/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-atomic/szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:51:32,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:51:32,387 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 20:51:32,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:51:32,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:51:32,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:51:32,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:51:32,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:51:32,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:51:32,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:51:32,424 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:51:32,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:51:32,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:51:32,425 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:51:32,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:51:32,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:51:32,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:51:32,426 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:51:32,426 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:51:32,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:51:32,426 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:51:32,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:51:32,427 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:51:32,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:51:32,428 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:51:32,428 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:51:32,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:51:32,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:32,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:51:32,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:51:32,429 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:51:32,430 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:51:32,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:51:32,430 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:51:32,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:51:32,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 20:51:32,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:51:32,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:51:32,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:51:32,735 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:51:32,735 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:51:32,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-26 20:51:33,731 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:51:33,943 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:51:33,943 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-26 20:51:33,954 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bc5dc95/12e07c2309d94fba88bd1ee31f1babef/FLAG8ab201e35 [2023-08-26 20:51:33,964 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bc5dc95/12e07c2309d94fba88bd1ee31f1babef [2023-08-26 20:51:33,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:51:33,966 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:51:33,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:33,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:51:33,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:51:33,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:33" (1/1) ... [2023-08-26 20:51:33,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d88215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:33, skipping insertion in model container [2023-08-26 20:51:33,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:33" (1/1) ... [2023-08-26 20:51:34,000 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:51:34,118 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:34,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:34,228 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:51:34,249 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:34,253 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 20:51:34,254 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 20:51:34,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:34,311 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:34,311 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:34,312 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:34,316 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:51:34,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34 WrapperNode [2023-08-26 20:51:34,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:34,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:34,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:51:34,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:51:34,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,349 INFO L138 Inliner]: procedures = 171, calls = 77, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 180 [2023-08-26 20:51:34,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:34,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:51:34,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:51:34,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:51:34,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,382 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:51:34,383 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:51:34,383 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:51:34,383 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:51:34,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (1/1) ... [2023-08-26 20:51:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:51:34,455 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 20:51:34,497 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 20:51:34,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:51:34,507 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 20:51:34,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 20:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 20:51:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 20:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:51:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:51:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:51:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:51:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:51:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:51:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:51:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:51:34,511 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 20:51:34,612 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:51:34,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:51:34,740 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:51:34,744 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:51:34,745 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-26 20:51:34,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:34 BoogieIcfgContainer [2023-08-26 20:51:34,746 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:51:34,748 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:51:34,748 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:51:34,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:51:34,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:51:33" (1/3) ... [2023-08-26 20:51:34,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abff82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:34, skipping insertion in model container [2023-08-26 20:51:34,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:34" (2/3) ... [2023-08-26 20:51:34,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abff82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:34, skipping insertion in model container [2023-08-26 20:51:34,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:34" (3/3) ... [2023-08-26 20:51:34,751 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2023-08-26 20:51:34,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:51:34,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-26 20:51:34,762 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:51:34,817 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:51:34,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 262 flow [2023-08-26 20:51:34,874 INFO L124 PetriNetUnfolderBase]: 22/121 cut-off events. [2023-08-26 20:51:34,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:51:34,880 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. [2023-08-26 20:51:34,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 123 transitions, 262 flow [2023-08-26 20:51:34,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 112 transitions, 233 flow [2023-08-26 20:51:34,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:34,934 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 112 transitions, 233 flow [2023-08-26 20:51:34,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 112 transitions, 233 flow [2023-08-26 20:51:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 112 transitions, 233 flow [2023-08-26 20:51:34,960 INFO L124 PetriNetUnfolderBase]: 22/112 cut-off events. [2023-08-26 20:51:34,960 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:51:34,961 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. [2023-08-26 20:51:34,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-26 20:51:36,238 INFO L134 LiptonReduction]: Checked pairs total: 9425 [2023-08-26 20:51:36,239 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-26 20:51:36,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:36,252 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;@721b7a76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:36,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 20:51:36,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:36,258 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-26 20:51:36,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:36,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:36,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:36,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:36,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1737406825, now seen corresponding path program 1 times [2023-08-26 20:51:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:36,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492509804] [2023-08-26 20:51:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:36,474 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 20:51:36,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492509804] [2023-08-26 20:51:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492509804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:36,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:36,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:51:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971096079] [2023-08-26 20:51:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:51:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:51:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:51:36,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 212 [2023-08-26 20:51:36,507 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) [2023-08-26 20:51:36,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:36,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 212 [2023-08-26 20:51:36,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:36,662 INFO L124 PetriNetUnfolderBase]: 777/1215 cut-off events. [2023-08-26 20:51:36,662 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-26 20:51:36,666 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. [2023-08-26 20:51:36,672 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 46 selfloop transitions, 3 changer transitions 2/61 dead transitions. [2023-08-26 20:51:36,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 61 transitions, 236 flow [2023-08-26 20:51:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:51:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:51:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 20:51:36,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644654088050315 [2023-08-26 20:51:36,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 20:51:36,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 20:51:36,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:36,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 20:51:36,698 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) [2023-08-26 20:51:36,700 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) [2023-08-26 20:51:36,701 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) [2023-08-26 20:51:36,702 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 109 flow. Second operand 3 states and 359 transitions. [2023-08-26 20:51:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 61 transitions, 236 flow [2023-08-26 20:51:36,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 229 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 20:51:36,706 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 110 flow [2023-08-26 20:51:36,708 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} [2023-08-26 20:51:36,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-26 20:51:36,712 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 110 flow [2023-08-26 20:51:36,712 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) [2023-08-26 20:51:36,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:36,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:36,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:51:36,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:36,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1069092921, now seen corresponding path program 1 times [2023-08-26 20:51:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:36,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520413632] [2023-08-26 20:51:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:36,755 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 20:51:36,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:36,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520413632] [2023-08-26 20:51:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520413632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:36,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:36,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:51:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562969883] [2023-08-26 20:51:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:51:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:51:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:51:36,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 212 [2023-08-26 20:51:36,758 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) [2023-08-26 20:51:36,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:36,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 212 [2023-08-26 20:51:36,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:36,882 INFO L124 PetriNetUnfolderBase]: 717/1127 cut-off events. [2023-08-26 20:51:36,882 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-26 20:51:36,884 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. [2023-08-26 20:51:36,887 INFO L140 encePairwiseOnDemand]: 208/212 looper letters, 41 selfloop transitions, 2 changer transitions 6/59 dead transitions. [2023-08-26 20:51:36,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 239 flow [2023-08-26 20:51:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:51:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:51:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-26 20:51:36,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518867924528302 [2023-08-26 20:51:36,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-26 20:51:36,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-26 20:51:36,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:36,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-26 20:51:36,890 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) [2023-08-26 20:51:36,892 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) [2023-08-26 20:51:36,893 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) [2023-08-26 20:51:36,893 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 110 flow. Second operand 3 states and 351 transitions. [2023-08-26 20:51:36,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 239 flow [2023-08-26 20:51:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 59 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:36,896 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 114 flow [2023-08-26 20:51:36,897 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} [2023-08-26 20:51:36,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-26 20:51:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 114 flow [2023-08-26 20:51:36,900 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) [2023-08-26 20:51:36,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:36,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:36,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:51:36,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:36,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1266041320, now seen corresponding path program 1 times [2023-08-26 20:51:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300799287] [2023-08-26 20:51:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:36,993 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 20:51:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300799287] [2023-08-26 20:51:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300799287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375286671] [2023-08-26 20:51:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:36,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-26 20:51:36,997 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) [2023-08-26 20:51:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-26 20:51:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:37,157 INFO L124 PetriNetUnfolderBase]: 844/1362 cut-off events. [2023-08-26 20:51:37,158 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2023-08-26 20:51:37,159 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. [2023-08-26 20:51:37,162 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 42 selfloop transitions, 6 changer transitions 38/93 dead transitions. [2023-08-26 20:51:37,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 93 transitions, 403 flow [2023-08-26 20:51:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:51:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:51:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 504 transitions. [2023-08-26 20:51:37,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47547169811320755 [2023-08-26 20:51:37,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 504 transitions. [2023-08-26 20:51:37,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 504 transitions. [2023-08-26 20:51:37,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:37,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 504 transitions. [2023-08-26 20:51:37,165 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) [2023-08-26 20:51:37,166 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) [2023-08-26 20:51:37,166 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) [2023-08-26 20:51:37,167 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 114 flow. Second operand 5 states and 504 transitions. [2023-08-26 20:51:37,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 93 transitions, 403 flow [2023-08-26 20:51:37,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 93 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:37,170 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 167 flow [2023-08-26 20:51:37,170 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} [2023-08-26 20:51:37,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-26 20:51:37,171 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 167 flow [2023-08-26 20:51:37,172 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) [2023-08-26 20:51:37,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:37,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:37,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:51:37,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:37,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash 349452056, now seen corresponding path program 2 times [2023-08-26 20:51:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:37,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140088051] [2023-08-26 20:51:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:37,238 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 20:51:37,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:37,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140088051] [2023-08-26 20:51:37,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140088051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:37,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:37,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:37,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548678667] [2023-08-26 20:51:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:37,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-26 20:51:37,243 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) [2023-08-26 20:51:37,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:37,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-26 20:51:37,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:37,386 INFO L124 PetriNetUnfolderBase]: 679/1182 cut-off events. [2023-08-26 20:51:37,386 INFO L125 PetriNetUnfolderBase]: For 957/959 co-relation queries the response was YES. [2023-08-26 20:51:37,388 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. [2023-08-26 20:51:37,390 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 54 selfloop transitions, 21 changer transitions 9/91 dead transitions. [2023-08-26 20:51:37,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 539 flow [2023-08-26 20:51:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:51:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:51:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 496 transitions. [2023-08-26 20:51:37,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2023-08-26 20:51:37,392 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 496 transitions. [2023-08-26 20:51:37,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 496 transitions. [2023-08-26 20:51:37,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:37,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 496 transitions. [2023-08-26 20:51:37,393 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) [2023-08-26 20:51:37,395 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) [2023-08-26 20:51:37,395 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) [2023-08-26 20:51:37,395 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 167 flow. Second operand 5 states and 496 transitions. [2023-08-26 20:51:37,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 539 flow [2023-08-26 20:51:37,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 482 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:37,401 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 337 flow [2023-08-26 20:51:37,401 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} [2023-08-26 20:51:37,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-26 20:51:37,402 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 337 flow [2023-08-26 20:51:37,402 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) [2023-08-26 20:51:37,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:37,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:37,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:51:37,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:37,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash -696339048, now seen corresponding path program 3 times [2023-08-26 20:51:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979125828] [2023-08-26 20:51:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:37,455 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 20:51:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979125828] [2023-08-26 20:51:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979125828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097911030] [2023-08-26 20:51:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-26 20:51:37,461 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) [2023-08-26 20:51:37,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:37,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-26 20:51:37,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:37,674 INFO L124 PetriNetUnfolderBase]: 839/1498 cut-off events. [2023-08-26 20:51:37,674 INFO L125 PetriNetUnfolderBase]: For 2510/2512 co-relation queries the response was YES. [2023-08-26 20:51:37,677 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. [2023-08-26 20:51:37,681 INFO L140 encePairwiseOnDemand]: 199/212 looper letters, 80 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2023-08-26 20:51:37,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 108 transitions, 812 flow [2023-08-26 20:51:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:51:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:51:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 497 transitions. [2023-08-26 20:51:37,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688679245283019 [2023-08-26 20:51:37,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 497 transitions. [2023-08-26 20:51:37,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 497 transitions. [2023-08-26 20:51:37,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:37,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 497 transitions. [2023-08-26 20:51:37,684 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) [2023-08-26 20:51:37,685 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) [2023-08-26 20:51:37,686 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) [2023-08-26 20:51:37,686 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 337 flow. Second operand 5 states and 497 transitions. [2023-08-26 20:51:37,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 108 transitions, 812 flow [2023-08-26 20:51:37,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 802 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:37,694 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 583 flow [2023-08-26 20:51:37,694 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} [2023-08-26 20:51:37,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2023-08-26 20:51:37,696 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 583 flow [2023-08-26 20:51:37,697 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) [2023-08-26 20:51:37,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:37,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:37,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:51:37,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 20:51:37,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -475147652, now seen corresponding path program 4 times [2023-08-26 20:51:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:37,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714908769] [2023-08-26 20:51:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:37,737 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 20:51:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714908769] [2023-08-26 20:51:37,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714908769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:37,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:37,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906173267] [2023-08-26 20:51:37,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:37,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 212 [2023-08-26 20:51:37,744 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) [2023-08-26 20:51:37,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:37,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 212 [2023-08-26 20:51:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:37,940 INFO L124 PetriNetUnfolderBase]: 821/1436 cut-off events. [2023-08-26 20:51:37,940 INFO L125 PetriNetUnfolderBase]: For 3860/3958 co-relation queries the response was YES. [2023-08-26 20:51:37,942 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. [2023-08-26 20:51:37,944 INFO L140 encePairwiseOnDemand]: 196/212 looper letters, 0 selfloop transitions, 0 changer transitions 119/119 dead transitions. [2023-08-26 20:51:37,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 119 transitions, 975 flow [2023-08-26 20:51:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:51:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:51:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 488 transitions. [2023-08-26 20:51:37,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2023-08-26 20:51:37,945 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 488 transitions. [2023-08-26 20:51:37,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 488 transitions. [2023-08-26 20:51:37,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:37,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 488 transitions. [2023-08-26 20:51:37,947 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) [2023-08-26 20:51:37,948 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) [2023-08-26 20:51:37,948 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) [2023-08-26 20:51:37,948 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 583 flow. Second operand 5 states and 488 transitions. [2023-08-26 20:51:37,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 119 transitions, 975 flow [2023-08-26 20:51:37,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 119 transitions, 940 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:37,955 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-26 20:51:37,955 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} [2023-08-26 20:51:37,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2023-08-26 20:51:37,957 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-26 20:51:37,957 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) [2023-08-26 20:51:37,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-26 20:51:37,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 20:51:37,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-26 20:51:37,963 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-26 20:51:37,963 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 20:51:37,963 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 20:51:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:51:37,963 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-08-26 20:51:37,967 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:51:37,967 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:51:37,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:51:37 BasicIcfg [2023-08-26 20:51:37,969 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:51:37,969 INFO L158 Benchmark]: Toolchain (without parser) took 4002.68ms. Allocated memory was 396.4MB in the beginning and 476.1MB in the end (delta: 79.7MB). Free memory was 371.0MB in the beginning and 424.0MB in the end (delta: -53.0MB). Peak memory consumption was 286.4MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,969 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 396.4MB. Free memory is still 372.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:51:37,972 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.71ms. Allocated memory is still 396.4MB. Free memory was 371.0MB in the beginning and 350.7MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,972 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.66ms. Allocated memory is still 396.4MB. Free memory was 350.7MB in the beginning and 348.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,972 INFO L158 Benchmark]: Boogie Preprocessor took 33.00ms. Allocated memory is still 396.4MB. Free memory was 348.6MB in the beginning and 346.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,973 INFO L158 Benchmark]: RCFGBuilder took 363.51ms. Allocated memory is still 396.4MB. Free memory was 346.6MB in the beginning and 331.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,973 INFO L158 Benchmark]: TraceAbstraction took 3220.97ms. Allocated memory was 396.4MB in the beginning and 476.1MB in the end (delta: 79.7MB). Free memory was 331.3MB in the beginning and 424.0MB in the end (delta: -92.7MB). Peak memory consumption was 246.5MB. Max. memory is 16.0GB. [2023-08-26 20:51:37,974 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 396.4MB. Free memory is still 372.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 349.71ms. Allocated memory is still 396.4MB. Free memory was 371.0MB in the beginning and 350.7MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.66ms. Allocated memory is still 396.4MB. Free memory was 350.7MB in the beginning and 348.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.00ms. Allocated memory is still 396.4MB. Free memory was 348.6MB in the beginning and 346.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 363.51ms. Allocated memory is still 396.4MB. Free memory was 346.6MB in the beginning and 331.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3220.97ms. Allocated memory was 396.4MB in the beginning and 476.1MB in the end (delta: 79.7MB). Free memory was 331.3MB in the beginning and 424.0MB in the end (delta: -92.7MB). Peak memory consumption was 246.5MB. 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: 1.3s, 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: 3.1s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 191 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 191 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.3s 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, 0.3s 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! [2023-08-26 20:51:37,986 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...