/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:51:48,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:51:48,387 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 20:51:48,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:51:48,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:51:48,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:51:48,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:51:48,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:51:48,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:51:48,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:51:48,418 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:51:48,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:51:48,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:51:48,419 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:51:48,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:51:48,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:51:48,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:51:48,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:51:48,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:51:48,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:51:48,420 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:51:48,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:51:48,420 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:51:48,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:51:48,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:51:48,421 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:51:48,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:51:48,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:48,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:51:48,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:51:48,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:51:48,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:51:48,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:51:48,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:51:48,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:51:48,423 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 20:51:48,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:51:48,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:51:48,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:51:48,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:51:48,683 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:51:48,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-26 20:51:49,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:51:49,960 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:51:49,960 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-26 20:51:49,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a83c4d82/f341a68baad444719380aaf04d555dd3/FLAG25325b77c [2023-08-26 20:51:49,985 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a83c4d82/f341a68baad444719380aaf04d555dd3 [2023-08-26 20:51:49,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:51:49,990 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:51:49,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:49,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:51:49,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:51:49,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:49" (1/1) ... [2023-08-26 20:51:49,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757da8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:49, skipping insertion in model container [2023-08-26 20:51:49,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:49" (1/1) ... [2023-08-26 20:51:50,036 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:51:50,182 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:50,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:50,292 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:51:50,308 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:50,321 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 20:51:50,322 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 20:51:50,328 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [704] [2023-08-26 20:51:50,329 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [716] [2023-08-26 20:51:50,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:50,371 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:50,372 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:50,372 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:50,379 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:51:50,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50 WrapperNode [2023-08-26 20:51:50,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:50,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:50,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:51:50,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:51:50,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,408 INFO L138 Inliner]: procedures = 173, calls = 21, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 65 [2023-08-26 20:51:50,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:50,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:51:50,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:51:50,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:51:50,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,416 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,416 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:51:50,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:51:50,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:51:50,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:51:50,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (1/1) ... [2023-08-26 20:51:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:50,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:51:50,475 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) [2023-08-26 20:51:50,505 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 [2023-08-26 20:51:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 20:51:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:51:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:51:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:51:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:51:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:51:50,540 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:51:50,613 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:51:50,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:51:50,718 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:51:50,775 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:51:50,775 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 20:51:50,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:50 BoogieIcfgContainer [2023-08-26 20:51:50,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:51:50,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:51:50,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:51:50,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:51:50,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:51:49" (1/3) ... [2023-08-26 20:51:50,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdc14f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:50, skipping insertion in model container [2023-08-26 20:51:50,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:50" (2/3) ... [2023-08-26 20:51:50,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdc14f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:50, skipping insertion in model container [2023-08-26 20:51:50,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:50" (3/3) ... [2023-08-26 20:51:50,787 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-26 20:51:50,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:51:50,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-26 20:51:50,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:51:50,859 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:51:50,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,930 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2023-08-26 20:51:50,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:50,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-26 20:51:50,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,937 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:50,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-26 20:51:50,959 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2023-08-26 20:51:50,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-26 20:51:50,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-08-26 20:51:52,393 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-08-26 20:51:52,394 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-26 20:51:52,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:52,406 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d3823b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:52,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-26 20:51:52,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:52,408 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-26 20:51:52,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:52,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:52,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 20:51:52,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 20:51:52,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash 7873758, now seen corresponding path program 1 times [2023-08-26 20:51:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707551484] [2023-08-26 