/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 --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -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-atomic/szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 02:59:03,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 02:59:03,556 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 [2023-08-27 02:59:03,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 02:59:03,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 02:59:03,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 02:59:03,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 02:59:03,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 02:59:03,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 02:59:03,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 02:59:03,595 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 02:59:03,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 02:59:03,595 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 02:59:03,596 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 02:59:03,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 02:59:03,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 02:59:03,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 02:59:03,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 02:59:03,597 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 02:59:03,597 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 02:59:03,598 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 02:59:03,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 02:59:03,599 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 02:59:03,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 02:59:03,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 02:59:03,599 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 02:59:03,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 02:59:03,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:59:03,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 02:59:03,600 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 02:59:03,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 02:59:03,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 02:59:03,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 02:59:03,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 02:59:03,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 02:59:03,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 02:59:03,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 02:59:03,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 02:59:03,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 02:59:03,931 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 02:59:03,932 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 02:59:03,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-27 02:59:05,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 02:59:05,354 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 02:59:05,354 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-27 02:59:05,369 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebc61e6d1/22aa890bfb384652b770d393879e9398/FLAGb142b6ba9 [2023-08-27 02:59:05,380 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebc61e6d1/22aa890bfb384652b770d393879e9398 [2023-08-27 02:59:05,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 02:59:05,383 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 02:59:05,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 02:59:05,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 02:59:05,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 02:59:05,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c41f63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05, skipping insertion in model container [2023-08-27 02:59:05,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,426 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 02:59:05,593 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-27 02:59:05,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:59:05,761 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 02:59:05,781 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-27 02:59:05,792 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-27 02:59:05,794 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-27 02:59:05,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:59:05,849 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:59:05,849 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:59:05,849 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:59:05,855 INFO L206 MainTranslator]: Completed translation [2023-08-27 02:59:05,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05 WrapperNode [2023-08-27 02:59:05,856 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 02:59:05,857 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 02:59:05,857 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 02:59:05,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 02:59:05,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,918 INFO L138 Inliner]: procedures = 171, calls = 77, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 180 [2023-08-27 02:59:05,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 02:59:05,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 02:59:05,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 02:59:05,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 02:59:05,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 02:59:05,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 02:59:05,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 02:59:05,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 02:59:05,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (1/1) ... [2023-08-27 02:59:05,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:59:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:59:05,992 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) [2023-08-27 02:59:06,018 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 [2023-08-27 02:59:06,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 02:59:06,030 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-27 02:59:06,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-27 02:59:06,030 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-27 02:59:06,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 02:59:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 02:59:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 02:59:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 02:59:06,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 02:59:06,035 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 02:59:06,152 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 02:59:06,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 02:59:06,307 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 02:59:06,313 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 02:59:06,313 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-27 02:59:06,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:59:06 BoogieIcfgContainer [2023-08-27 02:59:06,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 02:59:06,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 02:59:06,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 02:59:06,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 02:59:06,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:59:05" (1/3) ... [2023-08-27 02:59:06,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42957cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:59:06, skipping insertion in model container [2023-08-27 02:59:06,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:59:05" (2/3) ... [2023-08-27 02:59:06,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42957cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:59:06, skipping insertion in model container [2023-08-27 02:59:06,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:59:06" (3/3) ... [2023-08-27 02:59:06,322 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2023-08-27 02:59:06,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 02:59:06,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-27 02:59:06,338 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 02:59:06,450 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 02:59:06,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 262 flow [2023-08-27 02:59:06,540 INFO L124 PetriNetUnfolderBase]: 22/121 cut-off events. [2023-08-27 02:59:06,540 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 02:59:06,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 121 events. 22/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 192 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-27 02:59:06,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 123 transitions, 262 flow [2023-08-27 02:59:06,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 112 transitions, 233 flow [2023-08-27 02:59:06,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 02:59:06,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 112 transitions, 233 flow [2023-08-27 02:59:06,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 112 transitions, 233 flow [2023-08-27 02:59:06,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 112 transitions, 233 flow [2023-08-27 02:59:06,613 INFO L124 PetriNetUnfolderBase]: 22/112 cut-off events. [2023-08-27 02:59:06,613 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 02:59:06,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 112 events. 22/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 192 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-27 02:59:06,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-27 02:59:08,304 INFO L134 LiptonReduction]: Checked pairs total: 9425 [2023-08-27 02:59:08,304 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-27 02:59:08,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 02:59:08,328 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;@2f229d1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 02:59:08,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-27 02:59:08,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 02:59:08,344 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-27 02:59:08,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 02:59:08,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:08,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:08,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:08,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1737406825, now seen corresponding path program 1 times [2023-08-27 02:59:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:08,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036349058] [2023-08-27 02:59:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:08,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:08,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036349058] [2023-08-27 02:59:08,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036349058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:08,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:08,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:59:08,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897252930] [2023-08-27 02:59:08,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:08,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:59:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:59:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:59:08,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 212 [2023-08-27 02:59:08,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:08,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 212 [2023-08-27 02:59:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:08,789 INFO L124 PetriNetUnfolderBase]: 777/1215 cut-off events. [2023-08-27 02:59:08,789 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-27 02:59:08,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1215 events. 777/1215 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5143 event pairs, 220 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2178. Up to 737 conditions per place. [2023-08-27 02:59:08,797 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 46 selfloop transitions, 3 changer transitions 2/61 dead transitions. [2023-08-27 02:59:08,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 61 transitions, 236 flow [2023-08-27 02:59:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:59:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:59:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-27 02:59:08,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644654088050315 [2023-08-27 02:59:08,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-27 02:59:08,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-27 02:59:08,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:08,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-27 02:59:08,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,841 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 109 flow. Second operand 3 states and 359 transitions. [2023-08-27 02:59:08,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 61 transitions, 236 flow [2023-08-27 02:59:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 229 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 02:59:08,847 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 110 flow [2023-08-27 02:59:08,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-08-27 02:59:08,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-27 02:59:08,852 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 110 flow [2023-08-27 02:59:08,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:08,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 02:59:08,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:08,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1069092921, now seen corresponding path program 1 times [2023-08-27 02:59:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315710764] [2023-08-27 02:59:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:08,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315710764] [2023-08-27 02:59:08,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315710764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:08,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:08,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:59:08,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131958754] [2023-08-27 02:59:08,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:08,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:59:08,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:59:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:59:08,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 212 [2023-08-27 02:59:08,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:08,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:08,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 212 [2023-08-27 02:59:08,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:09,063 INFO L124 PetriNetUnfolderBase]: 717/1127 cut-off events. [2023-08-27 02:59:09,063 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-27 02:59:09,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 1127 events. 717/1127 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4681 event pairs, 223 based on Foata normal form. 34/858 useless extension candidates. Maximal degree in co-relation 1356. Up to 739 conditions per place. [2023-08-27 02:59:09,068 INFO L140 encePairwiseOnDemand]: 208/212 looper letters, 41 selfloop transitions, 2 changer transitions 6/59 dead transitions. [2023-08-27 02:59:09,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 239 flow [2023-08-27 02:59:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:59:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:59:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-27 02:59:09,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518867924528302 [2023-08-27 02:59:09,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-27 02:59:09,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-27 02:59:09,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:09,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-27 02:59:09,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,083 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 110 flow. Second operand 3 states and 351 transitions. [2023-08-27 02:59:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 239 flow [2023-08-27 02:59:09,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 59 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:59:09,087 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 114 flow [2023-08-27 02:59:09,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2023-08-27 02:59:09,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-27 02:59:09,091 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 114 flow [2023-08-27 02:59:09,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:09,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 02:59:09,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:09,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1266041320, now seen corresponding path program 1 times [2023-08-27 02:59:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776623039] [2023-08-27 02:59:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776623039] [2023-08-27 02:59:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776623039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:09,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:09,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:59:09,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126774524] [2023-08-27 02:59:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:09,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:59:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:09,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:59:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:59:09,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-27 02:59:09,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:09,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-27 02:59:09,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:09,433 INFO L124 PetriNetUnfolderBase]: 844/1362 cut-off events. [2023-08-27 02:59:09,433 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2023-08-27 02:59:09,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1362 events. 844/1362 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6091 event pairs, 266 based on Foata normal form. 12/1075 useless extension candidates. Maximal degree in co-relation 1879. Up to 659 conditions per place. [2023-08-27 02:59:09,439 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 42 selfloop transitions, 6 changer transitions 38/93 dead transitions. [2023-08-27 02:59:09,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 93 transitions, 403 flow [2023-08-27 02:59:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:59:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:59:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 504 transitions. [2023-08-27 02:59:09,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47547169811320755 [2023-08-27 02:59:09,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 504 transitions. [2023-08-27 02:59:09,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 504 transitions. [2023-08-27 02:59:09,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:09,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 504 transitions. [2023-08-27 02:59:09,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,446 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 114 flow. Second operand 5 states and 504 transitions. [2023-08-27 02:59:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 93 transitions, 403 flow [2023-08-27 02:59:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 93 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:59:09,450 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 167 flow [2023-08-27 02:59:09,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-27 02:59:09,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-27 02:59:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 167 flow [2023-08-27 02:59:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:09,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 02:59:09,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:09,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash 349452056, now seen corresponding path program 2 times [2023-08-27 02:59:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:09,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732132505] [2023-08-27 02:59:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:09,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:09,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732132505] [2023-08-27 02:59:09,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732132505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:09,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:09,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:59:09,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654847492] [2023-08-27 02:59:09,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:09,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:59:09,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:59:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:59:09,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-27 02:59:09,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:09,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-27 02:59:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:09,731 INFO L124 PetriNetUnfolderBase]: 679/1182 cut-off events. [2023-08-27 02:59:09,731 INFO L125 PetriNetUnfolderBase]: For 957/959 co-relation queries the response was YES. [2023-08-27 02:59:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1182 events. 679/1182 cut-off events. For 957/959 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5535 event pairs, 188 based on Foata normal form. 40/1166 useless extension candidates. Maximal degree in co-relation 2005. Up to 474 conditions per place. [2023-08-27 02:59:09,736 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 54 selfloop transitions, 21 changer transitions 9/91 dead transitions. [2023-08-27 02:59:09,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 539 flow [2023-08-27 02:59:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:59:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:59:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 496 transitions. [2023-08-27 02:59:09,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2023-08-27 02:59:09,739 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 496 transitions. [2023-08-27 02:59:09,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 496 transitions. [2023-08-27 02:59:09,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:09,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 496 transitions. [2023-08-27 02:59:09,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.2) internal successors, (496), 5 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,743 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,743 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 167 flow. Second operand 5 states and 496 transitions. [2023-08-27 02:59:09,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 539 flow [2023-08-27 02:59:09,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 482 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-27 02:59:09,750 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 337 flow [2023-08-27 02:59:09,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2023-08-27 02:59:09,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-27 02:59:09,751 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 337 flow [2023-08-27 02:59:09,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:09,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:09,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 02:59:09,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:09,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:09,753 INFO L85 PathProgramCache]: Analyzing trace with hash -696339048, now seen corresponding path program 3 times [2023-08-27 02:59:09,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:09,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013814491] [2023-08-27 02:59:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:09,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:09,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013814491] [2023-08-27 02:59:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013814491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:09,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:09,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:59:09,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398887091] [2023-08-27 02:59:09,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:59:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:59:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:59:09,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-27 02:59:09,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:09,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:09,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-27 02:59:09,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:10,005 INFO L124 PetriNetUnfolderBase]: 839/1498 cut-off events. [2023-08-27 02:59:10,006 INFO L125 PetriNetUnfolderBase]: For 2510/2512 co-relation queries the response was YES. [2023-08-27 02:59:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4571 conditions, 1498 events. 839/1498 cut-off events. For 2510/2512 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7911 event pairs, 283 based on Foata normal form. 52/1520 useless extension candidates. Maximal degree in co-relation 3244. Up to 839 conditions per place. [2023-08-27 02:59:10,015 INFO L140 encePairwiseOnDemand]: 199/212 looper letters, 80 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2023-08-27 02:59:10,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 108 transitions, 812 flow [2023-08-27 02:59:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:59:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:59:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 497 transitions. [2023-08-27 02:59:10,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688679245283019 [2023-08-27 02:59:10,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 497 transitions. [2023-08-27 02:59:10,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 497 transitions. [2023-08-27 02:59:10,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:10,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 497 transitions. [2023-08-27 02:59:10,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.4) internal successors, (497), 5 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,022 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 337 flow. Second operand 5 states and 497 transitions. [2023-08-27 02:59:10,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 108 transitions, 812 flow [2023-08-27 02:59:10,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 802 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-27 02:59:10,031 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 583 flow [2023-08-27 02:59:10,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=583, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-08-27 02:59:10,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2023-08-27 02:59:10,033 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 583 flow [2023-08-27 02:59:10,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:59:10,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:59:10,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 02:59:10,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-27 02:59:10,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:59:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash -475147652, now seen corresponding path program 4 times [2023-08-27 02:59:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:59:10,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566160953] [2023-08-27 02:59:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:59:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:59:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:59:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:59:10,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:59:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566160953] [2023-08-27 02:59:10,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566160953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:59:10,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:59:10,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:59:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578583120] [2023-08-27 02:59:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:59:10,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:59:10,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:59:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:59:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:59:10,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-27 02:59:10,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 583 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:59:10,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-27 02:59:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:59:10,282 INFO L124 PetriNetUnfolderBase]: 821/1436 cut-off events. [2023-08-27 02:59:10,282 INFO L125 PetriNetUnfolderBase]: For 3860/3958 co-relation queries the response was YES. [2023-08-27 02:59:10,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 1436 events. 821/1436 cut-off events. For 3860/3958 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7007 event pairs, 266 based on Foata normal form. 58/1476 useless extension candidates. Maximal degree in co-relation 3778. Up to 813 conditions per place. [2023-08-27 02:59:10,288 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 0 selfloop transitions, 0 changer transitions 119/119 dead transitions. [2023-08-27 02:59:10,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 119 transitions, 975 flow [2023-08-27 02:59:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:59:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:59:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 488 transitions. [2023-08-27 02:59:10,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2023-08-27 02:59:10,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 488 transitions. [2023-08-27 02:59:10,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 488 transitions. [2023-08-27 02:59:10,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:59:10,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 488 transitions. [2023-08-27 02:59:10,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.6) internal successors, (488), 5 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,294 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 583 flow. Second operand 5 states and 488 transitions. [2023-08-27 02:59:10,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 119 transitions, 975 flow [2023-08-27 02:59:10,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 119 transitions, 940 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-27 02:59:10,306 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-27 02:59:10,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-27 02:59:10,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2023-08-27 02:59:10,307 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-27 02:59:10,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:59:10,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-27 02:59:10,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-27 02:59:10,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-27 02:59:10,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-27 02:59:10,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-27 02:59:10,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-27 02:59:10,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 02:59:10,311 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-08-27 02:59:10,314 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 02:59:10,314 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 02:59:10,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:59:10 BasicIcfg [2023-08-27 02:59:10,317 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 02:59:10,317 INFO L158 Benchmark]: Toolchain (without parser) took 4934.31ms. Allocated memory was 375.4MB in the beginning and 478.2MB in the end (delta: 102.8MB). Free memory was 350.6MB in the beginning and 277.5MB in the end (delta: 73.0MB). Peak memory consumption was 177.3MB. Max. memory is 16.0GB. [2023-08-27 02:59:10,317 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory was 351.4MB in the beginning and 351.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 02:59:10,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 472.50ms. Allocated memory is still 375.4MB. Free memory was 350.1MB in the beginning and 330.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 02:59:10,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.21ms. Allocated memory is still 375.4MB. Free memory was 330.1MB in the beginning and 328.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 02:59:10,318 INFO L158 Benchmark]: Boogie Preprocessor took 35.62ms. Allocated memory is still 375.4MB. Free memory was 327.5MB in the beginning and 326.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 02:59:10,319 INFO L158 Benchmark]: RCFGBuilder took 360.20ms. Allocated memory is still 375.4MB. Free memory was 326.1MB in the beginning and 311.2MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 02:59:10,319 INFO L158 Benchmark]: TraceAbstraction took 3999.21ms. Allocated memory was 375.4MB in the beginning and 478.2MB in the end (delta: 102.8MB). Free memory was 310.2MB in the beginning and 277.5MB in the end (delta: 32.7MB). Peak memory consumption was 137.5MB. Max. memory is 16.0GB. [2023-08-27 02:59:10,320 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory was 351.4MB in the beginning and 351.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 472.50ms. Allocated memory is still 375.4MB. Free memory was 350.1MB in the beginning and 330.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.21ms. Allocated memory is still 375.4MB. Free memory was 330.1MB in the beginning and 328.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.62ms. Allocated memory is still 375.4MB. Free memory was 327.5MB in the beginning and 326.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 360.20ms. Allocated memory is still 375.4MB. Free memory was 326.1MB in the beginning and 311.2MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3999.21ms. Allocated memory was 375.4MB in the beginning and 478.2MB in the end (delta: 102.8MB). Free memory was 310.2MB in the beginning and 277.5MB in the end (delta: 32.7MB). Peak memory consumption was 137.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 97 PlacesBefore, 43 PlacesAfterwards, 112 TransitionsBefore, 50 TransitionsAfterwards, 4592 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 8 ChoiceCompositions, 89 TotalNumberOfCompositions, 9425 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4842, independent: 4609, independent conditional: 0, independent unconditional: 4609, dependent: 233, dependent conditional: 0, dependent unconditional: 233, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2441, independent: 2394, independent conditional: 0, independent unconditional: 2394, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4842, independent: 2215, independent conditional: 0, independent unconditional: 2215, dependent: 186, dependent conditional: 0, dependent unconditional: 186, unknown: 2441, unknown conditional: 0, unknown unconditional: 2441] , Statistics on independence cache: Total cache size (in pairs): 298, Positive cache size: 264, Positive conditional cache size: 0, Positive unconditional cache size: 264, Negative cache size: 34, Negative conditional cache size: 0, Negative unconditional cache size: 34, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 166 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 191 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 191 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 755 IncrementalHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 24 mSDtfsCounter, 755 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=583occurred in iteration=5, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 142 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-27 02:59:10,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...