/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 09:08:38,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 09:08:38,994 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 09:08:38,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 09:08:39,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 09:08:39,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 09:08:39,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 09:08:39,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 09:08:39,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 09:08:39,039 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 09:08:39,040 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 09:08:39,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 09:08:39,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 09:08:39,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 09:08:39,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 09:08:39,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 09:08:39,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 09:08:39,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 09:08:39,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 09:08:39,042 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 09:08:39,043 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 09:08:39,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 09:08:39,044 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 09:08:39,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 09:08:39,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 09:08:39,044 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 09:08:39,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 09:08:39,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:08:39,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 09:08:39,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 09:08:39,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 09:08:39,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 09:08:39,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 09:08:39,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 09:08:39,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 09:08:39,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 09:08:39,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 09:08:39,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 09:08:39,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 09:08:39,414 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 09:08:39,414 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 09:08:39,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-27 09:08:40,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 09:08:40,788 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 09:08:40,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-27 09:08:40,811 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d02a3fe06/1ccd8bc4681d4dc09380d1edf5d10cc0/FLAG2bf7549e0 [2023-08-27 09:08:40,823 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d02a3fe06/1ccd8bc4681d4dc09380d1edf5d10cc0 [2023-08-27 09:08:40,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 09:08:40,826 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 09:08:40,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 09:08:40,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 09:08:40,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 09:08:40,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:08:40" (1/1) ... [2023-08-27 09:08:40,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a55a759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:40, skipping insertion in model container [2023-08-27 09:08:40,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:08:40" (1/1) ... [2023-08-27 09:08:40,869 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 09:08:41,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:08:41,196 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 09:08:41,223 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [208] [2023-08-27 09:08:41,225 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [209] [2023-08-27 09:08:41,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:08:41,300 INFO L206 MainTranslator]: Completed translation [2023-08-27 09:08:41,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41 WrapperNode [2023-08-27 09:08:41,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 09:08:41,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 09:08:41,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 09:08:41,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 09:08:41,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,374 INFO L138 Inliner]: procedures = 168, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 155 [2023-08-27 09:08:41,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 09:08:41,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 09:08:41,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 09:08:41,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 09:08:41,383 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,405 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,405 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 09:08:41,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 09:08:41,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 09:08:41,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 09:08:41,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (1/1) ... [2023-08-27 09:08:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:08:41,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:41,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 09:08:41,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 09:08:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 09:08:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-27 09:08:41,503 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-27 09:08:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 09:08:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 09:08:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-27 09:08:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 09:08:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 09:08:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 09:08:41,506 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 09:08:41,674 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 09:08:41,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 09:08:41,903 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 09:08:41,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 09:08:41,911 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 09:08:41,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:08:41 BoogieIcfgContainer [2023-08-27 09:08:41,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 09:08:41,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 09:08:41,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 09:08:41,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 09:08:41,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:08:40" (1/3) ... [2023-08-27 09:08:41,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26baa08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:08:41, skipping insertion in model container [2023-08-27 09:08:41,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:41" (2/3) ... [2023-08-27 09:08:41,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26baa08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:08:41, skipping insertion in model container [2023-08-27 09:08:41,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:08:41" (3/3) ... [2023-08-27 09:08:41,933 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-08-27 09:08:41,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 09:08:41,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-27 09:08:41,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 09:08:42,062 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 09:08:42,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 168 transitions, 352 flow [2023-08-27 09:08:42,190 INFO L124 PetriNetUnfolderBase]: 14/166 cut-off events. [2023-08-27 09:08:42,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:08:42,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 166 events. 14/166 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 373 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-27 09:08:42,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 168 transitions, 352 flow [2023-08-27 09:08:42,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 157 transitions, 323 flow [2023-08-27 09:08:42,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:08:42,227 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 157 transitions, 323 flow [2023-08-27 09:08:42,234 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 157 transitions, 323 flow [2023-08-27 09:08:42,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 157 transitions, 323 flow [2023-08-27 09:08:42,284 INFO L124 PetriNetUnfolderBase]: 14/157 cut-off events. [2023-08-27 09:08:42,284 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 09:08:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 157 events. 14/157 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 354 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-27 09:08:42,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 6602 [2023-08-27 09:08:46,977 INFO L134 LiptonReduction]: Checked pairs total: 13935 [2023-08-27 09:08:46,978 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-27 09:08:46,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:08:46,995 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;@3b7efc8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:08:46,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-27 09:08:46,999 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:08:46,999 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-08-27 09:08:47,000 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 09:08:47,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:47,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 09:08:47,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:47,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1411362533, now seen corresponding path program 1 times [2023-08-27 09:08:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:47,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485203149] [2023-08-27 09:08:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485203149] [2023-08-27 09:08:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485203149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:47,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981667673] [2023-08-27 09:08:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:47,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 318 [2023-08-27 09:08:47,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:47,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 318 [2023-08-27 09:08:47,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:47,651 INFO L124 PetriNetUnfolderBase]: 1047/1793 cut-off events. [2023-08-27 09:08:47,651 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-27 09:08:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3532 conditions, 1793 events. 1047/1793 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9011 event pairs, 370 based on Foata normal form. 44/1218 useless extension candidates. Maximal degree in co-relation 3273. Up to 992 conditions per place. [2023-08-27 09:08:47,667 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 61 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-27 09:08:47,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 277 flow [2023-08-27 09:08:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-27 09:08:47,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2023-08-27 09:08:47,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-27 09:08:47,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-27 09:08:47,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:47,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-27 09:08:47,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,702 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 93 flow. Second operand 3 states and 488 transitions. [2023-08-27 09:08:47,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 277 flow [2023-08-27 09:08:47,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 269 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 09:08:47,708 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 102 flow [2023-08-27 09:08:47,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-27 09:08:47,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2023-08-27 09:08:47,714 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 102 flow [2023-08-27 09:08:47,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:47,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 09:08:47,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:47,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -802653220, now seen corresponding path program 1 times [2023-08-27 09:08:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167075233] [2023-08-27 09:08:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:47,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167075233] [2023-08-27 09:08:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167075233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:47,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:47,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:47,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707347945] [2023-08-27 09:08:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:47,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:47,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:47,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 318 [2023-08-27 09:08:47,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:47,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:47,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 318 [2023-08-27 09:08:47,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:48,119 INFO L124 PetriNetUnfolderBase]: 1469/2538 cut-off events. [2023-08-27 09:08:48,119 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-27 09:08:48,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 2538 events. 