20:51:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707551484] [2023-08-26 20:51:52,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707551484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:52,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:52,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:51:52,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443270220] [2023-08-26 20:51:52,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:51:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:51:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:51:52,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 78 [2023-08-26 20:51:52,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:52,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:52,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 78 [2023-08-26 20:51:52,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:52,548 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-26 20:51:52,548 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:52,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-26 20:51:52,549 INFO L140 encePairwiseOnDemand]: 76/78 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-26 20:51:52,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-26 20:51:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:51:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:51:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-08-26 20:51:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-08-26 20:51:52,556 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-08-26 20:51:52,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-08-26 20:51:52,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:52,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-08-26 20:51:52,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:52,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:52,561 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:52,562 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 71 transitions. [2023-08-26 20:51:52,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-26 20:51:52,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:52,564 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-26 20:51:52,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-26 20:51:52,567 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-26 20:51:52,567 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-26 20:51:52,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:52,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:52,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 20:51:52,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:51:52,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 20:51:52,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1023270172, now seen corresponding path program 1 times [2023-08-26 20:51:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:52,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318788381] [2023-08-26 20:51:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:52,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:51:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:52,614 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:51:52,614 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:51:52,615 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-26 20:51:52,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2023-08-26 20:51:52,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2023-08-26 20:51:52,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:51:52,616 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:51:52,618 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:51:52,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 20:51:52,628 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:51:52,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,638 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-26 20:51:52,638 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:51:52,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-26 20:51:52,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,639 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:52,639 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,640 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-26 20:51:52,647 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-26 20:51:52,647 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:51:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-26 20:51:52,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-08-26 20:51:53,420 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-26 20:51:53,421 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-26 20:51:53,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:53,423 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d3823b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:53,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 20:51:53,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:53,425 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-26 20:51:53,425 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:51:53,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:53,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:53,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 20:51:53,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1176475444, now seen corresponding path program 1 times [2023-08-26 20:51:53,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:53,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487216363] [2023-08-26 20:51:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:53,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487216363] [2023-08-26 20:51:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487216363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:53,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:53,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:51:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959243015] [2023-08-26 20:51:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:53,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 87 [2023-08-26 20:51:53,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:53,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:53,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 87 [2023-08-26 20:51:53,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:53,829 INFO L124 PetriNetUnfolderBase]: 256/475 cut-off events. [2023-08-26 20:51:53,829 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-26 20:51:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 475 events. 256/475 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2491 event pairs, 53 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 884. Up to 148 conditions per place. [2023-08-26 20:51:53,836 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2023-08-26 20:51:53,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 236 flow [2023-08-26 20:51:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:51:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:51:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 247 transitions. [2023-08-26 20:51:53,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731800766283525 [2023-08-26 20:51:53,843 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 247 transitions. [2023-08-26 20:51:53,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 247 transitions. [2023-08-26 20:51:53,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:53,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 247 transitions. [2023-08-26 20:51:53,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:53,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:53,848 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:53,848 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 6 states and 247 transitions. [2023-08-26 20:51:53,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 236 flow [2023-08-26 20:51:53,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 234 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:53,850 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 116 flow [2023-08-26 20:51:53,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-26 20:51:53,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-26 20:51:53,851 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 116 flow [2023-08-26 20:51:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:53,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 20:51:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:51:53,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 20:51:53,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 586713859, now seen corresponding path program 1 times [2023-08-26 20:51:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960700453] [2023-08-26 20:51:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:53,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:51:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:53,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:51:53,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:51:53,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-26 20:51:53,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-26 20:51:53,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 20:51:53,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-26 20:51:53,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:51:53,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:51:53,892 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:51:53,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 20:51:53,908 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:51:53,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,923 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-08-26 20:51:53,923 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:51:53,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-26 20:51:53,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:53,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-26 20:51:53,933 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-08-26 20:51:53,933 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:51:53,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-26 20:51:53,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-08-26 20:51:54,988 INFO L134 LiptonReduction]: Checked pairs total: 10314 [2023-08-26 20:51:54,988 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-26 20:51:54,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:54,990 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d3823b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:54,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 20:51:54,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:54,992 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-26 20:51:54,992 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:51:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:54,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:54,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:51:54,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1209357644, now seen corresponding path program 1 times [2023-08-26 20:51:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423560213] [2023-08-26 20:51:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:55,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:55,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423560213] [2023-08-26 20:51:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423560213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:55,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:55,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:51:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093374143] [2023-08-26 20:51:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:55,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-08-26 20:51:55,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:55,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-08-26 20:51:55,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:55,631 INFO L124 PetriNetUnfolderBase]: 5256/7668 cut-off events. [2023-08-26 20:51:55,631 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-08-26 20:51:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15756 conditions, 7668 events. 5256/7668 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 47350 event pairs, 1315 based on Foata normal form. 0/6319 useless extension candidates. Maximal degree in co-relation 8306. Up to 3200 conditions per place. [2023-08-26 20:51:55,664 INFO L140 encePairwiseOnDemand]: 97/108 looper letters, 92 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-08-26 20:51:55,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 107 transitions, 481 flow [2023-08-26 20:51:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:51:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:51:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2023-08-26 20:51:55,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108024691358025 [2023-08-26 20:51:55,666 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2023-08-26 20:51:55,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2023-08-26 20:51:55,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:55,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2023-08-26 20:51:55,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,668 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 6 states and 331 transitions. [2023-08-26 20:51:55,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 107 transitions, 481 flow [2023-08-26 20:51:55,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 107 transitions, 467 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:55,671 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 176 flow [2023-08-26 20:51:55,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-26 20:51:55,671 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-26 20:51:55,671 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 176 flow [2023-08-26 20:51:55,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:55,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:55,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:51:55,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:51:55,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1139359333, now seen corresponding path program 1 times [2023-08-26 20:51:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:55,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910892771] [2023-08-26 20:51:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:55,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 20:51:55,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910892771] [2023-08-26 20:51:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910892771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:51:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623306198] [2023-08-26 20:51:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:55,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:55,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-08-26 20:51:55,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:55,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:55,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-08-26 20:51:55,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:56,520 INFO L124 PetriNetUnfolderBase]: 7361/10903 cut-off events. [2023-08-26 20:51:56,520 INFO L125 PetriNetUnfolderBase]: For 3753/3753 co-relation queries the response was YES. [2023-08-26 20:51:56,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 10903 events. 7361/10903 cut-off events. For 3753/3753 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 73813 event pairs, 2187 based on Foata normal form. 0/9934 useless extension candidates. Maximal degree in co-relation 18620. Up to 4998 conditions per place. [2023-08-26 20:51:56,581 INFO L140 encePairwiseOnDemand]: 101/108 looper letters, 97 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-08-26 20:51:56,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 119 transitions, 650 flow [2023-08-26 20:51:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:51:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:51:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 320 transitions. [2023-08-26 20:51:56,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2023-08-26 20:51:56,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 320 transitions. [2023-08-26 20:51:56,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 320 transitions. [2023-08-26 20:51:56,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:56,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 320 transitions. [2023-08-26 20:51:56,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.333333333333336) internal successors, (320), 6 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:56,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:56,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:56,586 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 176 flow. Second operand 6 states and 320 transitions. [2023-08-26 20:51:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 119 transitions, 650 flow [2023-08-26 20:51:56,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:56,606 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 306 flow [2023-08-26 20:51:56,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-26 20:51:56,609 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-08-26 20:51:56,609 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 306 flow [2023-08-26 20:51:56,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:56,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:56,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 20:51:56,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:51:56,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:51:56,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1105627914, now seen corresponding path program 1 times [2023-08-26 20:51:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922434693] [2023-08-26 20:51:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:56,625 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:51:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:56,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:51:56,643 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:51:56,644 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 20:51:56,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 20:51:56,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2023-08-26 20:51:56,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-26 20:51:56,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 20:51:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:51:56,644 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 20:51:56,645 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:51:56,645 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 20:51:56,667 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:51:56,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,679 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-08-26 20:51:56,679 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:51:56,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-26 20:51:56,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:56,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-26 20:51:56,692 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-08-26 20:51:56,692 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:51:56,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-26 20:51:56,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 3976 [2023-08-26 20:51:57,952 INFO L134 LiptonReduction]: Checked pairs total: 15362 [2023-08-26 20:51:57,952 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-26 20:51:57,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:57,953 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d3823b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:57,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 20:51:57,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:57,955 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-26 20:51:57,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:51:57,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:57,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:57,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:51:57,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash -745699764, now seen corresponding path program 1 times [2023-08-26 20:51:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:57,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794387281] [2023-08-26 20:51:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794387281] [2023-08-26 20:51:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794387281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:58,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:58,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:51:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954618610] [2023-08-26 20:51:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:58,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:58,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-26 20:51:58,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:58,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:58,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-26 20:51:58,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:03,112 INFO L124 PetriNetUnfolderBase]: 77874/102128 cut-off events. [2023-08-26 20:52:03,112 INFO L125 PetriNetUnfolderBase]: For 11600/11600 co-relation queries the response was YES. [2023-08-26 20:52:03,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210140 conditions, 102128 events. 77874/102128 cut-off events. For 11600/11600 co-relation queries the response was YES. Maximal size of possible extension queue 5190. Compared 659805 event pairs, 21367 based on Foata normal form. 0/82670 useless extension candidates. Maximal degree in co-relation 44210. Up to 46474 conditions per place. [2023-08-26 20:52:03,606 INFO L140 encePairwiseOnDemand]: 116/129 looper letters, 129 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2023-08-26 20:52:03,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 688 flow [2023-08-26 20:52:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:52:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:52:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 403 transitions. [2023-08-26 20:52:03,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520671834625323 [2023-08-26 20:52:03,608 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 403 transitions. [2023-08-26 20:52:03,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 403 transitions. [2023-08-26 20:52:03,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:03,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 403 transitions. [2023-08-26 20:52:03,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:03,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:03,611 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:03,611 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 6 states and 403 transitions. [2023-08-26 20:52:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 688 flow [2023-08-26 20:52:03,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 147 transitions, 652 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:03,617 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 228 flow [2023-08-26 20:52:03,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-26 20:52:03,618 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-26 20:52:03,619 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 228 flow [2023-08-26 20:52:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:03,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:03,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:03,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:52:03,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:52:03,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:03,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1181380565, now seen corresponding path program 1 times [2023-08-26 20:52:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119607151] [2023-08-26 20:52:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 20:52:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119607151] [2023-08-26 20:52:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119607151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:03,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:52:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692431666] [2023-08-26 20:52:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:52:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:52:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:52:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-26 20:52:03,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:03,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:03,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-26 20:52:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:12,913 INFO L124 PetriNetUnfolderBase]: 124153/164211 cut-off events. [2023-08-26 20:52:12,913 INFO L125 PetriNetUnfolderBase]: For 63957/63957 co-relation queries the response was YES. [2023-08-26 20:52:13,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386609 conditions, 164211 events. 124153/164211 cut-off events. For 63957/63957 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 1152910 event pairs, 38229 based on Foata normal form. 0/148786 useless extension candidates. Maximal degree in co-relation 216145. Up to 79252 conditions per place. [2023-08-26 20:52:13,891 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 140 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2023-08-26 20:52:13,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 168 transitions, 921 flow [2023-08-26 20:52:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:52:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:52:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-08-26 20:52:13,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2023-08-26 20:52:13,893 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-08-26 20:52:13,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-08-26 20:52:13,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:13,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-08-26 20:52:13,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:13,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:13,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:13,895 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 228 flow. Second operand 6 states and 390 transitions. [2023-08-26 20:52:13,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 168 transitions, 921 flow [2023-08-26 20:52:14,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 168 transitions, 921 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:14,460 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 399 flow [2023-08-26 20:52:14,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-26 20:52:14,461 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-26 20:52:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 399 flow [2023-08-26 20:52:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:52:14,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:52:14,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1635878426, now seen corresponding path program 1 times [2023-08-26 20:52:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856369] [2023-08-26 20:52:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 20:52:14,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:14,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856369] [2023-08-26 20:52:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:14,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:52:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243887622] [2023-08-26 20:52:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:14,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:52:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:52:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:52:14,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-26 20:52:14,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:14,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:14,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-26 20:52:14,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:29,678 INFO L124 PetriNetUnfolderBase]: 188457/251259 cut-off events. [2023-08-26 20:52:29,678 INFO L125 PetriNetUnfolderBase]: For 165005/165005 co-relation queries the response was YES. [2023-08-26 20:52:30,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634261 conditions, 251259 events. 188457/251259 cut-off events. For 165005/165005 co-relation queries the response was YES. Maximal size of possible extension queue 13093. Compared 1890794 event pairs, 61281 based on Foata normal form. 0/234139 useless extension candidates. Maximal degree in co-relation 401061. Up to 126840 conditions per place. [2023-08-26 20:52:31,193 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 153 selfloop transitions, 37 changer transitions 0/193 dead transitions. [2023-08-26 20:52:31,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 193 transitions, 1297 flow [2023-08-26 20:52:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:52:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:52:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2023-08-26 20:52:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 20:52:31,194 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 387 transitions. [2023-08-26 20:52:31,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 387 transitions. [2023-08-26 20:52:31,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:31,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 387 transitions. [2023-08-26 20:52:31,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:31,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:31,197 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:31,197 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 399 flow. Second operand 6 states and 387 transitions. [2023-08-26 20:52:31,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 193 transitions, 1297 flow [2023-08-26 20:52:32,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 193 transitions, 1297 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:32,346 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 701 flow [2023-08-26 20:52:32,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-08-26 20:52:32,346 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-26 20:52:32,347 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 701 flow [2023-08-26 20:52:32,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:32,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:32,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:52:32,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:52:32,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1991087652, now seen corresponding path program 1 times [2023-08-26 20:52:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:32,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463944438] [2023-08-26 20:52:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:52:32,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:32,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463944438] [2023-08-26 20:52:32,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463944438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:52:32,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111503845] [2023-08-26 20:52:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:32,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:52:32,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:52:32,434 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) [2023-08-26 20:52:32,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 20:52:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:32,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:52:32,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:52:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:52:32,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:52:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:52:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111503845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:52:32,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:52:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-26 20:52:32,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650615482] [2023-08-26 20:52:32,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:52:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 20:52:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 20:52:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-26 20:52:32,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 129 [2023-08-26 20:52:32,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 701 flow. Second operand has 15 states, 15 states have (on average 41.266666666666666) internal successors, (619), 15 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:32,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:32,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 129 [2023-08-26 20:52:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:53:55,795 INFO L124 PetriNetUnfolderBase]: 834109/1124812 cut-off events. [2023-08-26 20:53:55,795 INFO L125 PetriNetUnfolderBase]: For 1063852/1063852 co-relation queries the response was YES. [2023-08-26 20:53:58,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021040 conditions, 1124812 events. 834109/1124812 cut-off events. For 1063852/1063852 co-relation queries the response was YES. Maximal size of possible extension queue 63665. Compared 10028018 event pairs, 67560 based on Foata normal form. 53792/1135002 useless extension candidates. Maximal degree in co-relation 3020923. Up to 145347 conditions per place. [2023-08-26 20:54:03,135 INFO L140 encePairwiseOnDemand]: 96/129 looper letters, 1138 selfloop transitions, 983 changer transitions 0/2124 dead transitions. [2023-08-26 20:54:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 2124 transitions, 14284 flow [2023-08-26 20:54:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-26 20:54:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-26 20:54:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4560 transitions. [2023-08-26 20:54:03,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198358413132695 [2023-08-26 20:54:03,144 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4560 transitions. [2023-08-26 20:54:03,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4560 transitions. [2023-08-26 20:54:03,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:54:03,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4560 transitions. [2023-08-26 20:54:03,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 67.05882352941177) internal successors, (4560), 68 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:54:03,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:54:03,161 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:54:03,161 INFO L175 Difference]: Start difference. First operand has 73 places, 100 transitions, 701 flow. Second operand 68 states and 4560 transitions. [2023-08-26 20:54:03,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 2124 transitions, 14284 flow [2023-08-26 20:55:37,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 2124 transitions, 14284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:55:37,798 INFO L231 Difference]: Finished difference. Result has 205 places, 1115 transitions, 12022 flow [2023-08-26 20:55:37,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12022, PETRI_PLACES=205, PETRI_TRANSITIONS=1115} [2023-08-26 20:55:37,798 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2023-08-26 20:55:37,799 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 1115 transitions, 12022 flow [2023-08-26 20:55:37,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 41.266666666666666) internal successors, (619), 15 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:55:37,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:55:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:55:37,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 20:55:38,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 20:55:38,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:55:38,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:55:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1380764958, now seen corresponding path program 1 times [2023-08-26 20:55:38,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:55:38,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668914752] [2023-08-26 20:55:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:55:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:55:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:55:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 20:55:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:55:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668914752] [2023-08-26 20:55:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668914752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:55:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:55:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:55:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067741456] [2023-08-26 20:55:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:55:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:55:38,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:55:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:55:38,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:55:38,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 129 [2023-08-26 20:55:38,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 1115 transitions, 12022 flow. Second operand has 6 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:55:38,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:55:38,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 129 [2023-08-26 20:55:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand