/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:49:49,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:49:49,916 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 [2023-08-24 11:49:49,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:49:49,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:49:49,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:49:49,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:49:49,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:49:49,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:49:49,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:49:49,958 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:49:49,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:49:49,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:49:49,960 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:49:49,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:49:49,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:49:49,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:49:49,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:49:49,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:49:49,961 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:49:49,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:49:49,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:49:49,962 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:49:49,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:49:49,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:49:49,963 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:49:49,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:49:49,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:49:49,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:49:49,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:49:49,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:49:49,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:49:49,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:49:49,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:49:49,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:49:49,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:49:50,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:49:50,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:49:50,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:49:50,315 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:49:50,315 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:49:50,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2023-08-24 11:49:51,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:49:51,751 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:49:51,751 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2023-08-24 11:49:51,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac67fd80/6c877da88b7e499181f5922f498e2427/FLAG862deae3c [2023-08-24 11:49:51,792 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac67fd80/6c877da88b7e499181f5922f498e2427 [2023-08-24 11:49:51,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:49:51,799 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:49:51,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:49:51,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:49:51,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:49:51,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:49:51" (1/1) ... [2023-08-24 11:49:51,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c62d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:51, skipping insertion in model container [2023-08-24 11:49:51,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:49:51" (1/1) ... [2023-08-24 11:49:51,858 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:49:52,026 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] [2023-08-24 11:49:52,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:49:52,210 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:49:52,228 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] [2023-08-24 11:49:52,242 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 11:49:52,244 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 11:49:52,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:49:52,306 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:49:52,306 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:49:52,313 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:49:52,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52 WrapperNode [2023-08-24 11:49:52,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:49:52,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:49:52,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:49:52,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:49:52,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,371 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-24 11:49:52,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:49:52,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:49:52,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:49:52,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:49:52,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,403 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:49:52,406 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:49:52,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:49:52,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:49:52,407 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (1/1) ... [2023-08-24 11:49:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:49:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:49:52,445 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) [2023-08-24 11:49:52,467 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 [2023-08-24 11:49:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-24 11:49:52,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-24 11:49:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-24 11:49:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-24 11:49:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-24 11:49:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-24 11:49:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:49:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:49:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:49:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:49:52,487 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:49:52,639 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:49:52,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:49:52,825 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:49:52,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:49:52,832 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 11:49:52,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:49:52 BoogieIcfgContainer [2023-08-24 11:49:52,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:49:52,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:49:52,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:49:52,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:49:52,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:49:51" (1/3) ... [2023-08-24 11:49:52,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c63768c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:49:52, skipping insertion in model container [2023-08-24 11:49:52,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:49:52" (2/3) ... [2023-08-24 11:49:52,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c63768c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:49:52, skipping insertion in model container [2023-08-24 11:49:52,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:49:52" (3/3) ... [2023-08-24 11:49:52,843 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2023-08-24 11:49:52,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:49:52,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:49:52,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:49:52,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:49:52,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 85 transitions, 185 flow [2023-08-24 11:49:53,031 INFO L124 PetriNetUnfolderBase]: 2/82 cut-off events. [2023-08-24 11:49:53,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:49:53,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-24 11:49:53,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 85 transitions, 185 flow [2023-08-24 11:49:53,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 149 flow [2023-08-24 11:49:53,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:49:53,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-24 11:49:53,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-24 11:49:53,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 149 flow [2023-08-24 11:49:53,102 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2023-08-24 11:49:53,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:49:53,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-24 11:49:53,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-24 11:49:55,125 INFO L134 LiptonReduction]: Checked pairs total: 2098 [2023-08-24 11:49:55,125 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-24 11:49:55,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:49:55,153 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;@95c24b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:49:55,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 11:49:55,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:49:55,166 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-24 11:49:55,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:49:55,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:55,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:55,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:55,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1331089238, now seen corresponding path program 1 times [2023-08-24 11:49:55,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:55,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881916481] [2023-08-24 11:49:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:55,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:55,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881916481] [2023-08-24 11:49:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881916481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:55,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:55,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 11:49:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374078562] [2023-08-24 11:49:55,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:49:55,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:49:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:49:55,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 143 [2023-08-24 11:49:55,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:49:55,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:55,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 143 [2023-08-24 11:49:55,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:55,860 INFO L124 PetriNetUnfolderBase]: 424/734 cut-off events. [2023-08-24 11:49:55,861 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 11:49:55,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 734 events. 424/734 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3618 event pairs, 160 based on Foata normal form. 43/777 useless extension candidates. Maximal degree in co-relation 1476. Up to 392 conditions per place. [2023-08-24 11:49:55,871 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 21 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2023-08-24 11:49:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 122 flow [2023-08-24 11:49:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:49:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:49:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-24 11:49:55,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2023-08-24 11:49:55,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-24 11:49:55,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-24 11:49:55,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:55,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-24 11:49:55,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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) [2023-08-24 11:49:55,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-08-24 11:49:55,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-08-24 11:49:55,904 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 237 transitions. [2023-08-24 11:49:55,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 122 flow [2023-08-24 11:49:55,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 11:49:55,908 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 86 flow [2023-08-24 11:49:55,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-24 11:49:55,913 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-24 11:49:55,913 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 86 flow [2023-08-24 11:49:55,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:49:55,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:55,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:49:55,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:55,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1685907047, now seen corresponding path program 1 times [2023-08-24 11:49:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:55,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701184373] [2023-08-24 11:49:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:55,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701184373] [2023-08-24 11:49:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701184373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:56,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:49:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748616644] [2023-08-24 11:49:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:49:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:49:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:49:56,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 143 [2023-08-24 11:49:56,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-24 11:49:56,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:56,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 143 [2023-08-24 11:49:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:56,170 INFO L124 PetriNetUnfolderBase]: 349/606 cut-off events. [2023-08-24 11:49:56,170 INFO L125 PetriNetUnfolderBase]: For 265/265 co-relation queries the response was YES. [2023-08-24 11:49:56,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 606 events. 349/606 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2869 event pairs, 114 based on Foata normal form. 18/620 useless extension candidates. Maximal degree in co-relation 1616. Up to 209 conditions per place. [2023-08-24 11:49:56,174 INFO L140 encePairwiseOnDemand]: 137/143 looper letters, 32 selfloop transitions, 6 changer transitions 2/41 dead transitions. [2023-08-24 11:49:56,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 228 flow [2023-08-24 11:49:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:49:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:49:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-24 11:49:56,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-08-24 11:49:56,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-24 11:49:56,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-24 11:49:56,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:56,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-24 11:49:56,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-08-24 11:49:56,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,187 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 86 flow. Second operand 4 states and 312 transitions. [2023-08-24 11:49:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 228 flow [2023-08-24 11:49:56,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:49:56,192 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 118 flow [2023-08-24 11:49:56,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-24 11:49:56,195 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-24 11:49:56,196 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 118 flow [2023-08-24 11:49:56,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-24 11:49:56,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:56,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:56,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:49:56,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:56,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1271782783, now seen corresponding path program 1 times [2023-08-24 11:49:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496241146] [2023-08-24 11:49:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496241146] [2023-08-24 11:49:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496241146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:56,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:49:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952276389] [2023-08-24 11:49:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:49:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:49:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:49:56,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 143 [2023-08-24 11:49:56,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-08-24 11:49:56,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:56,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 143 [2023-08-24 11:49:56,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:56,417 INFO L124 PetriNetUnfolderBase]: 341/594 cut-off events. [2023-08-24 11:49:56,418 INFO L125 PetriNetUnfolderBase]: For 499/499 co-relation queries the response was YES. [2023-08-24 11:49:56,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 594 events. 341/594 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2722 event pairs, 85 based on Foata normal form. 4/596 useless extension candidates. Maximal degree in co-relation 1716. Up to 219 conditions per place. [2023-08-24 11:49:56,421 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 27 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-08-24 11:49:56,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 244 flow [2023-08-24 11:49:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:49:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:49:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-08-24 11:49:56,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367132867132867 [2023-08-24 11:49:56,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-08-24 11:49:56,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-08-24 11:49:56,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:56,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-08-24 11:49:56,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 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) [2023-08-24 11:49:56,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,427 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,427 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 118 flow. Second operand 4 states and 307 transitions. [2023-08-24 11:49:56,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 244 flow [2023-08-24 11:49:56,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:49:56,432 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 180 flow [2023-08-24 11:49:56,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-24 11:49:56,434 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-24 11:49:56,437 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 180 flow [2023-08-24 11:49:56,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-08-24 11:49:56,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:56,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:49:56,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:56,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1652113145, now seen corresponding path program 1 times [2023-08-24 11:49:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:56,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864054448] [2023-08-24 11:49:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:56,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864054448] [2023-08-24 11:49:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864054448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:56,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:56,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:49:56,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174822781] [2023-08-24 11:49:56,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:56,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:49:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:49:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:49:56,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 143 [2023-08-24 11:49:56,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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) [2023-08-24 11:49:56,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:56,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 143 [2023-08-24 11:49:56,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:56,718 INFO L124 PetriNetUnfolderBase]: 487/794 cut-off events. [2023-08-24 11:49:56,718 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2023-08-24 11:49:56,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 794 events. 487/794 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3336 event pairs, 86 based on Foata normal form. 8/802 useless extension candidates. Maximal degree in co-relation 2650. Up to 296 conditions per place. [2023-08-24 11:49:56,723 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 38 selfloop transitions, 14 changer transitions 14/66 dead transitions. [2023-08-24 11:49:56,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 543 flow [2023-08-24 11:49:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:49:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:49:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 384 transitions. [2023-08-24 11:49:56,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370629370629371 [2023-08-24 11:49:56,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 384 transitions. [2023-08-24 11:49:56,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 384 transitions. [2023-08-24 11:49:56,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:56,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 384 transitions. [2023-08-24 11:49:56,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 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) [2023-08-24 11:49:56,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-08-24 11:49:56,729 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-08-24 11:49:56,729 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 180 flow. Second operand 5 states and 384 transitions. [2023-08-24 11:49:56,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 543 flow [2023-08-24 11:49:56,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 536 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:49:56,736 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 308 flow [2023-08-24 11:49:56,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-24 11:49:56,738 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-24 11:49:56,738 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 308 flow [2023-08-24 11:49:56,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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) [2023-08-24 11:49:56,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:56,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:49:56,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:56,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash 324099592, now seen corresponding path program 1 times [2023-08-24 11:49:56,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:56,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328266866] [2023-08-24 11:49:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:56,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328266866] [2023-08-24 11:49:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328266866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:56,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:49:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354966502] [2023-08-24 11:49:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:56,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:49:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:49:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:49:56,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 143 [2023-08-24 11:49:56,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 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) [2023-08-24 11:49:56,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:56,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 143 [2023-08-24 11:49:56,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:56,936 INFO L124 PetriNetUnfolderBase]: 301/573 cut-off events. [2023-08-24 11:49:56,936 INFO L125 PetriNetUnfolderBase]: For 1772/1798 co-relation queries the response was YES. [2023-08-24 11:49:56,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 573 events. 301/573 cut-off events. For 1772/1798 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2865 event pairs, 87 based on Foata normal form. 22/582 useless extension candidates. Maximal degree in co-relation 2073. Up to 250 conditions per place. [2023-08-24 11:49:56,939 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 22 selfloop transitions, 5 changer transitions 12/43 dead transitions. [2023-08-24 11:49:56,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 396 flow [2023-08-24 11:49:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:49:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:49:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2023-08-24 11:49:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664335664335665 [2023-08-24 11:49:56,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2023-08-24 11:49:56,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2023-08-24 11:49:56,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:56,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2023-08-24 11:49:56,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2023-08-24 11:49:56,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,944 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:56,944 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 308 flow. Second operand 4 states and 324 transitions. [2023-08-24 11:49:56,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 396 flow [2023-08-24 11:49:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:49:56,952 INFO L231 Difference]: Finished difference. Result has 49 places, 24 transitions, 206 flow [2023-08-24 11:49:56,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=49, PETRI_TRANSITIONS=24} [2023-08-24 11:49:56,954 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-24 11:49:56,954 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 24 transitions, 206 flow [2023-08-24 11:49:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 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) [2023-08-24 11:49:56,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:56,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:56,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:49:56,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:56,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 728157728, now seen corresponding path program 1 times [2023-08-24 11:49:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:56,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845045310] [2023-08-24 11:49:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:56,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845045310] [2023-08-24 11:49:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845045310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:49:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224276401] [2023-08-24 11:49:57,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:49:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:49:57,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:49:57,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 143 [2023-08-24 11:49:57,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 24 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2023-08-24 11:49:57,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:57,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 143 [2023-08-24 11:49:57,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:57,137 INFO L124 PetriNetUnfolderBase]: 96/203 cut-off events. [2023-08-24 11:49:57,137 INFO L125 PetriNetUnfolderBase]: For 780/795 co-relation queries the response was YES. [2023-08-24 11:49:57,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 203 events. 96/203 cut-off events. For 780/795 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 789 event pairs, 24 based on Foata normal form. 11/206 useless extension candidates. Maximal degree in co-relation 784. Up to 143 conditions per place. [2023-08-24 11:49:57,138 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 25 selfloop transitions, 3 changer transitions 1/35 dead transitions. [2023-08-24 11:49:57,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 35 transitions, 336 flow [2023-08-24 11:49:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:49:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:49:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-24 11:49:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-08-24 11:49:57,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-24 11:49:57,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-24 11:49:57,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:57,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-24 11:49:57,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:49:57,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-08-24 11:49:57,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-08-24 11:49:57,142 INFO L175 Difference]: Start difference. First operand has 49 places, 24 transitions, 206 flow. Second operand 3 states and 247 transitions. [2023-08-24 11:49:57,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 35 transitions, 336 flow [2023-08-24 11:49:57,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 256 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-24 11:49:57,145 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 165 flow [2023-08-24 11:49:57,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-24 11:49:57,146 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-08-24 11:49:57,146 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 165 flow [2023-08-24 11:49:57,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2023-08-24 11:49:57,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:57,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:57,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 11:49:57,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:57,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1655085292, now seen corresponding path program 1 times [2023-08-24 11:49:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398957707] [2023-08-24 11:49:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398957707] [2023-08-24 11:49:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398957707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:49:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815047028] [2023-08-24 11:49:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:57,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:49:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:49:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:49:57,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 143 [2023-08-24 11:49:57,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-08-24 11:49:57,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 143 [2023-08-24 11:49:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:57,268 INFO L124 PetriNetUnfolderBase]: 76/164 cut-off events. [2023-08-24 11:49:57,268 INFO L125 PetriNetUnfolderBase]: For 314/340 co-relation queries the response was YES. [2023-08-24 11:49:57,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 164 events. 76/164 cut-off events. For 314/340 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 611 event pairs, 13 based on Foata normal form. 20/175 useless extension candidates. Maximal degree in co-relation 623. Up to 66 conditions per place. [2023-08-24 11:49:57,270 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 27 selfloop transitions, 5 changer transitions 3/41 dead transitions. [2023-08-24 11:49:57,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 320 flow [2023-08-24 11:49:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:49:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:49:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 326 transitions. [2023-08-24 11:49:57,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5699300699300699 [2023-08-24 11:49:57,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 326 transitions. [2023-08-24 11:49:57,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 326 transitions. [2023-08-24 11:49:57,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:57,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 326 transitions. [2023-08-24 11:49:57,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2023-08-24 11:49:57,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:57,274 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-08-24 11:49:57,274 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 165 flow. Second operand 4 states and 326 transitions. [2023-08-24 11:49:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 320 flow [2023-08-24 11:49:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 311 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 11:49:57,276 INFO L231 Difference]: Finished difference. Result has 43 places, 26 transitions, 174 flow [2023-08-24 11:49:57,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=43, PETRI_TRANSITIONS=26} [2023-08-24 11:49:57,276 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-08-24 11:49:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 26 transitions, 174 flow [2023-08-24 11:49:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-08-24 