1469/2538 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14404 event pairs, 800 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 2133. Up to 1734 conditions per place. [2023-08-27 09:08:48,132 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 61 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-27 09:08:48,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 287 flow [2023-08-27 09:08:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-27 09:08:48,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178197064989518 [2023-08-27 09:08:48,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-27 09:08:48,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-27 09:08:48,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:48,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-27 09:08:48,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,140 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 102 flow. Second operand 3 states and 494 transitions. [2023-08-27 09:08:48,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 287 flow [2023-08-27 09:08:48,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:48,142 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 116 flow [2023-08-27 09:08:48,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-27 09:08:48,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-27 09:08:48,143 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 116 flow [2023-08-27 09:08:48,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:48,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:48,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 09:08:48,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:48,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 889883699, now seen corresponding path program 1 times [2023-08-27 09:08:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888382573] [2023-08-27 09:08:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:48,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:48,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792121625] [2023-08-27 09:08:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:48,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:48,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:48,169 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) [2023-08-27 09:08:48,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 09:08:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:48,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 09:08:48,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:48,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888382573] [2023-08-27 09:08:48,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792121625] [2023-08-27 09:08:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792121625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:48,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:48,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482693937] [2023-08-27 09:08:48,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:48,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:08:48,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 09:08:48,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:48,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 09:08:48,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:48,594 INFO L124 PetriNetUnfolderBase]: 1561/2737 cut-off events. [2023-08-27 09:08:48,594 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2023-08-27 09:08:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 2737 events. 1561/2737 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16348 event pairs, 651 based on Foata normal form. 0/2009 useless extension candidates. Maximal degree in co-relation 5249. Up to 1319 conditions per place. [2023-08-27 09:08:48,610 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 72 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2023-08-27 09:08:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 84 transitions, 373 flow [2023-08-27 09:08:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-27 09:08:48,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485062893081761 [2023-08-27 09:08:48,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-27 09:08:48,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-27 09:08:48,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:48,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-27 09:08:48,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,618 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 116 flow. Second operand 4 states and 617 transitions. [2023-08-27 09:08:48,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 84 transitions, 373 flow [2023-08-27 09:08:48,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 84 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:48,621 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 156 flow [2023-08-27 09:08:48,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-27 09:08:48,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-08-27 09:08:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 156 flow [2023-08-27 09:08:48,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:48,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:48,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:48,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:48,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1244802897, now seen corresponding path program 1 times [2023-08-27 09:08:48,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239538883] [2023-08-27 09:08:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239538883] [2023-08-27 09:08:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239538883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674883174] [2023-08-27 09:08:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:48,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-08-27 09:08:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:48,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-08-27 09:08:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:49,211 INFO L124 PetriNetUnfolderBase]: 1842/3083 cut-off events. [2023-08-27 09:08:49,211 INFO L125 PetriNetUnfolderBase]: For 1399/1399 co-relation queries the response was YES. [2023-08-27 09:08:49,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 3083 events. 1842/3083 cut-off events. For 1399/1399 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16495 event pairs, 819 based on Foata normal form. 0/2356 useless extension candidates. Maximal degree in co-relation 6788. Up to 1508 conditions per place. [2023-08-27 09:08:49,231 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 68 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-27 09:08:49,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 403 flow [2023-08-27 09:08:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-27 09:08:49,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293501048218029 [2023-08-27 09:08:49,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-27 09:08:49,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-27 09:08:49,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:49,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-27 09:08:49,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,239 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 156 flow. Second operand 3 states and 505 transitions. [2023-08-27 09:08:49,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 403 flow [2023-08-27 09:08:49,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:49,244 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 167 flow [2023-08-27 09:08:49,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-27 09:08:49,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-27 09:08:49,245 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 167 flow [2023-08-27 09:08:49,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 09:08:49,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:49,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1244832060, now seen corresponding path program 1 times [2023-08-27 09:08:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:49,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133349177] [2023-08-27 09:08:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:49,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133349177] [2023-08-27 09:08:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133349177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:49,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:49,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957166467] [2023-08-27 09:08:49,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:49,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-08-27 09:08:49,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:49,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-08-27 09:08:49,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:49,650 INFO L124 PetriNetUnfolderBase]: 2416/4265 cut-off events. [2023-08-27 09:08:49,650 INFO L125 PetriNetUnfolderBase]: For 2213/2229 co-relation queries the response was YES. [2023-08-27 09:08:49,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10365 conditions, 4265 events. 2416/4265 cut-off events. For 2213/2229 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26145 event pairs, 1275 based on Foata normal form. 4/3562 useless extension candidates. Maximal degree in co-relation 9664. Up to 2629 conditions per place. [2023-08-27 09:08:49,681 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 72 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-27 09:08:49,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 80 transitions, 441 flow [2023-08-27 09:08:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-27 09:08:49,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324947589098532 [2023-08-27 09:08:49,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-27 09:08:49,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-27 09:08:49,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:49,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-27 09:08:49,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,688 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 167 flow. Second operand 3 states and 508 transitions. [2023-08-27 09:08:49,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 80 transitions, 441 flow [2023-08-27 09:08:49,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 80 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:49,693 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 180 flow [2023-08-27 09:08:49,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-27 09:08:49,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-27 09:08:49,694 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 180 flow [2023-08-27 09:08:49,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:49,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 09:08:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 09:08:49,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:49,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1396574429, now seen corresponding path program 1 times [2023-08-27 09:08:49,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:49,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793227227] [2023-08-27 09:08:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793227227] [2023-08-27 09:08:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793227227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:08:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411967267] [2023-08-27 09:08:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:49,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:49,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:49,757 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) [2023-08-27 09:08:49,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 09:08:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:49,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:08:49,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:49,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411967267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:49,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 09:08:49,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 09:08:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835562318] [2023-08-27 09:08:49,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:08:49,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 318 [2023-08-27 09:08:49,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:49,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:49,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 318 [2023-08-27 09:08:49,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:50,193 INFO L124 PetriNetUnfolderBase]: 2390/4101 cut-off events. [2023-08-27 09:08:50,194 INFO L125 PetriNetUnfolderBase]: For 1988/1988 co-relation queries the response was YES. [2023-08-27 09:08:50,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10708 conditions, 4101 events. 2390/4101 cut-off events. For 1988/1988 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24499 event pairs, 67 based on Foata normal form. 0/3615 useless extension candidates. Maximal degree in co-relation 10274. Up to 3230 conditions per place. [2023-08-27 09:08:50,226 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 74 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-27 09:08:50,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 83 transitions, 452 flow [2023-08-27 09:08:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 643 transitions. [2023-08-27 09:08:50,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055031446540881 [2023-08-27 09:08:50,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 643 transitions. [2023-08-27 09:08:50,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 643 transitions. [2023-08-27 09:08:50,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:50,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 643 transitions. [2023-08-27 09:08:50,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,234 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 180 flow. Second operand 4 states and 643 transitions. [2023-08-27 09:08:50,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 83 transitions, 452 flow [2023-08-27 09:08:50,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:50,240 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 180 flow [2023-08-27 09:08:50,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-27 09:08:50,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-27 09:08:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 180 flow [2023-08-27 09:08:50,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:50,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 09:08:50,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:50,456 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,SelfDestructingSolverStorable5 [2023-08-27 09:08:50,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:50,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1396574497, now seen corresponding path program 1 times [2023-08-27 09:08:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35525827] [2023-08-27 09:08:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:50,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:50,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35525827] [2023-08-27 09:08:50,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35525827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:50,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:50,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:50,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177054420] [2023-08-27 09:08:50,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:50,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:50,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:50,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:50,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 318 [2023-08-27 09:08:50,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:50,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 318 [2023-08-27 09:08:50,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:50,811 INFO L124 PetriNetUnfolderBase]: 1960/3497 cut-off events. [2023-08-27 09:08:50,812 INFO L125 PetriNetUnfolderBase]: For 2228/2228 co-relation queries the response was YES. [2023-08-27 09:08:50,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9044 conditions, 3497 events. 1960/3497 cut-off events. For 2228/2228 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 20686 event pairs, 499 based on Foata normal form. 150/3285 useless extension candidates. Maximal degree in co-relation 4266. Up to 2317 conditions per place. [2023-08-27 09:08:50,828 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 54 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-08-27 09:08:50,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 356 flow [2023-08-27 09:08:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-27 09:08:50,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062893081761006 [2023-08-27 09:08:50,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-27 09:08:50,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-27 09:08:50,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:50,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-27 09:08:50,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,834 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 180 flow. Second operand 3 states and 483 transitions. [2023-08-27 09:08:50,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 356 flow [2023-08-27 09:08:50,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:50,840 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 194 flow [2023-08-27 09:08:50,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-27 09:08:50,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-27 09:08:50,841 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 194 flow [2023-08-27 09:08:50,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:50,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:50,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 09:08:50,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:50,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1116499706, now seen corresponding path program 1 times [2023-08-27 09:08:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356607082] [2023-08-27 09:08:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:50,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356607082] [2023-08-27 09:08:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356607082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:08:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594285435] [2023-08-27 09:08:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:50,889 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) [2023-08-27 09:08:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 09:08:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:51,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:08:51,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:51,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:51,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594285435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:51,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 09:08:51,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 09:08:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822676684] [2023-08-27 09:08:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:08:51,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-08-27 09:08:51,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:51,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-08-27 09:08:51,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:51,332 INFO L124 PetriNetUnfolderBase]: 1792/3172 cut-off events. [2023-08-27 09:08:51,332 INFO L125 PetriNetUnfolderBase]: For 3742/3750 co-relation queries the response was YES. [2023-08-27 09:08:51,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8629 conditions, 3172 events. 1792/3172 cut-off events. For 3742/3750 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 17537 event pairs, 78 based on Foata normal form. 4/2913 useless extension candidates. Maximal degree in co-relation 7923. Up to 1667 conditions per place. [2023-08-27 09:08:51,351 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 90 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-27 09:08:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 626 flow [2023-08-27 09:08:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 663 transitions. [2023-08-27 09:08:51,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2023-08-27 09:08:51,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 663 transitions. [2023-08-27 09:08:51,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 663 transitions. [2023-08-27 09:08:51,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:51,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 663 transitions. [2023-08-27 09:08:51,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,358 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 194 flow. Second operand 4 states and 663 transitions. [2023-08-27 09:08:51,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 626 flow [2023-08-27 09:08:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:51,362 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 188 flow [2023-08-27 09:08:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-27 09:08:51,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-27 09:08:51,363 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 188 flow [2023-08-27 09:08:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:51,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:51,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 09:08:51,575 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 [2023-08-27 09:08:51,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:51,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1116499742, now seen corresponding path program 1 times [2023-08-27 09:08:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:51,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441145949] [2023-08-27 09:08:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:51,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:51,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441145949] [2023-08-27 09:08:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441145949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:51,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:51,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95440715] [2023-08-27 09:08:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:51,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-08-27 09:08:51,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:51,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-08-27 09:08:51,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:51,858 INFO L124 PetriNetUnfolderBase]: 1666/2990 cut-off events. [2023-08-27 09:08:51,859 INFO L125 PetriNetUnfolderBase]: For 2941/2961 co-relation queries the response was YES. [2023-08-27 09:08:51,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8074 conditions, 2990 events. 