/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/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:33:32,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:33:32,336 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 12:33:32,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:33:32,341 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:33:32,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:33:32,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:33:32,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:33:32,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:33:32,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:33:32,367 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:33:32,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:33:32,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:33:32,367 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:33:32,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:33:32,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:33:32,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:33:32,368 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:33:32,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:33:32,369 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:33:32,369 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:33:32,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:33:32,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:33:32,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:33:32,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:33:32,375 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:33:32,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:33:32,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:33:32,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:33:32,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:33:32,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:33:32,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:33:32,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:33:32,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:33:32,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:33:32,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:33:32,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:33:32,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:33:32,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:33:32,643 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:33:32,644 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:33:32,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-08-24 12:33:33,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:33:33,853 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:33:33,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-08-24 12:33:33,864 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a534efe/a183e20dcc5f45eb924dbb171e1bbf6a/FLAG74dfc23b9 [2023-08-24 12:33:33,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a534efe/a183e20dcc5f45eb924dbb171e1bbf6a [2023-08-24 12:33:33,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:33:33,876 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:33:33,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:33:33,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:33:33,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:33:33,879 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:33:33" (1/1) ... [2023-08-24 12:33:33,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb35573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:33, skipping insertion in model container [2023-08-24 12:33:33,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:33:33" (1/1) ... [2023-08-24 12:33:33,910 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:33:34,010 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-08-24 12:33:34,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:33:34,147 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:33:34,156 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-08-24 12:33:34,170 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-24 12:33:34,172 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-24 12:33:34,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:33:34,227 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:33:34,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34 WrapperNode [2023-08-24 12:33:34,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:33:34,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:33:34,229 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:33:34,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:33:34,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,256 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,281 INFO L138 Inliner]: procedures = 165, calls = 35, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 119 [2023-08-24 12:33:34,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:33:34,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:33:34,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:33:34,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:33:34,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,295 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:33:34,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:33:34,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:33:34,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:33:34,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (1/1) ... [2023-08-24 12:33:34,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:33:34,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:34,364 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 12:33:34,406 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 12:33:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:33:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-24 12:33:34,428 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:33:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:33:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:33:34,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:33:34,430 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 12:33:34,531 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:33:34,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:33:34,744 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:33:34,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:33:34,752 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 12:33:34,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:33:34 BoogieIcfgContainer [2023-08-24 12:33:34,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:33:34,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:33:34,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:33:34,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:33:34,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:33:33" (1/3) ... [2023-08-24 12:33:34,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b0a261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:33:34, skipping insertion in model container [2023-08-24 12:33:34,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:34" (2/3) ... [2023-08-24 12:33:34,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b0a261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:33:34, skipping insertion in model container [2023-08-24 12:33:34,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:33:34" (3/3) ... [2023-08-24 12:33:34,760 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-08-24 12:33:34,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:33:34,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 12:33:34,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:33:34,839 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 12:33:34,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 263 flow [2023-08-24 12:33:34,928 INFO L124 PetriNetUnfolderBase]: 10/128 cut-off events. [2023-08-24 12:33:34,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:34,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 128 events. 10/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 221 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2023-08-24 12:33:34,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 263 flow [2023-08-24 12:33:34,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 128 transitions, 259 flow [2023-08-24 12:33:34,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:34,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 128 transitions, 259 flow [2023-08-24 12:33:34,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 128 transitions, 259 flow [2023-08-24 12:33:34,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 128 transitions, 259 flow [2023-08-24 12:33:34,994 INFO L124 PetriNetUnfolderBase]: 10/128 cut-off events. [2023-08-24 12:33:34,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:34,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 128 events. 10/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 221 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2023-08-24 12:33:34,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 4032 [2023-08-24 12:33:38,152 INFO L134 LiptonReduction]: Checked pairs total: 5565 [2023-08-24 12:33:38,152 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-24 12:33:38,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:33:38,169 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;@2e36e1e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:38,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 12:33:38,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:38,181 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 12:33:38,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:38,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:38,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:33:38,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:38,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1947894331, now seen corresponding path program 1 times [2023-08-24 12:33:38,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901309588] [2023-08-24 12:33:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:38,606 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 12:33:38,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:38,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901309588] [2023-08-24 12:33:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901309588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:38,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:38,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:33:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515819175] [2023-08-24 12:33:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 12:33:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 12:33:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 12:33:38,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 255 [2023-08-24 12:33:38,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 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 12:33:38,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:38,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 255 [2023-08-24 12:33:38,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:38,757 INFO L124 PetriNetUnfolderBase]: 135/242 cut-off events. [2023-08-24 12:33:38,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 242 events. 135/242 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 719 event pairs, 54 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 479. Up to 198 conditions per place. [2023-08-24 12:33:38,763 INFO L140 encePairwiseOnDemand]: 248/255 looper letters, 36 selfloop transitions, 4 changer transitions 2/43 dead transitions. [2023-08-24 12:33:38,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 43 transitions, 173 flow [2023-08-24 12:33:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:33:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:33:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 412 transitions. [2023-08-24 12:33:38,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403921568627451 [2023-08-24 12:33:38,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 412 transitions. [2023-08-24 12:33:38,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 412 transitions. [2023-08-24 12:33:38,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:38,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 412 transitions. [2023-08-24 12:33:38,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 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 12:33:38,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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 12:33:38,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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 12:33:38,794 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 57 flow. Second operand 4 states and 412 transitions. [2023-08-24 12:33:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 43 transitions, 173 flow [2023-08-24 12:33:38,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:33:38,798 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 79 flow [2023-08-24 12:33:38,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-08-24 12:33:38,802 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-24 12:33:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 79 flow [2023-08-24 12:33:38,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 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 12:33:38,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:38,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:33:38,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:38,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash -602994077, now seen corresponding path program 1 times [2023-08-24 12:33:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:38,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033719340] [2023-08-24 12:33:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:38,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:39,066 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 12:33:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:39,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033719340] [2023-08-24 12:33:39,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033719340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:39,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:39,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:33:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756946294] [2023-08-24 12:33:39,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:33:39,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:33:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:33:39,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 255 [2023-08-24 12:33:39,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 12:33:39,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:39,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 255 [2023-08-24 12:33:39,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:39,142 INFO L124 PetriNetUnfolderBase]: 197/359 cut-off events. [2023-08-24 12:33:39,142 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-24 12:33:39,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 359 events. 197/359 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1143 event pairs, 39 based on Foata normal form. 14/308 useless extension candidates. Maximal degree in co-relation 781. Up to 226 conditions per place. [2023-08-24 12:33:39,143 INFO L140 encePairwiseOnDemand]: 249/255 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-24 12:33:39,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 211 flow [2023-08-24 12:33:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:33:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:33:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-08-24 12:33:39,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44052287581699345 [2023-08-24 12:33:39,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-08-24 12:33:39,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-08-24 12:33:39,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:39,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-08-24 12:33:39,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 12:33:39,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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 12:33:39,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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 12:33:39,148 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 79 flow. Second operand 3 states and 337 transitions. [2023-08-24 12:33:39,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 211 flow [2023-08-24 12:33:39,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:33:39,149 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 114 flow [2023-08-24 12:33:39,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-08-24 12:33:39,150 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-24 12:33:39,150 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 114 flow [2023-08-24 12:33:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 12:33:39,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:39,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 12:33:39,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:39,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1201990419, now seen corresponding path program 2 times [2023-08-24 12:33:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733219899] [2023-08-24 12:33:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:39,278 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 12:33:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733219899] [2023-08-24 12:33:39,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733219899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:39,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:39,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:33:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351411106] [2023-08-24 12:33:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 12:33:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 12:33:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 12:33:39,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 255 [2023-08-24 12:33:39,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:39,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:39,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 255 [2023-08-24 12:33:39,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:39,329 INFO L124 PetriNetUnfolderBase]: 29/78 cut-off events. [2023-08-24 12:33:39,329 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-24 12:33:39,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 154 event pairs, 1 based on Foata normal form. 12/83 useless extension candidates. Maximal degree in co-relation 193. Up to 47 conditions per place. [2023-08-24 12:33:39,330 INFO L140 encePairwiseOnDemand]: 250/255 looper letters, 22 selfloop transitions, 4 changer transitions 2/29 dead transitions. [2023-08-24 12:33:39,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 151 flow [2023-08-24 12:33:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:33:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:33:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-08-24 12:33:39,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990196078431373 [2023-08-24 12:33:39,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-08-24 12:33:39,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-08-24 12:33:39,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:39,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-08-24 12:33:39,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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 12:33:39,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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 12:33:39,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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 12:33:39,334 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 114 flow. Second operand 4 states and 407 transitions. [2023-08-24 12:33:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 151 flow [2023-08-24 12:33:39,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 141 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 12:33:39,336 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 86 flow [2023-08-24 12:33:39,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-24 12:33:39,336 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2023-08-24 12:33:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 86 flow [2023-08-24 12:33:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:39,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:39,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:33:39,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:39,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash 209008542, now seen corresponding path program 1 times [2023-08-24 12:33:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792994475] [2023-08-24 12:33:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:39,575 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 12:33:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792994475] [2023-08-24 12:33:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792994475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:39,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:39,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 12:33:39,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366658943] [2023-08-24 12:33:39,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:39,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 12:33:39,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 12:33:39,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 12:33:39,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 255 [2023-08-24 12:33:39,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 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 12:33:39,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:39,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 255 [2023-08-24 12:33:39,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:39,693 INFO L124 PetriNetUnfolderBase]: 29/89 cut-off events. [2023-08-24 12:33:39,693 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-24 12:33:39,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 89 events. 29/89 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 211 event pairs, 9 based on Foata normal form. 2/83 useless extension candidates. Maximal degree in co-relation 219. Up to 58 conditions per place. [2023-08-24 12:33:39,694 INFO L140 encePairwiseOnDemand]: 245/255 looper letters, 34 selfloop transitions, 8 changer transitions 1/44 dead transitions. [2023-08-24 12:33:39,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 44 transitions, 226 flow [2023-08-24 12:33:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 12:33:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 12:33:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 727 transitions. [2023-08-24 12:33:39,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35637254901960785 [2023-08-24 12:33:39,696 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 727 transitions. [2023-08-24 12:33:39,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 727 transitions. [2023-08-24 12:33:39,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:39,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 727 transitions. [2023-08-24 12:33:39,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.875) internal successors, (727), 8 states have internal predecessors, (727), 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 12:33:39,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 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 12:33:39,700 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 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 12:33:39,700 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 86 flow. Second operand 8 states and 727 transitions. [2023-08-24 12:33:39,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 44 transitions, 226 flow [2023-08-24 12:33:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 210 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-24 12:33:39,702 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 144 flow [2023-08-24 12:33:39,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=144, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-24 12:33:39,703 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-24 12:33:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 144 flow [2023-08-24 12:33:39,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 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 12:33:39,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:39,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:39,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:33:39,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:39,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1476091152, now seen corresponding path program 1 times [2023-08-24 12:33:39,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:39,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140889184] [2023-08-24 12:33:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:39,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:39,784 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 12:33:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140889184] [2023-08-24 12:33:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140889184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:33:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141085747] [2023-08-24 12:33:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 12:33:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 12:33:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 12:33:39,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 255 [2023-08-24 12:33:39,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 12:33:39,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:39,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 255 [2023-08-24 12:33:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:39,857 INFO L124 PetriNetUnfolderBase]: 37/105 cut-off events. [2023-08-24 12:33:39,859 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-24 12:33:39,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 105 events. 37/105 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 3 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 292. Up to 34 conditions per place. [2023-08-24 12:33:39,864 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 43 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2023-08-24 12:33:39,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 345 flow [2023-08-24 12:33:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:33:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:33:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2023-08-24 12:33:39,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976470588235294 [2023-08-24 12:33:39,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2023-08-24 12:33:39,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2023-08-24 12:33:39,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:39,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2023-08-24 12:33:39,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 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 12:33:39,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 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 12:33:39,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 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 12:33:39,869 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 144 flow. Second operand 5 states and 507 transitions. [2023-08-24 12:33:39,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 345 flow [2023-08-24 12:33:39,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 334 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 12:33:39,874 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 195 flow [2023-08-24 12:33:39,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-24 12:33:39,877 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2023-08-24 12:33:39,877 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 195 flow [2023-08-24 12:33:39,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 12:33:39,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:39,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:39,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 12:33:39,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:39,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:39,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1536596314, now seen corresponding path program 2 times [2023-08-24 12:33:39,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:39,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820491275] [2023-08-24 12:33:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:39,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:40,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:40,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820491275] [2023-08-24 12:33:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820491275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:40,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349171984] [2023-08-24 12:33:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 12:33:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:40,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:33:40,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:33:40,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 12:33:40,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 12:33:40,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 12:33:40,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:40,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-08-24 12:33:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 12:33:40,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:33:40,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 12:33:40,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 12:33:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:40,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 12:33:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349171984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:40,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 12:33:40,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-24 12:33:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206103151] [2023-08-24 12:33:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:40,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 12:33:40,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 12:33:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-24 12:33:40,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 255 [2023-08-24 12:33:40,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 195 flow. Second operand has 10 states, 10 states have (on average 86.6) internal successors, (866), 10 states have internal predecessors, (866), 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 12:33:40,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:40,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 255 [2023-08-24 12:33:40,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:40,820 INFO L124 PetriNetUnfolderBase]: 35/107 cut-off events. [2023-08-24 12:33:40,820 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-24 12:33:40,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 107 events. 35/107 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 255 event pairs, 5 based on Foata normal form. 4/111 useless extension candidates. Maximal degree in co-relation 337. Up to 55 conditions per place. [2023-08-24 12:33:40,821 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 45 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-08-24 12:33:40,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 394 flow [2023-08-24 12:33:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 12:33:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 12:33:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 907 transitions. [2023-08-24 12:33:40,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35568627450980395 [2023-08-24 12:33:40,823 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 907 transitions. [2023-08-24 12:33:40,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 907 transitions. [2023-08-24 12:33:40,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:40,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 907 transitions. [2023-08-24 12:33:40,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 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 12:33:40,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 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 12:33:40,828 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 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 12:33:40,828 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 195 flow. Second operand 10 states and 907 transitions. [2023-08-24 12:33:40,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 394 flow [2023-08-24 12:33:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 386 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:33:40,830 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 253 flow [2023-08-24 12:33:40,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-24 12:33:40,830 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-08-24 12:33:40,830 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 253 flow [2023-08-24 12:33:40,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.6) internal successors, (866), 10 states have internal predecessors, (866), 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 12:33:40,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:40,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:40,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:33:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 12:33:41,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:41,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1701953452, now seen corresponding path program 1 times [2023-08-24 12:33:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837792896] [2023-08-24 12:33:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837792896] [2023-08-24 12:33:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837792896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593677705] [2023-08-24 12:33:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:41,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:33:41,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:33:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:41,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-24 12:33:41,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:41,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-08-24 12:33:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 12:33:41,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:33:41,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-24 12:33:41,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-24 12:33:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:41,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:33:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593677705] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:42,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 12:33:42,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 8] total 29 [2023-08-24 12:33:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508843840] [2023-08-24 12:33:42,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:42,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 12:33:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 12:33:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-08-24 12:33:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 255 [2023-08-24 12:33:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 253 flow. Second operand has 12 states, 12 states have (on average 80.5) internal successors, (966), 12 states have internal predecessors, (966), 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 12:33:42,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:42,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 255 [2023-08-24 12:33:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:42,981 INFO L124 PetriNetUnfolderBase]: 86/239 cut-off events. [2023-08-24 12:33:42,981 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2023-08-24 12:33:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 239 events. 86/239 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 794 event pairs, 12 based on Foata normal form. 20/259 useless extension candidates. Maximal degree in co-relation 790. Up to 59 conditions per place. [2023-08-24 12:33:42,983 INFO L140 encePairwiseOnDemand]: 240/255 looper letters, 58 selfloop transitions, 39 changer transitions 32/130 dead transitions. [2023-08-24 12:33:42,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 130 transitions, 923 flow [2023-08-24 12:33:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 12:33:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 12:33:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2177 transitions. [2023-08-24 12:33:42,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3283559577677225 [2023-08-24 12:33:42,988 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2177 transitions. [2023-08-24 12:33:42,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2177 transitions. [2023-08-24 12:33:42,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:42,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2177 transitions. [2023-08-24 12:33:42,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 83.73076923076923) internal successors, (2177), 26 states have internal predecessors, (2177), 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 12:33:43,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 255.0) internal successors, (6885), 27 states have internal predecessors, (6885), 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 12:33:43,005 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 255.0) internal successors, (6885), 27 states have internal predecessors, (6885), 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 12:33:43,005 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 253 flow. Second operand 26 states and 2177 transitions. [2023-08-24 12:33:43,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 130 transitions, 923 flow [2023-08-24 12:33:43,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 903 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-24 12:33:43,009 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 569 flow [2023-08-24 12:33:43,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=569, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2023-08-24 12:33:43,010 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-08-24 12:33:43,011 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 569 flow [2023-08-24 12:33:43,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.5) internal successors, (966), 12 states have internal predecessors, (966), 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 12:33:43,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:43,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:43,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:33:43,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-24 12:33:43,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr1ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:33:43,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1241418520, now seen corresponding path program 2 times [2023-08-24 12:33:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523101761] [2023-08-24 12:33:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523101761] [2023-08-24 12:33:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523101761] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390611536] [2023-08-24 12:33:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 12:33:43,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:43,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:33:43,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 12:33:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 12:33:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 12:33:44,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 12:33:44,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:44,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 12:33:44,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 12:33:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:44,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:33:44,605 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 12:33:44,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-08-24 12:33:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:44,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390611536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:33:44,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:33:44,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 35 [2023-08-24 12:33:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301666806] [2023-08-24 12:33:44,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:33:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 12:33:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 12:33:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 12:33:44,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 255 [2023-08-24 12:33:44,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 569 flow. Second operand has 35 states, 35 states have (on average 80.91428571428571) internal successors, (2832), 35 states have internal predecessors, (2832), 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 12:33:44,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:44,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 255 [2023-08-24 12:33:44,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:45,649 INFO L124 PetriNetUnfolderBase]: 38/130 cut-off events. [2023-08-24 12:33:45,649 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-08-24 12:33:45,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 130 events. 38/130 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 329 event pairs, 5 based on Foata normal form. 12/142 useless extension candidates. Maximal degree in co-relation 519. Up to 33 conditions per place. [2023-08-24 12:33:45,650 INFO L140 encePairwiseOnDemand]: 241/255 looper letters, 0 selfloop transitions, 0 changer transitions 77/77 dead transitions. [2023-08-24 12:33:45,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 693 flow [2023-08-24 12:33:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 12:33:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 12:33:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2052 transitions. [2023-08-24 12:33:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32188235294117645 [2023-08-24 12:33:45,654 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2052 transitions. [2023-08-24 12:33:45,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2052 transitions. [2023-08-24 12:33:45,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:45,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2052 transitions. [2023-08-24 12:33:45,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 82.08) internal successors, (2052), 25 states have internal predecessors, (2052), 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 12:33:45,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 255.0) internal successors, (6630), 26 states have internal predecessors, (6630), 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 12:33:45,664 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 255.0) internal successors, (6630), 26 states have internal predecessors, (6630), 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 12:33:45,664 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 569 flow. Second operand 25 states and 2052 transitions. [2023-08-24 12:33:45,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 693 flow [2023-08-24 12:33:45,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 592 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-24 12:33:45,667 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2023-08-24 12:33:45,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=0, PETRI_PLACES=85, PETRI_TRANSITIONS=0} [2023-08-24 12:33:45,668 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-08-24 12:33:45,668 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2023-08-24 12:33:45,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.91428571428571) internal successors, (2832), 35 states have internal predecessors, (2832), 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 12:33:45,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 12:33:45,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 12:33:45,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 12:33:45,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 12:33:45,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 12:33:45,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 12:33:45,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:45,876 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-08-24 12:33:45,879 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 12:33:45,879 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 12:33:45,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 12:33:45 BasicIcfg [2023-08-24 12:33:45,881 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 12:33:45,882 INFO L158 Benchmark]: Toolchain (without parser) took 12006.18ms. Allocated memory was 394.3MB in the beginning and 589.3MB in the end (delta: 195.0MB). Free memory was 367.9MB in the beginning and 345.1MB in the end (delta: 22.8MB). Peak memory consumption was 220.9MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,882 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 394.3MB. Free memory was 370.5MB in the beginning and 370.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 12:33:45,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.52ms. Allocated memory is still 394.3MB. Free memory was 367.9MB in the beginning and 347.4MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,882 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.01ms. Allocated memory is still 394.3MB. Free memory was 347.4MB in the beginning and 345.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,883 INFO L158 Benchmark]: Boogie Preprocessor took 31.56ms. Allocated memory is still 394.3MB. Free memory was 345.3MB in the beginning and 343.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,883 INFO L158 Benchmark]: RCFGBuilder took 439.84ms. Allocated memory is still 394.3MB. Free memory was 343.2MB in the beginning and 327.2MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,883 INFO L158 Benchmark]: TraceAbstraction took 11125.83ms. Allocated memory was 394.3MB in the beginning and 589.3MB in the end (delta: 195.0MB). Free memory was 326.4MB in the beginning and 345.1MB in the end (delta: -18.7MB). Peak memory consumption was 178.9MB. Max. memory is 16.0GB. [2023-08-24 12:33:45,884 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 394.3MB. Free memory was 370.5MB in the beginning and 370.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 351.52ms. Allocated memory is still 394.3MB. Free memory was 367.9MB in the beginning and 347.4MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.01ms. Allocated memory is still 394.3MB. Free memory was 347.4MB in the beginning and 345.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.56ms. Allocated memory is still 394.3MB. Free memory was 345.3MB in the beginning and 343.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 439.84ms. Allocated memory is still 394.3MB. Free memory was 343.2MB in the beginning and 327.2MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 11125.83ms. Allocated memory was 394.3MB in the beginning and 589.3MB in the end (delta: 195.0MB). Free memory was 326.4MB in the beginning and 345.1MB in the end (delta: -18.7MB). Peak memory consumption was 178.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 122 PlacesBefore, 25 PlacesAfterwards, 128 TransitionsBefore, 27 TransitionsAfterwards, 4032 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 4 ChoiceCompositions, 126 TotalNumberOfCompositions, 5565 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4119, independent: 3965, independent conditional: 0, independent unconditional: 3965, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2365, independent: 2325, independent conditional: 0, independent unconditional: 2325, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4119, independent: 1640, independent conditional: 0, independent unconditional: 1640, dependent: 114, dependent conditional: 0, dependent unconditional: 114, unknown: 2365, unknown conditional: 0, unknown unconditional: 2365] , Statistics on independence cache: Total cache size (in pairs): 98, Positive cache size: 83, Positive conditional cache size: 0, Positive unconditional cache size: 83, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 171 locations, 5 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: 11.0s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 415 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 415 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1441 IncrementalHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 0 mSDtfsCounter, 1441 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=569occurred in iteration=7, InterpolantAutomatonStates: 85, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 203 ConstructedInterpolants, 7 QuantifiedInterpolants, 2824 SizeOfPredicates, 73 NumberOfNonLiveVariables, 681 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 22/37 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 12:33:45,899 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...