346 flow [2023-08-04 07:57:58,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:57:58,120 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 232 flow [2023-08-04 07:57:58,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-04 07:57:58,121 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 07:57:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 232 flow [2023-08-04 07:57:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:58,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:58,122 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:58,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 07:57:58,322 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,SelfDestructingSolverStorable12 [2023-08-04 07:57:58,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:57:58,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:57:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1957563399, now seen corresponding path program 1 times [2023-08-04 07:57:58,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:57:58,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686192351] [2023-08-04 07:57:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:58,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:57:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:57:58,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:57:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686192351] [2023-08-04 07:57:58,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686192351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:57:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746313904] [2023-08-04 07:57:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:57:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:57:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:57:58,406 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) [2023-08-04 07:57:58,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 07:57:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:57:58,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:57:58,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:57:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:57:58,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:57:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:57:58,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746313904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:57:58,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:57:58,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:57:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388453724] [2023-08-04 07:57:58,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:57:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:57:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:57:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:57:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:57:58,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:57:58,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:58,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:57:58,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:57:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:57:59,753 INFO L124 PetriNetUnfolderBase]: 12747/18558 cut-off events. [2023-08-04 07:57:59,753 INFO L125 PetriNetUnfolderBase]: For 3156/4229 co-relation queries the response was YES. [2023-08-04 07:57:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41184 conditions, 18558 events. 12747/18558 cut-off events. For 3156/4229 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 113220 event pairs, 2159 based on Foata normal form. 44/17941 useless extension candidates. Maximal degree in co-relation 33793. Up to 14483 conditions per place. [2023-08-04 07:57:59,862 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 74 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-04 07:57:59,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 460 flow [2023-08-04 07:57:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:57:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:57:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-04 07:57:59,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2023-08-04 07:57:59,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-04 07:57:59,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-04 07:57:59,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:57:59,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-04 07:57:59,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:59,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:59,868 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:59,868 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 232 flow. Second operand 4 states and 640 transitions. [2023-08-04 07:57:59,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 460 flow [2023-08-04 07:57:59,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 451 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:57:59,948 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 243 flow [2023-08-04 07:57:59,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-08-04 07:57:59,949 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-04 07:57:59,949 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 243 flow [2023-08-04 07:57:59,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:57:59,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:57:59,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:57:59,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:00,171 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,SelfDestructingSolverStorable13 [2023-08-04 07:58:00,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:00,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1371287500, now seen corresponding path program 1 times [2023-08-04 07:58:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:00,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371932937] [2023-08-04 07:58:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371932937] [2023-08-04 07:58:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371932937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:58:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109951028] [2023-08-04 07:58:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:58:00,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-04 07:58:00,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:00,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:00,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-04 07:58:00,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:01,043 INFO L124 PetriNetUnfolderBase]: 5353/12044 cut-off events. [2023-08-04 07:58:01,043 INFO L125 PetriNetUnfolderBase]: For 5698/5698 co-relation queries the response was YES. [2023-08-04 07:58:01,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25908 conditions, 12044 events. 5353/12044 cut-off events. For 5698/5698 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 108867 event pairs, 1884 based on Foata normal form. 2332/14337 useless extension candidates. Maximal degree in co-relation 16140. Up to 5259 conditions per place. [2023-08-04 07:58:01,091 INFO L140 encePairwiseOnDemand]: 271/287 looper letters, 62 selfloop transitions, 16 changer transitions 2/96 dead transitions. [2023-08-04 07:58:01,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 542 flow [2023-08-04 07:58:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-04 07:58:01,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537746806039489 [2023-08-04 07:58:01,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-04 07:58:01,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-04 07:58:01,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:01,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-04 07:58:01,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,096 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 243 flow. Second operand 3 states and 463 transitions. [2023-08-04 07:58:01,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 542 flow [2023-08-04 07:58:01,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 534 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:01,117 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 265 flow [2023-08-04 07:58:01,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-08-04 07:58:01,118 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2023-08-04 07:58:01,118 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 265 flow [2023-08-04 07:58:01,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:01,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:01,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:58:01,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:01,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1193551694, now seen corresponding path program 2 times [2023-08-04 07:58:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:01,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860365057] [2023-08-04 07:58:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:01,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:58:01,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:01,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860365057] [2023-08-04 07:58:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860365057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:01,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167741215] [2023-08-04 07:58:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:58:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:01,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:01,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:01,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 07:58:01,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:58:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:58:01,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:58:01,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:58:01,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:58:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167741215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:01,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:01,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:58:01,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788630184] [2023-08-04 07:58:01,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:01,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:01,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:58:01,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:01,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:58:01,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:01,850 INFO L124 PetriNetUnfolderBase]: 3199/6210 cut-off events. [2023-08-04 07:58:01,850 INFO L125 PetriNetUnfolderBase]: For 4497/4688 co-relation queries the response was YES. [2023-08-04 07:58:01,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16524 conditions, 6210 events. 3199/6210 cut-off events. For 4497/4688 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 44895 event pairs, 779 based on Foata normal form. 228/6379 useless extension candidates. Maximal degree in co-relation 14152. Up to 2026 conditions per place. [2023-08-04 07:58:01,878 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 83 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-04 07:58:01,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 588 flow [2023-08-04 07:58:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-04 07:58:01,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653310104529616 [2023-08-04 07:58:01,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-04 07:58:01,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-04 07:58:01,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:01,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-04 07:58:01,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,883 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 265 flow. Second operand 4 states and 649 transitions. [2023-08-04 07:58:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 588 flow [2023-08-04 07:58:01,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 542 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:58:01,902 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 264 flow [2023-08-04 07:58:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-04 07:58:01,902 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2023-08-04 07:58:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 264 flow [2023-08-04 07:58:01,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:01,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:01,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:01,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:02,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 07:58:02,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:02,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:02,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1929258382, now seen corresponding path program 1 times [2023-08-04 07:58:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:02,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672640817] [2023-08-04 07:58:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:58:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672640817] [2023-08-04 07:58:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672640817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509506099] [2023-08-04 07:58:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:02,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:02,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:58:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:02,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 07:58:02,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:58:02,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:58:02,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509506099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:02,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:02,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 8 [2023-08-04 07:58:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932765679] [2023-08-04 07:58:02,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 07:58:02,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 07:58:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-04 07:58:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2023-08-04 07:58:02,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 264 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:02,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:02,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2023-08-04 07:58:02,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:03,902 INFO L124 PetriNetUnfolderBase]: 7801/14852 cut-off events. [2023-08-04 07:58:03,902 INFO L125 PetriNetUnfolderBase]: For 17557/17557 co-relation queries the response was YES. [2023-08-04 07:58:03,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40249 conditions, 14852 events. 7801/14852 cut-off events. For 17557/17557 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 118558 event pairs, 2218 based on Foata normal form. 651/15486 useless extension candidates. Maximal degree in co-relation 34053. Up to 4250 conditions per place. [2023-08-04 07:58:03,960 INFO L140 encePairwiseOnDemand]: 268/287 looper letters, 241 selfloop transitions, 54 changer transitions 15/320 dead transitions. [2023-08-04 07:58:03,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 320 transitions, 1786 flow [2023-08-04 07:58:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 07:58:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 07:58:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2277 transitions. [2023-08-04 07:58:03,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958623693379791 [2023-08-04 07:58:03,966 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2277 transitions. [2023-08-04 07:58:03,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2277 transitions. [2023-08-04 07:58:03,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:03,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2277 transitions. [2023-08-04 07:58:03,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.3125) internal successors, (2277), 16 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:03,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:03,978 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:03,978 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 264 flow. Second operand 16 states and 2277 transitions. [2023-08-04 07:58:03,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 320 transitions, 1786 flow [2023-08-04 07:58:04,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 320 transitions, 1766 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:04,081 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 744 flow [2023-08-04 07:58:04,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=744, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2023-08-04 07:58:04,081 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 44 predicate places. [2023-08-04 07:58:04,081 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 744 flow [2023-08-04 07:58:04,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:04,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:04,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:04,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 07:58:04,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:58:04,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 328534622, now seen corresponding path program 1 times [2023-08-04 07:58:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335775261] [2023-08-04 07:58:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:58:04,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:04,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335775261] [2023-08-04 07:58:04,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335775261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:04,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092330174] [2023-08-04 07:58:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:04,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:04,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:04,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 07:58:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:04,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-04 07:58:04,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:58:04,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:58:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092330174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:04,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2023-08-04 07:58:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39731010] [2023-08-04 07:58:04,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:04,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 07:58:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 07:58:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-04 07:58:05,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2023-08-04 07:58:05,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 744 flow. Second operand has 13 states, 13 states have (on average 128.46153846153845) internal successors, (1670), 13 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:05,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:05,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2023-08-04 07:58:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:05,955 INFO L124 PetriNetUnfolderBase]: 3733/7424 cut-off events. [2023-08-04 07:58:05,955 INFO L125 PetriNetUnfolderBase]: For 18269/18269 co-relation queries the response was YES. [2023-08-04 07:58:05,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25296 conditions, 7424 events. 3733/7424 cut-off events. For 18269/18269 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 53962 event pairs, 1367 based on Foata normal form. 514/7934 useless extension candidates. Maximal degree in co-relation 24503. Up to 3344 conditions per place. [2023-08-04 07:58:05,998 INFO L140 encePairwiseOnDemand]: 269/287 looper letters, 0 selfloop transitions, 0 changer transitions 189/189 dead transitions. [2023-08-04 07:58:05,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 189 transitions, 1483 flow [2023-08-04 07:58:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:58:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:58:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1120 transitions. [2023-08-04 07:58:06,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2023-08-04 07:58:06,001 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1120 transitions. [2023-08-04 07:58:06,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1120 transitions. [2023-08-04 07:58:06,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:06,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1120 transitions. [2023-08-04 07:58:06,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:06,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:06,008 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:06,008 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 744 flow. Second operand 8 states and 1120 transitions. [2023-08-04 07:58:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 189 transitions, 1483 flow [2023-08-04 07:58:06,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 189 transitions, 1400 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-04 07:58:06,093 INFO L231 Difference]: Finished difference. Result has 105 places, 0 transitions, 0 flow [2023-08-04 07:58:06,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=105, PETRI_TRANSITIONS=0} [2023-08-04 07:58:06,093 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 44 predicate places. [2023-08-04 07:58:06,093 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 0 transitions, 0 flow [2023-08-04 07:58:06,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 128.46153846153845) internal successors, (1670), 13 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:06,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:58:06,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 07:58:06,305 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:06,305 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:58:06,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,367 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-04 07:58:06,367 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 07:58:06,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4287 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 07:58:06,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,378 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:58:06,378 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,378 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 169 transitions, 386 flow [2023-08-04 07:58:06,436 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-04 07:58:06,436 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 07:58:06,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4287 event pairs, 2 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 07:58:06,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 9420 [2023-08-04 07:58:10,053 INFO L134 LiptonReduction]: Checked pairs total: 29136 [2023-08-04 07:58:10,053 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 07:58:10,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:58:10,054 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;@1e075f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:58:10,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:58:10,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:58:10,062 INFO L124 PetriNetUnfolderBase]: 12/96 cut-off events. [2023-08-04 07:58:10,062 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 07:58:10,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:10,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 07:58:10,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:58:10,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1058075479, now seen corresponding path program 1 times [2023-08-04 07:58:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:10,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054200271] [2023-08-04 07:58:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:58:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054200271] [2023-08-04 07:58:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054200271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:10,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481874227] [2023-08-04 07:58:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:10,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:10,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:10,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 07:58:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:10,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 07:58:10,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:58:10,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:58:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481874227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:10,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:58:10,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 07:58:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114427650] [2023-08-04 07:58:10,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:58:10,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:58:10,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:10,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:10,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:58:10,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:12,057 INFO L124 PetriNetUnfolderBase]: 19014/27931 cut-off events. [2023-08-04 07:58:12,057 INFO L125 PetriNetUnfolderBase]: For 1885/1885 co-relation queries the response was YES. [2023-08-04 07:58:12,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54197 conditions, 27931 events. 19014/27931 cut-off events. For 1885/1885 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 185449 event pairs, 8874 based on Foata normal form. 4632/28667 useless extension candidates. Maximal degree in co-relation 13842. Up to 24791 conditions per place. [2023-08-04 07:58:12,176 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 37 selfloop transitions, 5 changer transitions 18/79 dead transitions. [2023-08-04 07:58:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 318 flow [2023-08-04 07:58:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:58:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:58:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 776 transitions. [2023-08-04 07:58:12,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407665505226481 [2023-08-04 07:58:12,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 776 transitions. [2023-08-04 07:58:12,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 776 transitions. [2023-08-04 07:58:12,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:12,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 776 transitions. [2023-08-04 07:58:12,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,183 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 184 flow. Second operand 5 states and 776 transitions. [2023-08-04 07:58:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 318 flow [2023-08-04 07:58:12,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:58:12,205 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 131 flow [2023-08-04 07:58:12,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-04 07:58:12,206 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 07:58:12,206 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 131 flow [2023-08-04 07:58:12,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:12,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 07:58:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:12,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:58:12,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1181484696, now seen corresponding path program 1 times [2023-08-04 07:58:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16293947] [2023-08-04 07:58:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:58:12,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16293947] [2023-08-04 07:58:12,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16293947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:12,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:58:12,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:58:12,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685426327] [2023-08-04 07:58:12,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:12,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:58:12,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:12,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:58:12,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:58:12,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 287 [2023-08-04 07:58:12,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:12,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 287 [2023-08-04 07:58:12,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:12,858 INFO L124 PetriNetUnfolderBase]: 4153/6504 cut-off events. [2023-08-04 07:58:12,858 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-08-04 07:58:12,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12382 conditions, 6504 events. 4153/6504 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39379 event pairs, 2076 based on Foata normal form. 1/6059 useless extension candidates. Maximal degree in co-relation 3080. Up to 5433 conditions per place. [2023-08-04 07:58:12,888 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 31 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 07:58:12,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 204 flow [2023-08-04 07:58:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:58:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:58:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-04 07:58:12,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2023-08-04 07:58:12,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-04 07:58:12,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-04 07:58:12,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:12,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-04 07:58:12,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,893 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 131 flow. Second operand 3 states and 462 transitions. [2023-08-04 07:58:12,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 204 flow [2023-08-04 07:58:12,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 201 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 07:58:12,894 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 127 flow [2023-08-04 07:58:12,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-04 07:58:12,895 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-08-04 07:58:12,895 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 127 flow [2023-08-04 07:58:12,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:12,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:12,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:12,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 07:58:12,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:58:12,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:12,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1525559439, now seen corresponding path program 1 times [2023-08-04 07:58:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:12,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116157249] [2023-08-04 07:58:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:12,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:58:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116157249] [2023-08-04 07:58:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116157249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341656140] [2023-08-04 07:58:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:12,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:12,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:12,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 07:58:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:13,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:58:13,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:58:13,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:58:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:58:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341656140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:58:13,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:58:13,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:58:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289317625] [2023-08-04 07:58:13,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:58:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:58:13,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:58:13,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:13,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:58:13,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:13,452 INFO L124 PetriNetUnfolderBase]: 3533/5471 cut-off events. [2023-08-04 07:58:13,452 INFO L125 PetriNetUnfolderBase]: For 229/229 co-relation queries the response was YES. [2023-08-04 07:58:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10378 conditions, 5471 events. 3533/5471 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31905 event pairs, 1066 based on Foata normal form. 4/5132 useless extension candidates. Maximal degree in co-relation 7751. Up to 4513 conditions per place. [2023-08-04 07:58:13,478 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 37 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 07:58:13,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 230 flow [2023-08-04 07:58:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:58:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:58:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 609 transitions. [2023-08-04 07:58:13,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2023-08-04 07:58:13,480 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 609 transitions. [2023-08-04 07:58:13,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 609 transitions. [2023-08-04 07:58:13,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:13,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 609 transitions. [2023-08-04 07:58:13,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,483 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,483 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 127 flow. Second operand 4 states and 609 transitions. [2023-08-04 07:58:13,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 230 flow [2023-08-04 07:58:13,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:58:13,485 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 124 flow [2023-08-04 07:58:13,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-04 07:58:13,485 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-08-04 07:58:13,486 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 124 flow [2023-08-04 07:58:13,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:58:13,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:58:13,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:13,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:58:13,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:58:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 873546393, now seen corresponding path program 1 times [2023-08-04 07:58:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:58:13,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432284795] [2023-08-04 07:58:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:58:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:13,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:58:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432284795] [2023-08-04 07:58:13,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432284795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:58:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125362517] [2023-08-04 07:58:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:58:13,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:58:13,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:58:13,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 07:58:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:58:13,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 07:58:13,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:58:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:58:13,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:58:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125362517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:58:13,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:58:13,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 07:58:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791108745] [2023-08-04 07:58:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:58:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:58:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:58:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:58:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:58:13,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 287 [2023-08-04 07:58:13,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:13,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:58:13,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 287 [2023-08-04 07:58:13,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:58:14,222 INFO L124 PetriNetUnfolderBase]: 2509/3651 cut-off events. [2023-08-04 07:58:14,222 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 07:58:14,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7246 conditions, 3651 events. 2509/3651 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17680 event pairs, 202 based on Foata normal form. 256/3777 useless extension candidates. Maximal degree in co-relation 3185. Up to 1600 conditions per place. [2023-08-04 07:58:14,230 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 0 selfloop transitions, 0 changer transitions 83/83 dead transitions. [2023-08-04 07:58:14,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 326 flow [2023-08-04 07:58:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:58:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:58:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 775 transitions. [2023-08-04 07:58:14,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2023-08-04 07:58:14,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 775 transitions. [2023-08-04 07:58:14,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 775 transitions. [2023-08-04 07:58:14,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:58:14,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 775 transitions. [2023-08-04 07:58:14,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:14,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:14,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:14,237 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 124 flow. Second operand 5 states and 775 transitions. [2023-08-04 07:58:14,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 326 flow [2023-08-04 07:58:14,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 07:58:14,239 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-04 07:58:14,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-04 07:58:14,240 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-08-04 07:58:14,240 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-04 07:58:14,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:58:14,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:58:14,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:58:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 07:58:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:58:14,446 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:58:14,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (2/2) [2023-08-04 07:58:14,447 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:58:14,447 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:58:14,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:58:14 BasicIcfg [2023-08-04 07:58:14,452 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:58:14,453 INFO L158 Benchmark]: Toolchain (without parser) took 43981.20ms. Allocated memory was 369.1MB in the beginning and 6.8GB in the end (delta: 6.4GB). Free memory was 317.5MB in the beginning and 2.9GB in the end (delta: -2.6GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-04 07:58:14,453 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 369.1MB. Free memory was 322.5MB in the beginning and 322.3MB in the end (delta: 128.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:58:14,453 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.14ms. Allocated memory is still 369.1MB. Free memory was 317.5MB in the beginning and 289.0MB in the end (delta: 28.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-04 07:58:14,454 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.56ms. Allocated memory is still 369.1MB. Free memory was 289.0MB in the beginning and 286.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:58:14,454 INFO L158 Benchmark]: Boogie Preprocessor took 39.17ms. Allocated memory is still 369.1MB. Free memory was 286.6MB in the beginning and 284.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:58:14,454 INFO L158 Benchmark]: RCFGBuilder took 383.97ms. Allocated memory was 369.1MB in the beginning and 511.7MB in the end (delta: 142.6MB). Free memory was 284.8MB in the beginning and 464.6MB in the end (delta: -179.8MB). Peak memory consumption was 9.5MB. Max. memory is 16.0GB. [2023-08-04 07:58:14,454 INFO L158 Benchmark]: TraceAbstraction took 42909.31ms. Allocated memory was 511.7MB in the beginning and 6.8GB in the end (delta: 6.2GB). Free memory was 463.6MB in the beginning and 2.9GB in the end (delta: -2.5GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-04 07:58:14,456 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 369.1MB. Free memory was 322.5MB in the beginning and 322.3MB in the end (delta: 128.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 593.14ms. Allocated memory is still 369.1MB. Free memory was 317.5MB in the beginning and 289.0MB in the end (delta: 28.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.56ms. Allocated memory is still 369.1MB. Free memory was 289.0MB in the beginning and 286.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.17ms. Allocated memory is still 369.1MB. Free memory was 286.6MB in the beginning and 284.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 383.97ms. Allocated memory was 369.1MB in the beginning and 511.7MB in the end (delta: 142.6MB). Free memory was 284.8MB in the beginning and 464.6MB in the end (delta: -179.8MB). Peak memory consumption was 9.5MB. Max. memory is 16.0GB. * TraceAbstraction took 42909.31ms. Allocated memory was 511.7MB in the beginning and 6.8GB in the end (delta: 6.2GB). Free memory was 463.6MB in the beginning and 2.9GB in the end (delta: -2.5GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 133]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [133] - GenericResultAtLocation [Line: 495]: Unsoundness Warning unspecified type, defaulting to int C: short [495] - GenericResultAtLocation [Line: 495]: Unsoundness Warning unspecified type, defaulting to int C: short [495] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 125 PlacesBefore, 39 PlacesAfterwards, 133 TransitionsBefore, 42 TransitionsAfterwards, 3510 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 5 ChoiceCompositions, 104 TotalNumberOfCompositions, 9588 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5208, independent: 5025, independent conditional: 0, independent unconditional: 5025, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1955, independent: 1915, independent conditional: 0, independent unconditional: 1915, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5208, independent: 3110, independent conditional: 0, independent unconditional: 3110, dependent: 143, dependent conditional: 0, dependent unconditional: 143, unknown: 1955, unknown conditional: 0, unknown unconditional: 1955] , Statistics on independence cache: Total cache size (in pairs): 229, Positive cache size: 213, Positive conditional cache size: 0, Positive unconditional cache size: 213, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 125 PlacesBefore, 39 PlacesAfterwards, 133 TransitionsBefore, 42 TransitionsAfterwards, 3510 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 5 ChoiceCompositions, 104 TotalNumberOfCompositions, 8724 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4826, independent: 4667, independent conditional: 0, independent unconditional: 4667, dependent: 159, dependent conditional: 0, dependent unconditional: 159, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1969, independent: 1925, independent conditional: 0, independent unconditional: 1925, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4826, independent: 2742, independent conditional: 0, independent unconditional: 2742, dependent: 115, dependent conditional: 0, dependent unconditional: 115, unknown: 1969, unknown conditional: 0, unknown unconditional: 1969] , Statistics on independence cache: Total cache size (in pairs): 251, Positive cache size: 230, Positive conditional cache size: 0, Positive unconditional cache size: 230, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 157 PlacesBefore, 61 PlacesAfterwards, 169 TransitionsBefore, 68 TransitionsAfterwards, 9420 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 29202 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12664, independent: 12349, independent conditional: 0, independent unconditional: 12349, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4863, independent: 4788, independent conditional: 0, independent unconditional: 4788, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12664, independent: 7561, independent conditional: 0, independent unconditional: 7561, dependent: 240, dependent conditional: 0, dependent unconditional: 240, unknown: 4863, unknown conditional: 0, unknown unconditional: 4863] , Statistics on independence cache: Total cache size (in pairs): 645, Positive cache size: 615, Positive conditional cache size: 0, Positive unconditional cache size: 615, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 157 PlacesBefore, 61 PlacesAfterwards, 169 TransitionsBefore, 68 TransitionsAfterwards, 9420 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 29136 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13180, independent: 12865, independent conditional: 0, independent unconditional: 12865, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4908, independent: 4830, independent conditional: 0, independent unconditional: 4830, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13180, independent: 8035, independent conditional: 0, independent unconditional: 8035, dependent: 237, dependent conditional: 0, dependent unconditional: 237, unknown: 4908, unknown conditional: 0, unknown unconditional: 4908] , Statistics on independence cache: Total cache size (in pairs): 685, Positive cache size: 655, Positive conditional cache size: 0, Positive unconditional cache size: 655, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 966]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 149 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: 7.1s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 79 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 352 IncrementalHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 19 mSDtfsCounter, 352 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=0, InterpolantAutomatonStates: 19, 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, 0.5s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 251 SizeOfPredicates, 0 NumberOfNonLiveVariables, 724 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 21/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 177 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: 23.9s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 850 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 677 mSDsluCounter, 336 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 283 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2844 IncrementalHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 53 mSDtfsCounter, 2844 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 443 SyntacticMatches, 21 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=744occurred in iteration=10, InterpolantAutomatonStates: 54, 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, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 574 NumberOfCodeBlocks, 574 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1854 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 204/230 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 for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 149 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: 3.6s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 177 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: 8.1s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 180 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 145 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 412 IncrementalHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 8 mSDtfsCounter, 412 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=0, InterpolantAutomatonStates: 17, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 549 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 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! [2023-08-04 07:58:14,478 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...