1666/2990 cut-off events. For 2941/2961 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 16600 event pairs, 330 based on Foata normal form. 8/2813 useless extension candidates. Maximal degree in co-relation 7413. Up to 1960 conditions per place. [2023-08-27 09:08:51,874 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-27 09:08:51,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 415 flow [2023-08-27 09:08:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-27 09:08:51,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2023-08-27 09:08:51,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-27 09:08:51,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-27 09:08:51,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:51,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-27 09:08:51,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,879 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 188 flow. Second operand 3 states and 490 transitions. [2023-08-27 09:08:51,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 415 flow [2023-08-27 09:08:51,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:51,883 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 197 flow [2023-08-27 09:08:51,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-27 09:08:51,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-27 09:08:51,884 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 197 flow [2023-08-27 09:08:51,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:51,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:51,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 09:08:51,885 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:51,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1068935550, now seen corresponding path program 1 times [2023-08-27 09:08:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:51,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494657314] [2023-08-27 09:08:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:51,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545624651] [2023-08-27 09:08:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:51,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:51,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:51,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:51,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 09:08:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:52,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 09:08:52,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:52,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:52,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494657314] [2023-08-27 09:08:52,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:52,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545624651] [2023-08-27 09:08:52,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545624651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:52,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:52,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 09:08:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103755164] [2023-08-27 09:08:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:08:52,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 318 [2023-08-27 09:08:52,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:52,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 318 [2023-08-27 09:08:52,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:52,257 INFO L124 PetriNetUnfolderBase]: 1369/2521 cut-off events. [2023-08-27 09:08:52,258 INFO L125 PetriNetUnfolderBase]: For 3344/3356 co-relation queries the response was YES. [2023-08-27 09:08:52,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 2521 events. 1369/2521 cut-off events. For 3344/3356 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 13631 event pairs, 1079 based on Foata normal form. 112/2525 useless extension candidates. Maximal degree in co-relation 6531. Up to 2196 conditions per place. [2023-08-27 09:08:52,271 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 35 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-27 09:08:52,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 251 flow [2023-08-27 09:08:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-27 09:08:52,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727463312368973 [2023-08-27 09:08:52,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-27 09:08:52,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-27 09:08:52,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:52,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-27 09:08:52,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,277 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 197 flow. Second operand 3 states and 451 transitions. [2023-08-27 09:08:52,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 251 flow [2023-08-27 09:08:52,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 42 transitions, 241 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 09:08:52,281 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 171 flow [2023-08-27 09:08:52,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-08-27 09:08:52,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-08-27 09:08:52,282 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 171 flow [2023-08-27 09:08:52,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:52,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:52,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:52,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:52,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:52,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1700249114, now seen corresponding path program 1 times [2023-08-27 09:08:52,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:52,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677551344] [2023-08-27 09:08:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:52,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:52,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675716260] [2023-08-27 09:08:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:52,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:52,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 09:08:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:52,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 09:08:52,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:52,633 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 09:08:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:52,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677551344] [2023-08-27 09:08:52,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675716260] [2023-08-27 09:08:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675716260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:52,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:52,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515241202] [2023-08-27 09:08:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:52,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:52,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 318 [2023-08-27 09:08:52,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:52,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 318 [2023-08-27 09:08:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:52,848 INFO L124 PetriNetUnfolderBase]: 1088/1977 cut-off events. [2023-08-27 09:08:52,849 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2023-08-27 09:08:52,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5834 conditions, 1977 events. 1088/1977 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 10172 event pairs, 269 based on Foata normal form. 134/2063 useless extension candidates. Maximal degree in co-relation 5819. Up to 1289 conditions per place. [2023-08-27 09:08:52,858 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 45 selfloop transitions, 6 changer transitions 2/57 dead transitions. [2023-08-27 09:08:52,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 357 flow [2023-08-27 09:08:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-27 09:08:52,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832285115303983 [2023-08-27 09:08:52,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-27 09:08:52,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-27 09:08:52,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:52,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-27 09:08:52,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,863 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 171 flow. Second operand 3 states and 461 transitions. [2023-08-27 09:08:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 357 flow [2023-08-27 09:08:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:52,867 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 178 flow [2023-08-27 09:08:52,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-27 09:08:52,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-27 09:08:52,868 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 178 flow [2023-08-27 09:08:52,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:52,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:52,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:52,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-27 09:08:53,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:53,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1868646620, now seen corresponding path program 1 times [2023-08-27 09:08:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826957173] [2023-08-27 09:08:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:53,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:53,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17085008] [2023-08-27 09:08:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:53,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:53,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:53,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 09:08:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:53,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 09:08:53,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:53,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826957173] [2023-08-27 09:08:53,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17085008] [2023-08-27 09:08:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17085008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802111465] [2023-08-27 09:08:53,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:08:53,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 318 [2023-08-27 09:08:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:53,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 318 [2023-08-27 09:08:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:53,758 INFO L124 PetriNetUnfolderBase]: 1200/2298 cut-off events. [2023-08-27 09:08:53,758 INFO L125 PetriNetUnfolderBase]: For 2877/2884 co-relation queries the response was YES. [2023-08-27 09:08:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6876 conditions, 2298 events. 1200/2298 cut-off events. For 2877/2884 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 12150 event pairs, 345 based on Foata normal form. 1/2251 useless extension candidates. Maximal degree in co-relation 6861. Up to 934 conditions per place. [2023-08-27 09:08:53,770 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 70 selfloop transitions, 4 changer transitions 4/84 dead transitions. [2023-08-27 09:08:53,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 521 flow [2023-08-27 09:08:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-27 09:08:53,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803459119496855 [2023-08-27 09:08:53,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-27 09:08:53,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-27 09:08:53,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:53,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-27 09:08:53,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:53,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:53,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:53,777 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 178 flow. Second operand 4 states and 611 transitions. [2023-08-27 09:08:53,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 521 flow [2023-08-27 09:08:53,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:53,785 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 197 flow [2023-08-27 09:08:53,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-27 09:08:53,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-27 09:08:53,787 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 197 flow [2023-08-27 09:08:53,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:53,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:53,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:54,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:54,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:54,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash -37973433, now seen corresponding path program 1 times [2023-08-27 09:08:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031531570] [2023-08-27 09:08:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:54,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:54,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217747075] [2023-08-27 09:08:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:54,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:54,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:54,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:54,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 09:08:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:54,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 09:08:54,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:08:54,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 09:08:54,291 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 09:08:54,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 09:08:54,348 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 13 treesize of output 15 [2023-08-27 09:08:54,420 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 51 treesize of output 44 [2023-08-27 09:08:54,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 51 treesize of output 45 [2023-08-27 09:08:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:54,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:54,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:54,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031531570] [2023-08-27 09:08:54,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217747075] [2023-08-27 09:08:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217747075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:54,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 09:08:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678488410] [2023-08-27 09:08:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 09:08:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 09:08:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-27 09:08:54,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 318 [2023-08-27 09:08:54,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:54,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:54,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 318 [2023-08-27 09:08:54,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:55,035 INFO L124 PetriNetUnfolderBase]: 1511/2878 cut-off events. [2023-08-27 09:08:55,035 INFO L125 PetriNetUnfolderBase]: For 3745/3761 co-relation queries the response was YES. [2023-08-27 09:08:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 2878 events. 1511/2878 cut-off events. For 3745/3761 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 16182 event pairs, 472 based on Foata normal form. 12/2866 useless extension candidates. Maximal degree in co-relation 8515. Up to 1377 conditions per place. [2023-08-27 09:08:55,056 INFO L140 encePairwiseOnDemand]: 310/318 looper letters, 77 selfloop transitions, 11 changer transitions 9/103 dead transitions. [2023-08-27 09:08:55,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 635 flow [2023-08-27 09:08:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 09:08:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 09:08:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 864 transitions. [2023-08-27 09:08:55,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881401617250674 [2023-08-27 09:08:55,059 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 864 transitions. [2023-08-27 09:08:55,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 864 transitions. [2023-08-27 09:08:55,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:55,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 864 transitions. [2023-08-27 09:08:55,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 318.0) internal successors, (2544), 8 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,065 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 318.0) internal successors, (2544), 8 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,065 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 197 flow. Second operand 7 states and 864 transitions. [2023-08-27 09:08:55,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 635 flow [2023-08-27 09:08:55,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 625 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:55,070 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 271 flow [2023-08-27 09:08:55,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=271, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-08-27 09:08:55,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-27 09:08:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 271 flow [2023-08-27 09:08:55,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:55,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:55,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 09:08:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:55,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:55,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1438327518, now seen corresponding path program 1 times [2023-08-27 09:08:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391074908] [2023-08-27 09:08:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:55,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395206800] [2023-08-27 09:08:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:55,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:55,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:55,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 09:08:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:55,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-27 09:08:55,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:55,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:55,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391074908] [2023-08-27 09:08:55,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395206800] [2023-08-27 09:08:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395206800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:55,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:55,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095318133] [2023-08-27 09:08:55,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:55,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-08-27 09:08:55,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:55,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-08-27 09:08:55,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:55,653 INFO L124 PetriNetUnfolderBase]: 1093/2062 cut-off events. [2023-08-27 09:08:55,653 INFO L125 PetriNetUnfolderBase]: For 3653/3653 co-relation queries the response was YES. [2023-08-27 09:08:55,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 2062 events. 1093/2062 cut-off events. For 3653/3653 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9355 event pairs, 351 based on Foata normal form. 50/2112 useless extension candidates. Maximal degree in co-relation 6437. Up to 1292 conditions per place. [2023-08-27 09:08:55,664 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 53 selfloop transitions, 2 changer transitions 7/65 dead transitions. [2023-08-27 09:08:55,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 466 flow [2023-08-27 09:08:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-27 09:08:55,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-27 09:08:55,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-27 09:08:55,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-27 09:08:55,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:55,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-27 09:08:55,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,669 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 271 flow. Second operand 3 states and 486 transitions. [2023-08-27 09:08:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 466 flow [2023-08-27 09:08:55,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 452 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:55,674 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 240 flow [2023-08-27 09:08:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2023-08-27 09:08:55,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-08-27 09:08:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 240 flow [2023-08-27 09:08:55,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:55,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:55,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:55,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:55,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 09:08:55,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:08:55,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2039589352, now seen corresponding path program 1 times [2023-08-27 09:08:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:55,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369260653] [2023-08-27 09:08:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:55,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:55,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850048292] [2023-08-27 09:08:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:55,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:55,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 09:08:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:56,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 09:08:56,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:56,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:08:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369260653] [2023-08-27 09:08:57,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850048292] [2023-08-27 09:08:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850048292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:08:57,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-27 09:08:57,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-27 09:08:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315632214] [2023-08-27 09:08:57,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-27 09:08:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 09:08:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 09:08:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-27 09:08:57,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 318 [2023-08-27 09:08:57,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 138.58333333333334) internal successors, (1663), 12 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:57,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:57,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 318 [2023-08-27 09:08:57,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:09:00,319 INFO L124 PetriNetUnfolderBase]: 895/1768 cut-off events. [2023-08-27 09:09:00,319 INFO L125 PetriNetUnfolderBase]: For 2824/2824 co-relation queries the response was YES. [2023-08-27 09:09:00,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 1768 events. 895/1768 cut-off events. For 2824/2824 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6763 event pairs, 188 based on Foata normal form. 20/1788 useless extension candidates. Maximal degree in co-relation 5535. Up to 313 conditions per place. [2023-08-27 09:09:00,328 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 116 selfloop transitions, 11 changer transitions 8/140 dead transitions. [2023-08-27 09:09:00,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 140 transitions, 937 flow [2023-08-27 09:09:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 09:09:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 09:09:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1460 transitions. [2023-08-27 09:09:00,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2023-08-27 09:09:00,333 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1460 transitions. [2023-08-27 09:09:00,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1460 transitions. [2023-08-27 09:09:00,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:09:00,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1460 transitions. [2023-08-27 09:09:00,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.0) internal successors, (1460), 10 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:00,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 318.0) internal successors, (3498), 11 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:00,341 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 318.0) internal successors, (3498), 11 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:00,341 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 240 flow. Second operand 10 states and 1460 transitions. [2023-08-27 09:09:00,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 140 transitions, 937 flow [2023-08-27 09:09:00,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 140 transitions, 933 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:09:00,346 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 293 flow [2023-08-27 09:09:00,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=293, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-27 09:09:00,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2023-08-27 09:09:00,347 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 293 flow [2023-08-27 09:09:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.58333333333334) internal successors, (1663), 12 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:00,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:09:00,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:09:00,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 09:09:00,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 09:09:00,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:09:00,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:09:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1243298773, now