/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_44-traces-mine2_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:07:52,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:07:52,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:07:52,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:07:52,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:07:52,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:07:52,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:07:52,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:07:52,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:07:52,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:07:52,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:07:52,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:07:52,378 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:07:52,378 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:07:52,378 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:07:52,379 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:07:52,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:07:52,379 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:07:52,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:07:52,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:07:52,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:07:52,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:07:52,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:07:52,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:07:52,381 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:07:52,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:07:52,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:07:52,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:07:52,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:07:52,382 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:07:52,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:07:52,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:07:52,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:07:52,383 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:07:52,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:07:52,384 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:07:52,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:07:52,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:07:52,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:07:52,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:07:52,575 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:07:52,576 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:07:52,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_44-traces-mine2_true_bound2.i [2023-08-03 22:07:53,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:07:53,685 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:07:53,686 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_44-traces-mine2_true_bound2.i [2023-08-03 22:07:53,697 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af364ddb7/2fab366cee8c4df88fb2c8e9b8f8723f/FLAG804238351 [2023-08-03 22:07:54,073 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af364ddb7/2fab366cee8c4df88fb2c8e9b8f8723f [2023-08-03 22:07:54,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:07:54,075 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:07:54,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:07:54,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:07:54,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:07:54,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5319a8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54, skipping insertion in model container [2023-08-03 22:07:54,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,124 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:07:54,245 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_44-traces-mine2_true_bound2.i[1089,1102] [2023-08-03 22:07:54,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:07:54,377 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:07:54,386 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_44-traces-mine2_true_bound2.i[1089,1102] [2023-08-03 22:07:54,401 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:07:54,403 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:07:54,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:07:54,445 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:07:54,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54 WrapperNode [2023-08-03 22:07:54,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:07:54,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:07:54,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:07:54,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:07:54,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,494 INFO L138 Inliner]: procedures = 162, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-08-03 22:07:54,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:07:54,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:07:54,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:07:54,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:07:54,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,507 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:07:54,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:07:54,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:07:54,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:07:54,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (1/1) ... [2023-08-03 22:07:54,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:07:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:07:54,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:07:54,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:07:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:07:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:07:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:07:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:07:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 22:07:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 22:07:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:07:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:07:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:07:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:07:54,593 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:07:54,670 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:07:54,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:07:54,781 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:07:54,785 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:07:54,785 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 22:07:54,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:07:54 BoogieIcfgContainer [2023-08-03 22:07:54,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:07:54,805 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:07:54,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:07:54,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:07:54,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:07:54" (1/3) ... [2023-08-03 22:07:54,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344f30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:07:54, skipping insertion in model container [2023-08-03 22:07:54,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:54" (2/3) ... [2023-08-03 22:07:54,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344f30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:07:54, skipping insertion in model container [2023-08-03 22:07:54,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:07:54" (3/3) ... [2023-08-03 22:07:54,810 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_44-traces-mine2_true_bound2.i [2023-08-03 22:07:54,815 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:07:54,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:07:54,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:07:54,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:07:54,851 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:07:54,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 77 transitions, 159 flow [2023-08-03 22:07:54,908 INFO L124 PetriNetUnfolderBase]: 6/109 cut-off events. [2023-08-03 22:07:54,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 6/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-03 22:07:54,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 77 transitions, 159 flow [2023-08-03 22:07:54,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 49 transitions, 103 flow [2023-08-03 22:07:54,916 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:54,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 49 transitions, 103 flow [2023-08-03 22:07:54,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 49 transitions, 103 flow [2023-08-03 22:07:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 103 flow [2023-08-03 22:07:54,934 INFO L124 PetriNetUnfolderBase]: 0/53 cut-off events. [2023-08-03 22:07:54,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:54,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-03 22:07:54,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 240 [2023-08-03 22:07:56,909 INFO L134 LiptonReduction]: Checked pairs total: 197 [2023-08-03 22:07:56,909 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-03 22:07:56,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:07:56,932 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;@61916772, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:07:56,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:07:56,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:07:56,936 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:07:56,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:56,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:07:56,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:07:56,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash 8050854, now seen corresponding path program 1 times [2023-08-03 22:07:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:56,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566268417] [2023-08-03 22:07:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:56,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:07:57,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:07:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:07:57,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:07:57,096 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:07:57,097 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:07:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:07:57,098 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:07:57,100 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:07:57,100 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:07:57,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:07:57,119 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:07:57,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 90 transitions, 192 flow [2023-08-03 22:07:57,161 INFO L124 PetriNetUnfolderBase]: 9/159 cut-off events. [2023-08-03 22:07:57,161 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:57,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 159 events. 9/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 349 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-08-03 22:07:57,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 90 transitions, 192 flow [2023-08-03 22:07:57,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 62 transitions, 136 flow [2023-08-03 22:07:57,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:57,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 62 transitions, 136 flow [2023-08-03 22:07:57,163 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 62 transitions, 136 flow [2023-08-03 22:07:57,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 62 transitions, 136 flow [2023-08-03 22:07:57,169 INFO L124 PetriNetUnfolderBase]: 0/75 cut-off events. [2023-08-03 22:07:57,169 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 75 events. 0/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-03 22:07:57,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-03 22:07:58,716 INFO L134 LiptonReduction]: Checked pairs total: 2606 [2023-08-03 22:07:58,716 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-03 22:07:58,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:07:58,718 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;@61916772, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:07:58,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:07:58,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:07:58,720 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:07:58,721 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:58,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:58,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:07:58,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:07:58,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2124304081, now seen corresponding path program 1 times [2023-08-03 22:07:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77705904] [2023-08-03 22:07:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:58,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:58,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:58,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77705904] [2023-08-03 22:07:58,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77705904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:07:58,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843107230] [2023-08-03 22:07:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:58,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:07:58,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:07:58,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:07:58,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:07:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:58,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:07:58,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:07:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:58,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:07:58,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843107230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:58,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:07:58,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-03 22:07:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549410887] [2023-08-03 22:07:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:07:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:07:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:07:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 135 [2023-08-03 22:07:59,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:59,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:59,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 135 [2023-08-03 22:07:59,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:59,031 INFO L124 PetriNetUnfolderBase]: 24/84 cut-off events. [2023-08-03 22:07:59,031 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:07:59,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 84 events. 24/84 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 266 event pairs, 0 based on Foata normal form. 25/108 useless extension candidates. Maximal degree in co-relation 36. Up to 54 conditions per place. [2023-08-03 22:07:59,032 INFO L140 encePairwiseOnDemand]: 133/135 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-03 22:07:59,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 86 flow [2023-08-03 22:07:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:07:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:07:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2023-08-03 22:07:59,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-08-03 22:07:59,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2023-08-03 22:07:59,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2023-08-03 22:07:59,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:59,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2023-08-03 22:07:59,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:59,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:59,051 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:59,052 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 4 states and 333 transitions. [2023-08-03 22:07:59,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 86 flow [2023-08-03 22:07:59,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:07:59,055 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-03 22:07:59,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-03 22:07:59,058 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-08-03 22:07:59,058 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-03 22:07:59,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:59,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:07:59,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:07:59,261 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 [2023-08-03 22:07:59,261 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:07:59,262 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:07:59,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 90 transitions, 192 flow [2023-08-03 22:07:59,273 INFO L124 PetriNetUnfolderBase]: 9/159 cut-off events. [2023-08-03 22:07:59,273 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:59,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 159 events. 9/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 349 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-08-03 22:07:59,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 90 transitions, 192 flow [2023-08-03 22:07:59,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 81 transitions, 170 flow [2023-08-03 22:07:59,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:59,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 81 transitions, 170 flow [2023-08-03 22:07:59,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 81 transitions, 170 flow [2023-08-03 22:07:59,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 81 transitions, 170 flow [2023-08-03 22:07:59,281 INFO L124 PetriNetUnfolderBase]: 6/134 cut-off events. [2023-08-03 22:07:59,282 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:07:59,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 134 events. 6/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-08-03 22:07:59,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 1704 [2023-08-03 22:08:00,657 INFO L134 LiptonReduction]: Checked pairs total: 4802 [2023-08-03 22:08:00,657 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-03 22:08:00,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:08:00,668 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;@61916772, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:00,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:08:00,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:00,670 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-08-03 22:08:00,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:08:00,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:00,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-03 22:08:00,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:00,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 468812, now seen corresponding path program 1 times [2023-08-03 22:08:00,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72120035] [2023-08-03 22:08:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72120035] [2023-08-03 22:08:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72120035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:00,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:00,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:08:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956834087] [2023-08-03 22:08:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:00,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:08:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:08:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:08:00,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 152 [2023-08-03 22:08:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:00,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 152 [2023-08-03 22:08:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:00,781 INFO L124 PetriNetUnfolderBase]: 372/788 cut-off events. [2023-08-03 22:08:00,781 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:08:00,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 788 events. 372/788 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4397 event pairs, 160 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 272. Up to 638 conditions per place. [2023-08-03 22:08:00,787 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 23 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 22:08:00,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 122 flow [2023-08-03 22:08:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:08:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:08:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-03 22:08:00,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581140350877193 [2023-08-03 22:08:00,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-03 22:08:00,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-03 22:08:00,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:00,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-03 22:08:00,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,795 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 64 flow. Second operand 3 states and 265 transitions. [2023-08-03 22:08:00,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 122 flow [2023-08-03 22:08:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:08:00,796 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 72 flow [2023-08-03 22:08:00,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-03 22:08:00,796 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-03 22:08:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 72 flow [2023-08-03 22:08:00,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:00,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:08:00,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:00,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash -313861424, now seen corresponding path program 1 times [2023-08-03 22:08:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:00,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369957189] [2023-08-03 22:08:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369957189] [2023-08-03 22:08:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369957189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147175777] [2023-08-03 22:08:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:00,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:00,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:08:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:00,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:08:00,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:00,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:00,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147175777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:00,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:08:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524772542] [2023-08-03 22:08:00,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:00,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:00,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:08:00,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 152 [2023-08-03 22:08:00,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:00,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:00,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 152 [2023-08-03 22:08:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:01,011 INFO L124 PetriNetUnfolderBase]: 348/629 cut-off events. [2023-08-03 22:08:01,012 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-03 22:08:01,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 629 events. 348/629 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3196 event pairs, 45 based on Foata normal form. 5/603 useless extension candidates. Maximal degree in co-relation 272. Up to 456 conditions per place. [2023-08-03 22:08:01,015 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 30 selfloop transitions, 3 changer transitions 1/41 dead transitions. [2023-08-03 22:08:01,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 168 flow [2023-08-03 22:08:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:08:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:08:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2023-08-03 22:08:01,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707236842105263 [2023-08-03 22:08:01,021 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2023-08-03 22:08:01,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2023-08-03 22:08:01,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:01,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2023-08-03 22:08:01,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,024 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 72 flow. Second operand 4 states and 347 transitions. [2023-08-03 22:08:01,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 168 flow [2023-08-03 22:08:01,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:08:01,026 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 84 flow [2023-08-03 22:08:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-03 22:08:01,027 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-03 22:08:01,027 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 84 flow [2023-08-03 22:08:01,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:01,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:08:01,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 22:08:01,233 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,SelfDestructingSolverStorable3 [2023-08-03 22:08:01,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:01,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1657750485, now seen corresponding path program 1 times [2023-08-03 22:08:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951296031] [2023-08-03 22:08:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:01,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951296031] [2023-08-03 22:08:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951296031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:08:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921139091] [2023-08-03 22:08:01,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:01,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:08:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:08:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:08:01,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 152 [2023-08-03 22:08:01,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:01,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 152 [2023-08-03 22:08:01,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:01,395 INFO L124 PetriNetUnfolderBase]: 622/1162 cut-off events. [2023-08-03 22:08:01,395 INFO L125 PetriNetUnfolderBase]: For 516/516 co-relation queries the response was YES. [2023-08-03 22:08:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 1162 events. 622/1162 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6357 event pairs, 276 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 1507. Up to 559 conditions per place. [2023-08-03 22:08:01,399 INFO L140 encePairwiseOnDemand]: 144/152 looper letters, 36 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-08-03 22:08:01,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 232 flow [2023-08-03 22:08:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:08:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:08:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-03 22:08:01,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2023-08-03 22:08:01,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-03 22:08:01,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-03 22:08:01,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:01,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-03 22:08:01,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,402 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 84 flow. Second operand 3 states and 270 transitions. [2023-08-03 22:08:01,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 232 flow [2023-08-03 22:08:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 220 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:08:01,403 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 131 flow [2023-08-03 22:08:01,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-03 22:08:01,404 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-03 22:08:01,404 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 131 flow [2023-08-03 22:08:01,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:01,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:01,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:08:01,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:01,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash 334583145, now seen corresponding path program 1 times [2023-08-03 22:08:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:01,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984809575] [2023-08-03 22:08:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:08:01,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:01,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984809575] [2023-08-03 22:08:01,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984809575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:01,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:01,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:08:01,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72515132] [2023-08-03 22:08:01,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:01,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:08:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:08:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:08:01,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 152 [2023-08-03 22:08:01,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:01,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 152 [2023-08-03 22:08:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:01,569 INFO L124 PetriNetUnfolderBase]: 235/589 cut-off events. [2023-08-03 22:08:01,570 INFO L125 PetriNetUnfolderBase]: For 427/431 co-relation queries the response was YES. [2023-08-03 22:08:01,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 589 events. 235/589 cut-off events. For 427/431 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3325 event pairs, 86 based on Foata normal form. 68/653 useless extension candidates. Maximal degree in co-relation 640. Up to 270 conditions per place. [2023-08-03 22:08:01,572 INFO L140 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-03 22:08:01,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 282 flow [2023-08-03 22:08:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:08:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:08:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-03 22:08:01,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581140350877193 [2023-08-03 22:08:01,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-03 22:08:01,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-03 22:08:01,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:01,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-03 22:08:01,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,574 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 131 flow. Second operand 3 states and 265 transitions. [2023-08-03 22:08:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 282 flow [2023-08-03 22:08:01,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:08:01,576 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 154 flow [2023-08-03 22:08:01,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-03 22:08:01,577 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-03 22:08:01,577 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 154 flow [2023-08-03 22:08:01,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:08:01,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:01,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1784703150, now seen corresponding path program 1 times [2023-08-03 22:08:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:01,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943378367] [2023-08-03 22:08:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:01,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:01,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943378367] [2023-08-03 22:08:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943378367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:01,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:08:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191531126] [2023-08-03 22:08:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:08:01,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 152 [2023-08-03 22:08:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:01,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 152 [2023-08-03 22:08:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:01,816 INFO L124 PetriNetUnfolderBase]: 350/802 cut-off events. [2023-08-03 22:08:01,817 INFO L125 PetriNetUnfolderBase]: For 711/717 co-relation queries the response was YES. [2023-08-03 22:08:01,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 802 events. 350/802 cut-off events. For 711/717 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4633 event pairs, 56 based on Foata normal form. 55/856 useless extension candidates. Maximal degree in co-relation 818. Up to 260 conditions per place. [2023-08-03 22:08:01,819 INFO L140 encePairwiseOnDemand]: 140/152 looper letters, 56 selfloop transitions, 31 changer transitions 16/109 dead transitions. [2023-08-03 22:08:01,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 109 transitions, 650 flow [2023-08-03 22:08:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 22:08:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 22:08:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 618 transitions. [2023-08-03 22:08:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082236842105263 [2023-08-03 22:08:01,821 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 618 transitions. [2023-08-03 22:08:01,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 618 transitions. [2023-08-03 22:08:01,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:01,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 618 transitions. [2023-08-03 22:08:01,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 77.25) internal successors, (618), 8 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 152.0) internal successors, (1368), 9 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,824 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 152.0) internal successors, (1368), 9 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,824 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 154 flow. Second operand 8 states and 618 transitions. [2023-08-03 22:08:01,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 109 transitions, 650 flow [2023-08-03 22:08:01,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 109 transitions, 624 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:08:01,827 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 336 flow [2023-08-03 22:08:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-03 22:08:01,828 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-08-03 22:08:01,828 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 336 flow [2023-08-03 22:08:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:01,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:08:01,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:01,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1202420235, now seen corresponding path program 1 times [2023-08-03 22:08:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:01,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157582081] [2023-08-03 22:08:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:08:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157582081] [2023-08-03 22:08:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157582081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208016535] [2023-08-03 22:08:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:01,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:01,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:01,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:08:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:01,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 22:08:01,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:02,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 22:08:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:08:02,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:08:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:08:02,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:08:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:08:02,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:02,123 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_98 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#B~0.base| v_ArrVal_98) |c_~#A~0.base|) |c_~#A~0.offset|) 0))) is different from false [2023-08-03 22:08:02,157 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 22:08:02,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-03 22:08:02,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-03 22:08:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-03 22:08:02,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208016535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:02,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:02,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-03 22:08:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46062070] [2023-08-03 22:08:02,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 22:08:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 22:08:02,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=45, Unknown=1, NotChecked=14, Total=90 [2023-08-03 22:08:02,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 152 [2023-08-03 22:08:02,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:02,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:02,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 152 [2023-08-03 22:08:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:02,248 INFO L124 PetriNetUnfolderBase]: 41/138 cut-off events. [2023-08-03 22:08:02,248 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-08-03 22:08:02,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 138 events. 41/138 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 499 event pairs, 8 based on Foata normal form. 8/146 useless extension candidates. Maximal degree in co-relation 459. Up to 96 conditions per place. [2023-08-03 22:08:02,248 INFO L140 encePairwiseOnDemand]: 146/152 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-03 22:08:02,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 28 transitions, 191 flow [2023-08-03 22:08:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:08:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:08:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-03 22:08:02,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-08-03 22:08:02,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-03 22:08:02,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-03 22:08:02,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:02,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-03 22:08:02,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:02,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:02,252 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:02,252 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 336 flow. Second operand 4 states and 269 transitions. [2023-08-03 22:08:02,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 28 transitions, 191 flow [2023-08-03 22:08:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 28 transitions, 146 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-03 22:08:02,254 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-03 22:08:02,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-03 22:08:02,255 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-03 22:08:02,255 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-03 22:08:02,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:02,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 22:08:02,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 22:08:02,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 22:08:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:02,460 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-03 22:08:02,461 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (2/2) [2023-08-03 22:08:02,461 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:08:02,461 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:08:02,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:08:02 BasicIcfg [2023-08-03 22:08:02,464 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:08:02,465 INFO L158 Benchmark]: Toolchain (without parser) took 8389.44ms. Allocated memory was 333.4MB in the beginning and 524.3MB in the end (delta: 190.8MB). Free memory was 279.3MB in the beginning and 378.5MB in the end (delta: -99.2MB). Peak memory consumption was 95.2MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,465 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 333.4MB. Free memory is still 285.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:08:02,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.94ms. Allocated memory is still 333.4MB. Free memory was 279.3MB in the beginning and 260.1MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.52ms. Allocated memory is still 333.4MB. Free memory was 260.1MB in the beginning and 258.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,465 INFO L158 Benchmark]: Boogie Preprocessor took 23.89ms. Allocated memory is still 333.4MB. Free memory was 258.0MB in the beginning and 256.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,465 INFO L158 Benchmark]: RCFGBuilder took 266.81ms. Allocated memory is still 333.4MB. Free memory was 256.6MB in the beginning and 243.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,466 INFO L158 Benchmark]: TraceAbstraction took 7659.10ms. Allocated memory was 436.2MB in the beginning and 524.3MB in the end (delta: 88.1MB). Free memory was 402.7MB in the beginning and 378.5MB in the end (delta: 24.3MB). Peak memory consumption was 113.7MB. Max. memory is 16.0GB. [2023-08-03 22:08:02,466 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 333.4MB. Free memory is still 285.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 370.94ms. Allocated memory is still 333.4MB. Free memory was 279.3MB in the beginning and 260.1MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.52ms. Allocated memory is still 333.4MB. Free memory was 260.1MB in the beginning and 258.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.89ms. Allocated memory is still 333.4MB. Free memory was 258.0MB in the beginning and 256.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 266.81ms. Allocated memory is still 333.4MB. Free memory was 256.6MB in the beginning and 243.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 7659.10ms. Allocated memory was 436.2MB in the beginning and 524.3MB in the end (delta: 88.1MB). Free memory was 402.7MB in the beginning and 378.5MB in the end (delta: 24.3MB). Peak memory consumption was 113.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 52 PlacesBefore, 8 PlacesAfterwards, 49 TransitionsBefore, 5 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 16 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 47 TotalNumberOfCompositions, 197 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 197, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 127, independent: 127, independent conditional: 0, independent unconditional: 127, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 197, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 127, unknown conditional: 0, unknown unconditional: 127] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 67 PlacesBefore, 25 PlacesAfterwards, 62 TransitionsBefore, 20 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 2606 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 951, independent: 792, independent conditional: 0, independent unconditional: 792, 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: 401, independent: 375, independent conditional: 0, independent unconditional: 375, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 951, independent: 417, independent conditional: 0, independent unconditional: 417, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 401, unknown conditional: 0, unknown unconditional: 401] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 84 PlacesBefore, 32 PlacesAfterwards, 81 TransitionsBefore, 28 TransitionsAfterwards, 1704 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 62 TotalNumberOfCompositions, 4802 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1651, independent: 1474, independent conditional: 0, independent unconditional: 1474, dependent: 177, dependent conditional: 0, dependent unconditional: 177, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 831, independent: 794, independent conditional: 0, independent unconditional: 794, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1651, independent: 680, independent conditional: 0, independent unconditional: 680, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 831, unknown conditional: 0, unknown unconditional: 831] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: 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 for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 4 NumberOfCodeBlocks, 4 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 4 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39 IncrementalHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 1 mSDtfsCounter, 39 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 7/10 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 1 thread instances CFG has 4 procedures, 101 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: 3.2s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 232 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 138 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 487 IncrementalHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 19 mSDtfsCounter, 487 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=336occurred in iteration=5, InterpolantAutomatonStates: 25, 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, 0.5s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 100 ConstructedInterpolants, 7 QuantifiedInterpolants, 536 SizeOfPredicates, 3 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 27/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:08:02,482 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...