11:49:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:49:57,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 11:49:57,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:49:57,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:49:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1140432208, now seen corresponding path program 1 times [2023-08-24 11:49:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:49:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237475358] [2023-08-24 11:49:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:49:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:49:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:49:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:49:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:49:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237475358] [2023-08-24 11:49:57,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237475358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:49:57,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:49:57,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:49:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469122071] [2023-08-24 11:49:57,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:49:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:49:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:49:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:49:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:49:57,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 143 [2023-08-24 11:49:57,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 26 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2023-08-24 11:49:57,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:49:57,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 143 [2023-08-24 11:49:57,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:49:57,402 INFO L124 PetriNetUnfolderBase]: 69/147 cut-off events. [2023-08-24 11:49:57,403 INFO L125 PetriNetUnfolderBase]: For 459/487 co-relation queries the response was YES. [2023-08-24 11:49:57,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 147 events. 69/147 cut-off events. For 459/487 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 561 event pairs, 12 based on Foata normal form. 12/151 useless extension candidates. Maximal degree in co-relation 590. Up to 65 conditions per place. [2023-08-24 11:49:57,404 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-24 11:49:57,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 303 flow [2023-08-24 11:49:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:49:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:49:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 396 transitions. [2023-08-24 11:49:57,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2023-08-24 11:49:57,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 396 transitions. [2023-08-24 11:49:57,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 396 transitions. [2023-08-24 11:49:57,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:49:57,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 396 transitions. [2023-08-24 11:49:57,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 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) [2023-08-24 11:49:57,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-08-24 11:49:57,408 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-08-24 11:49:57,408 INFO L175 Difference]: Start difference. First operand has 43 places, 26 transitions, 174 flow. Second operand 5 states and 396 transitions. [2023-08-24 11:49:57,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 303 flow [2023-08-24 11:49:57,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 286 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 11:49:57,410 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-24 11:49:57,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-24 11:49:57,411 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-08-24 11:49:57,411 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-24 11:49:57,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2023-08-24 11:49:57,413 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 11:49:57,414 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 11:49:57,414 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 11:49:57,414 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 11:49:57,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 11:49:57,414 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:49:57,417 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 11:49:57,417 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 11:49:57,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 11:49:57 BasicIcfg [2023-08-24 11:49:57,419 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 11:49:57,420 INFO L158 Benchmark]: Toolchain (without parser) took 5621.01ms. Allocated memory was 364.9MB in the beginning and 484.4MB in the end (delta: 119.5MB). Free memory was 339.4MB in the beginning and 345.9MB in the end (delta: -6.5MB). Peak memory consumption was 114.7MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,420 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 364.9MB. Free memory is still 341.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:49:57,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.98ms. Allocated memory is still 364.9MB. Free memory was 339.4MB in the beginning and 319.0MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,421 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.31ms. Allocated memory is still 364.9MB. Free memory was 319.0MB in the beginning and 316.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,421 INFO L158 Benchmark]: Boogie Preprocessor took 32.93ms. Allocated memory is still 364.9MB. Free memory was 316.9MB in the beginning and 315.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,421 INFO L158 Benchmark]: RCFGBuilder took 428.73ms. Allocated memory is still 364.9MB. Free memory was 315.3MB in the beginning and 301.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,422 INFO L158 Benchmark]: TraceAbstraction took 4582.24ms. Allocated memory was 364.9MB in the beginning and 484.4MB in the end (delta: 119.5MB). Free memory was 300.6MB in the beginning and 345.9MB in the end (delta: -45.2MB). Peak memory consumption was 76.9MB. Max. memory is 16.0GB. [2023-08-24 11:49:57,423 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 364.9MB. Free memory is still 341.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 511.98ms. Allocated memory is still 364.9MB. Free memory was 339.4MB in the beginning and 319.0MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.31ms. Allocated memory is still 364.9MB. Free memory was 319.0MB in the beginning and 316.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.93ms. Allocated memory is still 364.9MB. Free memory was 316.9MB in the beginning and 315.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 428.73ms. Allocated memory is still 364.9MB. Free memory was 315.3MB in the beginning and 301.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4582.24ms. Allocated memory was 364.9MB in the beginning and 484.4MB in the end (delta: 119.5MB). Free memory was 300.6MB in the beginning and 345.9MB in the end (delta: -45.2MB). Peak memory consumption was 76.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 79 PlacesBefore, 27 PlacesAfterwards, 70 TransitionsBefore, 18 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 2098 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1327, independent: 1243, independent conditional: 0, independent unconditional: 1243, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 585, independent: 561, independent conditional: 0, independent unconditional: 561, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1327, independent: 682, independent conditional: 0, independent unconditional: 682, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 585, unknown conditional: 0, unknown unconditional: 585] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 108 locations, 4 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: 4.4s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 90 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 260 IncrementalHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 8 mSDtfsCounter, 260 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=4, InterpolantAutomatonStates: 32, 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, 1.0s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 385 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 11:49:57,444 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...