seen corresponding path program 1 times [2023-08-27 09:09:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:09:00,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228318188] [2023-08-27 09:09:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:09:00,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:09:00,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:09:00,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006793514] [2023-08-27 09:09:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:09:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:09:00,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:09:00,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:09:00,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 09:09:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:09:00,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 09:09:00,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:09:01,159 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 09:09:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:09:01,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:09:01,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 40 treesize of output 36 [2023-08-27 09:09:01,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:09:01,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-27 09:09:01,607 INFO L322 Elim1Store]: treesize reduction 50, result has 51.0 percent of original size [2023-08-27 09:09:01,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 127 [2023-08-27 09:09:01,692 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:09:01,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 85 [2023-08-27 09:09:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:09:10,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:09:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228318188] [2023-08-27 09:09:10,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:09:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006793514] [2023-08-27 09:09:10,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006793514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:09:10,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-27 09:09:10,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2023-08-27 09:09:10,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449772393] [2023-08-27 09:09:10,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-27 09:09:10,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 09:09:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:09:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 09:09:10,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-08-27 09:09:10,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 318 [2023-08-27 09:09:10,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 293 flow. Second operand has 27 states, 27 states have (on average 94.37037037037037) internal successors, (2548), 27 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:10,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:09:10,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 318 [2023-08-27 09:09:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:10:54,939 INFO L124 PetriNetUnfolderBase]: 2974/5677 cut-off events. [2023-08-27 09:10:54,939 INFO L125 PetriNetUnfolderBase]: For 8594/8594 co-relation queries the response was YES. [2023-08-27 09:10:54,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17846 conditions, 5677 events. 2974/5677 cut-off events. For 8594/8594 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 30875 event pairs, 225 based on Foata normal form. 145/5822 useless extension candidates. Maximal degree in co-relation 17820. Up to 1010 conditions per place. [2023-08-27 09:10:54,964 INFO L140 encePairwiseOnDemand]: 300/318 looper letters, 336 selfloop transitions, 171 changer transitions 60/570 dead transitions. [2023-08-27 09:10:54,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 570 transitions, 3853 flow [2023-08-27 09:10:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-27 09:10:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-27 09:10:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7115 transitions. [2023-08-27 09:10:54,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31075296995108315 [2023-08-27 09:10:54,980 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7115 transitions. [2023-08-27 09:10:54,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7115 transitions. [2023-08-27 09:10:54,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:10:54,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7115 transitions. [2023-08-27 09:10:54,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 98.81944444444444) internal successors, (7115), 72 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:55,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 318.0) internal successors, (23214), 73 states have internal predecessors, (23214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:55,024 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 318.0) internal successors, (23214), 73 states have internal predecessors, (23214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:55,024 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 293 flow. Second operand 72 states and 7115 transitions. [2023-08-27 09:10:55,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 570 transitions, 3853 flow [2023-08-27 09:10:55,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 570 transitions, 3781 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-27 09:10:55,043 INFO L231 Difference]: Finished difference. Result has 164 places, 224 transitions, 1822 flow [2023-08-27 09:10:55,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1822, PETRI_PLACES=164, PETRI_TRANSITIONS=224} [2023-08-27 09:10:55,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2023-08-27 09:10:55,043 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 224 transitions, 1822 flow [2023-08-27 09:10:55,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.37037037037037) internal successors, (2548), 27 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:55,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:10:55,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:10:55,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 09:10:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 09:10:55,252 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:10:55,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:10:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash -627369711, now seen corresponding path program 2 times [2023-08-27 09:10:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:10:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154129959] [2023-08-27 09:10:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:10:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:10:55,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:10:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528025213] [2023-08-27 09:10:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:10:55,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:10:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:10:55,293 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:10:55,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 09:10:55,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:10:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:10:55,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 09:10:55,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:10:56,054 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 09:10:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:10:56,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:10:57,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 40 treesize of output 36 [2023-08-27 09:10:57,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:10:57,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-27 09:10:58,286 INFO L217 Elim1Store]: Index analysis took 123 ms [2023-08-27 09:10:58,602 INFO L322 Elim1Store]: treesize reduction 50, result has 51.0 percent of original size [2023-08-27 09:10:58,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 126 [2023-08-27 09:11:00,139 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:11:00,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 85 [2023-08-27 09:11:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:11:34,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:11:34,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154129959] [2023-08-27 09:11:34,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:11:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528025213] [2023-08-27 09:11:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528025213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:11:34,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-27 09:11:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2023-08-27 09:11:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580138209] [2023-08-27 09:11:34,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-27 09:11:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 09:11:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:11:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 09:11:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-08-27 09:11:34,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 318 [2023-08-27 09:11:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 224 transitions, 1822 flow. Second operand has 29 states, 29 states have (on average 94.13793103448276) internal successors, (2730), 29 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:11:34,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:11:34,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 318 [2023-08-27 09:11:34,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:12:18,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-08-27 09:12:27,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-08-27 09:12:48,332 WARN L234 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:13:06,414 WARN L234 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 85 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:13:41,864 WARN L234 SmtUtils]: Spent 19.12s on a formula simplification. DAG size of input: 85 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:13:57,216 WARN L234 SmtUtils]: Spent 13.35s on a formula simplification. DAG size of input: 86 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:14:15,348 WARN L234 SmtUtils]: Spent 12.47s on a formula simplification. DAG size of input: 81 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:14:38,577 INFO L124 PetriNetUnfolderBase]: 4610/8897 cut-off events. [2023-08-27 09:14:38,577 INFO L125 PetriNetUnfolderBase]: For 52528/52540 co-relation queries the response was YES. [2023-08-27 09:14:38,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37846 conditions, 8897 events. 4610/8897 cut-off events. For 52528/52540 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 53724 event pairs, 483 based on Foata normal form. 102/8987 useless extension candidates. Maximal degree in co-relation 37796. Up to 1803 conditions per place. [2023-08-27 09:14:38,630 INFO L140 encePairwiseOnDemand]: 299/318 looper letters, 443 selfloop transitions, 253 changer transitions 63/776 dead transitions. [2023-08-27 09:14:38,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 776 transitions, 7125 flow [2023-08-27 09:14:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-27 09:14:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-27 09:14:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 7275 transitions. [2023-08-27 09:14:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3091534931157573 [2023-08-27 09:14:38,640 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 7275 transitions. [2023-08-27 09:14:38,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 7275 transitions. [2023-08-27 09:14:38,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:14:38,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 7275 transitions. [2023-08-27 09:14:38,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 98.3108108108108) internal successors, (7275), 74 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:14:38,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 318.0) internal successors, (23850), 75 states have internal predecessors, (23850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:14:38,673 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 318.0) internal successors, (23850), 75 states have internal predecessors, (23850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:14:38,673 INFO L175 Difference]: Start difference. First operand has 164 places, 224 transitions, 1822 flow. Second operand 74 states and 7275 transitions. [2023-08-27 09:14:38,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 776 transitions, 7125 flow [2023-08-27 09:14:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 776 transitions, 6912 flow, removed 103 selfloop flow, removed 2 redundant places. [2023-08-27 09:14:39,141 INFO L231 Difference]: Finished difference. Result has 273 places, 399 transitions, 4171 flow [2023-08-27 09:14:39,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=4171, PETRI_PLACES=273, PETRI_TRANSITIONS=399} [2023-08-27 09:14:39,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2023-08-27 09:14:39,141 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 399 transitions, 4171 flow [2023-08-27 09:14:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.13793103448276) internal successors, (2730), 29 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:14:39,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:14:39,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:14:39,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 09:14:39,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 09:14:39,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:14:39,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:14:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash -841286149, now seen corresponding path program 1 times [2023-08-27 09:14:39,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:14:39,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816389308] [2023-08-27 09:14:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:14:39,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:14:39,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:14:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877230262] [2023-08-27 09:14:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:14:39,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:14:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:14:39,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:14:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 09:14:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:14:39,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 09:14:39,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:14:40,120 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 53 treesize of output 48 [2023-08-27 09:14:40,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 90 [2023-08-27 09:14:40,134 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:14:40,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 3 [2023-08-27 09:14:40,365 INFO L322 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-08-27 09:14:40,365 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 23 treesize of output 10 [2023-08-27 09:14:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:14:40,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:14:40,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 40 treesize of output 36 [2023-08-27 09:14:40,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:14:40,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-27 09:14:40,604 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:14:40,606 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2023-08-27 09:14:40,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:14:40,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 131 [2023-08-27 09:14:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:14:53,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:14:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816389308] [2023-08-27 09:14:53,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:14:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877230262] [2023-08-27 09:14:53,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877230262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:14:53,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-27 09:14:53,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2023-08-27 09:14:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583726399] [2023-08-27 09:14:53,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-27 09:14:53,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 09:14:53,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:14:53,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 09:14:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-08-27 09:14:53,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 318 [2023-08-27 09:14:53,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 399 transitions, 4171 flow. Second operand has 30 states, 30 states have (on average 100.33333333333333) internal successors, (3010), 30 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:14:53,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:14:53,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 318 [2023-08-27 09:14:53,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:15:07,507 WARN L234 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 91 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:15:18,315 WARN L234 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 88 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:15:21,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:15:25,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:15:26,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:15:45,652 WARN L234 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 89 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:15:59,971 WARN L234 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 105 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:16:02,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:06,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:16,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:23,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:25,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:26,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:36,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:16:48,749 WARN L234 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 78 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:17:05,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:17:11,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:17:19,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:17:20,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-27 09:17:28,114 INFO L124 PetriNetUnfolderBase]: 8696/17121 cut-off events. [2023-08-27 09:17:28,114 INFO L125 PetriNetUnfolderBase]: For 294964/294974 co-relation queries the response was YES. [2023-08-27 09:17:28,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96046 conditions, 17121 events. 8696/17121 cut-off events. For 294964/294974 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 122190 event pairs, 899 based on Foata normal form. 191/17302 useless extension candidates. Maximal degree in co-relation 95957. Up to 3143 conditions per place. [2023-08-27 09:17:28,371 INFO L140 encePairwiseOnDemand]: 303/318 looper letters, 538 selfloop transitions, 568 changer transitions 87/1212 dead transitions. [2023-08-27 09:17:28,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1212 transitions, 14273 flow [2023-08-27 09:17:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-27 09:17:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-27 09:17:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 8066 transitions. [2023-08-27 09:17:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32941272563914076 [2023-08-27 09:17:28,391 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 8066 transitions. [2023-08-27 09:17:28,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 8066 transitions. [2023-08-27 09:17:28,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:17:28,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 8066 transitions. [2023-08-27 09:17:28,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 104.75324675324676) internal successors, (8066), 77 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:17:28,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 318.0) internal successors, (24804), 78 states have internal predecessors, (24804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:17:28,440 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 318.0) internal successors, (24804), 78 states have internal predecessors, (24804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:17:28,440 INFO L175 Difference]: Start difference. First operand has 273 places, 399 transitions, 4171 flow. Second operand 77 states and 8066 transitions. [2023-08-27 09:17:28,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1212 transitions, 14273 flow [2023-08-27 09:17:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1212 transitions, 13933 flow, removed 137 selfloop flow, removed 15 redundant places. [2023-08-27 09:17:29,946 INFO L231 Difference]: Finished difference. Result has 373 places, 756 transitions, 10141 flow [2023-08-27 09:17:29,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=10141, PETRI_PLACES=373, PETRI_TRANSITIONS=756} [2023-08-27 09:17:29,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2023-08-27 09:17:29,947 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 756 transitions, 10141 flow [2023-08-27 09:17:29,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.33333333333333) internal successors, (3010), 30 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:17:29,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:17:29,948 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:17:29,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 09:17:30,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 09:17:30,154 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:17:30,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:17:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash -318929575, now seen corresponding path program 2 times [2023-08-27 09:17:30,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:17:30,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325902200] [2023-08-27 09:17:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:17:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:17:30,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:17:30,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466920063] [2023-08-27 09:17:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:17:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:17:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:17:30,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:17:30,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 09:17:30,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:17:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:17:30,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 09:17:30,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:17:31,189 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 09:17:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:17:31,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:17:31,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 40 treesize of output 36 [2023-08-27 09:17:31,613 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:17:31,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-27 09:17:31,646 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:17:31,648 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2023-08-27 09:17:31,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:17:31,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 131 [2023-08-27 09:17:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:17:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:17:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325902200] [2023-08-27 09:17:38,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:17:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466920063] [2023-08-27 09:17:38,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466920063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:17:38,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-27 09:17:38,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2023-08-27 09:17:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014683855] [2023-08-27 09:17:38,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-27 09:17:38,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 09:17:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:17:38,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 09:17:38,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-08-27 09:17:38,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 318 [2023-08-27 09:17:38,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 756 transitions, 10141 flow. Second operand has 31 states, 31 states have (on average 100.25806451612904) internal successors, (3108), 31 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:17:38,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:17:38,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 318 [2023-08-27 09:17:38,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:17:49,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-08-27 09:17:58,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-08-27 09:18:32,489 INFO L124 PetriNetUnfolderBase]: 11395/22483 cut-off events. [2023-08-27 09:18:32,490 INFO L125 PetriNetUnfolderBase]: For 981475/981597 co-relation queries the response was YES. [2023-08-27 09:18:32,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161596 conditions, 22483 events. 11395/22483 cut-off events. For 981475/981597 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 166836 event pairs, 2125 based on Foata normal form. 154/22583 useless extension candidates. Maximal degree in co-relation 161467. Up to 8958 conditions per place. [2023-08-27 09:18:32,773 INFO L140 encePairwiseOnDemand]: 302/318 looper letters, 894 selfloop transitions, 563 changer transitions 127/1603 dead transitions. [2023-08-27 09:18:32,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1603 transitions, 23782 flow [2023-08-27 09:18:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-27 09:18:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-27 09:18:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 8991 transitions. [2023-08-27 09:18:32,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32876261518209743 [2023-08-27 09:18:32,784 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 8991 transitions. [2023-08-27 09:18:32,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 8991 transitions. [2023-08-27 09:18:32,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:18:32,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 8991 transitions. [2023-08-27 09:18:32,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 104.54651162790698) internal successors, (8991), 86 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:18:32,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 318.0) internal successors, (27666), 87 states have internal predecessors, (27666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:18:32,817 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 318.0) internal successors, (27666), 87 states have internal predecessors, (27666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:18:32,817 INFO L175 Difference]: Start difference. First operand has 373 places, 756 transitions, 10141 flow. Second operand 86 states and 8991 transitions. [2023-08-27 09:18:32,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1603 transitions, 23782 flow [2023-08-27 09:18:37,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1603 transitions, 23097 flow, removed 297 selfloop flow, removed 21 redundant places. [2023-08-27 09:18:37,874 INFO L231 Difference]: Finished difference. Result has 474 places, 1035 transitions, 15925 flow [2023-08-27 09:18:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9778, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=15925, PETRI_PLACES=474, PETRI_TRANSITIONS=1035} [2023-08-27 09:18:37,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2023-08-27 09:18:37,875 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1035 transitions, 15925 flow [2023-08-27 09:18:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.25806451612904) internal successors, (3108), 31 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:18:37,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:18:37,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:18:37,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 09:18:38,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:18:38,076 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2023-08-27 09:18:38,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:18:38,077 INFO L85 PathProgramCache]: Analyzing trace with hash 668753503, now seen corresponding path program 3 times [2023-08-27 09:18:38,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:18:38,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444688965] [2023-08-27 09:18:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:18:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:18:38,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:18:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833580528] [2023-08-27 09:18:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:18:38,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:18:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:18:38,093 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:18:38,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 09:18:39,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:18:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:18:39,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-27 09:18:39,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:18:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:18:39,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 09:18:39,973 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 09:18:39,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 09:18:40,005 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 13 treesize of output 15 [2023-08-27 09:18:40,076 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 18 treesize of output 13 [2023-08-27 09:18:40,325 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 21 treesize of output 16 [2023-08-27 09:18:40,729 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 31 treesize of output 24 [2023-08-27 09:18:40,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2023-08-27 09:18:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:18:40,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:19:21,693 WARN L234 SmtUtils]: Spent 23.87s on a formula simplification. DAG size of input: 183 DAG size of output: 153 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:20:22,854 WARN L234 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:20:39,850 WARN L234 SmtUtils]: Spent 9.05s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:21:02,888 WARN L234 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:22:02,432 WARN L234 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-27 09:22:51,998 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:22:51,999 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:22:52,133 WARN L266 SmtUtils]: Removed 18 from assertion stack [2023-08-27 09:22:52,135 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-27 09:22:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 09:22:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:22:52,335 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. [2023-08-27 09:22:52,336 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 16 remaining) [2023-08-27 09:22:52,336 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONASSERT (10 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1ASSERT_VIOLATIONASSERT (9 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONASSERT (6 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONASSERT (3 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1ASSERT_VIOLATIONASSERT (2 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 16 remaining) [2023-08-27 09:22:52,337 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 16 remaining) [2023-08-27 09:22:52,338 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:22:52,341 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:22:52,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:22:52,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:22:52 BasicIcfg [2023-08-27 09:22:52,343 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:22:52,344 INFO L158 Benchmark]: Toolchain (without parser) took 851517.97ms. Allocated memory was 339.7MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 315.1MB in the beginning and 648.1MB in the end (delta: -333.0MB). Peak memory consumption was 671.3MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,344 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory was 317.7MB in the beginning and 317.5MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:22:52,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.89ms. Allocated memory is still 339.7MB. Free memory was 315.1MB in the beginning and 294.9MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.96ms. Allocated memory is still 339.7MB. Free memory was 294.9MB in the beginning and 292.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,348 INFO L158 Benchmark]: Boogie Preprocessor took 44.09ms. Allocated memory is still 339.7MB. Free memory was 292.8MB in the beginning and 290.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,349 INFO L158 Benchmark]: RCFGBuilder took 493.57ms. Allocated memory is still 339.7MB. Free memory was 290.8MB in the beginning and 271.1MB in the end (delta: 19.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,349 INFO L158 Benchmark]: TraceAbstraction took 850420.41ms. Allocated memory was 339.7MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 271.1MB in the beginning and 648.1MB in the end (delta: -377.0MB). Peak memory consumption was 627.3MB. Max. memory is 16.0GB. [2023-08-27 09:22:52,353 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory was 317.7MB in the beginning and 317.5MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 473.89ms. Allocated memory is still 339.7MB. Free memory was 315.1MB in the beginning and 294.9MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 72.96ms. Allocated memory is still 339.7MB. Free memory was 294.9MB in the beginning and 292.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.09ms. Allocated memory is still 339.7MB. Free memory was 292.8MB in the beginning and 290.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 493.57ms. Allocated memory is still 339.7MB. Free memory was 290.8MB in the beginning and 271.1MB in the end (delta: 19.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 850420.41ms. Allocated memory was 339.7MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 271.1MB in the beginning and 648.1MB in the end (delta: -377.0MB). Peak memory consumption was 627.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 208]: Unsoundness Warning unspecified type, defaulting to int C: short [208] - GenericResultAtLocation [Line: 209]: Unsoundness Warning unspecified type, defaulting to int C: short [209] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 150 PlacesBefore, 42 PlacesAfterwards, 157 TransitionsBefore, 42 TransitionsAfterwards, 6602 CoEnabledTransitionPairs, 7 FixpointIterations, 42 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 7 ChoiceCompositions, 150 TotalNumberOfCompositions, 13935 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8882, independent: 8560, independent conditional: 0, independent unconditional: 8560, dependent: 322, dependent conditional: 0, dependent unconditional: 322, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3915, independent: 3859, independent conditional: 0, independent unconditional: 3859, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8882, independent: 4701, independent conditional: 0, independent unconditional: 4701, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 3915, unknown conditional: 0, unknown unconditional: 3915] , Statistics on independence cache: Total cache size (in pairs): 285, Positive cache size: 266, Positive conditional cache size: 0, Positive unconditional cache size: 266, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 764]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 763]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 725]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 725]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 743]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - TimeoutResultAtElement [Line: 743]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 56 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 231 for 14308ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 246 locations, 16 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: 850.2s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 512.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 3008 SdHoareTripleChecker+Valid, 156.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3008 mSDsluCounter, 103 SdHoareTripleChecker+Invalid, 154.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 93 mSDsCounter, 233 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12751 IncrementalHoareTripleChecker+Invalid, 12991 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 233 mSolverCounterUnsat, 10 mSDtfsCounter, 12751 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 785 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9308 ImplicationChecksByTransitivity, 361.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15925occurred in iteration=19, InterpolantAutomatonStates: 369, 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: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 72.1s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 577 ConstructedInterpolants, 43 QuantifiedInterpolants, 15197 SizeOfPredicates, 94 NumberOfNonLiveVariables, 3508 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 26 InterpolantComputations, 14 PerfectInterpolantSequences, 24/230 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown