/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 -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:47:38,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:47:38,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 08:47:38,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:47:38,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:47:38,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:47:38,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:47:38,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:47:38,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:47:38,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:47:38,960 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:47:38,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:47:38,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:47:38,961 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:47:38,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:47:38,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:47:38,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:47:38,963 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:47:38,963 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:47:38,963 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:47:38,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:47:38,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:47:38,969 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:47:38,970 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:47:38,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:47:38,973 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:47:38,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:47:38,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:47:38,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:47:38,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:47:38,976 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:47:38,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:47:38,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:47:38,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:47:38,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:47:38,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:47:39,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:47:39,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:47:39,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:47:39,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:47:39,348 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:47:39,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-24 08:47:40,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:47:40,758 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:47:40,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-24 08:47:40,767 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9479d9a/7a2eebdc6bee4089a1396a9e21062a56/FLAG50c6a5920 [2023-08-24 08:47:40,782 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9479d9a/7a2eebdc6bee4089a1396a9e21062a56 [2023-08-24 08:47:40,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:47:40,789 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:47:40,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:47:40,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:47:40,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:47:40,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:47:40" (1/1) ... [2023-08-24 08:47:40,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f2b1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:40, skipping insertion in model container [2023-08-24 08:47:40,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:47:40" (1/1) ... [2023-08-24 08:47:40,824 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:47:41,009 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-08-24 08:47:41,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:47:41,028 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:47:41,063 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-08-24 08:47:41,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:47:41,072 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:47:41,072 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:47:41,078 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:47:41,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41 WrapperNode [2023-08-24 08:47:41,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:47:41,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:47:41,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:47:41,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:47:41,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,140 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 202 [2023-08-24 08:47:41,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:47:41,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:47:41,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:47:41,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:47:41,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:47:41,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:47:41,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:47:41,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:47:41,177 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (1/1) ... [2023-08-24 08:47:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:47:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:41,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 08:47:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 08:47:41,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:47:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:47:41,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:47:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:47:41,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:47:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:47:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:47:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:47:41,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:47:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:47:41,244 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 08:47:41,328 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:47:41,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:47:41,636 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:47:41,808 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:47:41,808 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 08:47:41,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:47:41 BoogieIcfgContainer [2023-08-24 08:47:41,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:47:41,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:47:41,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:47:41,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:47:41,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:47:40" (1/3) ... [2023-08-24 08:47:41,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58044179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:47:41, skipping insertion in model container [2023-08-24 08:47:41,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:47:41" (2/3) ... [2023-08-24 08:47:41,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58044179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:47:41, skipping insertion in model container [2023-08-24 08:47:41,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:47:41" (3/3) ... [2023-08-24 08:47:41,818 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-08-24 08:47:41,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:47:41,835 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:47:41,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:47:41,904 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:47:41,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 159 transitions, 334 flow [2023-08-24 08:47:42,012 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-08-24 08:47:42,012 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:47:42,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-24 08:47:42,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 159 transitions, 334 flow [2023-08-24 08:47:42,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 149 transitions, 310 flow [2023-08-24 08:47:42,028 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:47:42,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 149 transitions, 310 flow [2023-08-24 08:47:42,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 149 transitions, 310 flow [2023-08-24 08:47:42,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 149 transitions, 310 flow [2023-08-24 08:47:42,108 INFO L124 PetriNetUnfolderBase]: 13/149 cut-off events. [2023-08-24 08:47:42,108 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:47:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 13/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-24 08:47:42,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 08:47:46,806 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-08-24 08:47:46,806 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-24 08:47:46,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:47:46,822 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;@7fa2d77c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:47:46,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:47:46,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:47:46,827 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2023-08-24 08:47:46,827 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:47:46,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:46,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:46,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:46,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1609564256, now seen corresponding path program 1 times [2023-08-24 08:47:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861263413] [2023-08-24 08:47:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861263413] [2023-08-24 08:47:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861263413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:47,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:47:47,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872188569] [2023-08-24 08:47:47,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:47:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:47:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:47:47,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 308 [2023-08-24 08:47:47,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:47,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 308 [2023-08-24 08:47:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:47,282 INFO L124 PetriNetUnfolderBase]: 67/118 cut-off events. [2023-08-24 08:47:47,282 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 08:47:47,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-24 08:47:47,286 INFO L140 encePairwiseOnDemand]: 304/308 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-08-24 08:47:47,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-08-24 08:47:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:47:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:47:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-24 08:47:47,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-24 08:47:47,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-24 08:47:47,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-24 08:47:47,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:47,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-24 08:47:47,317 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) [2023-08-24 08:47:47,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,324 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 451 transitions. [2023-08-24 08:47:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-08-24 08:47:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:47:47,328 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-08-24 08:47:47,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-08-24 08:47:47,333 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-24 08:47:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-08-24 08:47:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:47,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:47,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:47:47,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:47,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1078240598, now seen corresponding path program 1 times [2023-08-24 08:47:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:47,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178116578] [2023-08-24 08:47:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:47,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178116578] [2023-08-24 08:47:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178116578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:47,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654854068] [2023-08-24 08:47:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:47,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:47,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:47,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:47,630 INFO L124 PetriNetUnfolderBase]: 95/175 cut-off events. [2023-08-24 08:47:47,631 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-24 08:47:47,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 175 events. 95/175 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 536 event pairs, 26 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 136. Up to 88 conditions per place. [2023-08-24 08:47:47,633 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 34 selfloop transitions, 4 changer transitions 7/45 dead transitions. [2023-08-24 08:47:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 45 transitions, 218 flow [2023-08-24 08:47:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-24 08:47:47,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461038961038961 [2023-08-24 08:47:47,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-24 08:47:47,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-24 08:47:47,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:47,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-24 08:47:47,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,643 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,643 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 687 transitions. [2023-08-24 08:47:47,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 45 transitions, 218 flow [2023-08-24 08:47:47,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:47:47,645 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 87 flow [2023-08-24 08:47:47,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 08:47:47,646 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-08-24 08:47:47,646 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 87 flow [2023-08-24 08:47:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:47,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:47:47,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:47,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2138165292, now seen corresponding path program 2 times [2023-08-24 08:47:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:47,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519902009] [2023-08-24 08:47:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519902009] [2023-08-24 08:47:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519902009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261268649] [2023-08-24 08:47:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:47:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:47,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:47:47,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 08:47:47,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:47:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:47,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:47:47,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:47,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261268649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:47,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 08:47:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851075341] [2023-08-24 08:47:47,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:47:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:47:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:47:47,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:47,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 87 flow. Second operand has 8 states, 8 states have (on average 131.75) internal successors, (1054), 8 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:47,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:47,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:48,101 INFO L124 PetriNetUnfolderBase]: 110/204 cut-off events. [2023-08-24 08:47:48,102 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-24 08:47:48,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 204 events. 110/204 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 614 event pairs, 25 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 277. Up to 82 conditions per place. [2023-08-24 08:47:48,104 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 45 selfloop transitions, 10 changer transitions 1/56 dead transitions. [2023-08-24 08:47:48,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 338 flow [2023-08-24 08:47:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:47:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:47:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2023-08-24 08:47:48,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 08:47:48,107 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2023-08-24 08:47:48,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2023-08-24 08:47:48,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:48,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2023-08-24 08:47:48,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,114 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 87 flow. Second operand 7 states and 952 transitions. [2023-08-24 08:47:48,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 338 flow [2023-08-24 08:47:48,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 56 transitions, 308 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:48,118 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 152 flow [2023-08-24 08:47:48,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-24 08:47:48,118 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-08-24 08:47:48,118 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 152 flow [2023-08-24 08:47:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.75) internal successors, (1054), 8 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:48,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:48,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:48,325 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 [2023-08-24 08:47:48,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:48,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1147044196, now seen corresponding path program 1 times [2023-08-24 08:47:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:48,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312050131] [2023-08-24 08:47:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:48,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:48,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:48,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312050131] [2023-08-24 08:47:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312050131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:48,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936685844] [2023-08-24 08:47:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:48,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:48,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:48,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:47:48,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 08:47:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:48,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:47:48,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:47:48,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 08:47:48,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936685844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:48,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 08:47:48,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-24 08:47:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958835778] [2023-08-24 08:47:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:47:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:47:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 08:47:48,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 308 [2023-08-24 08:47:48,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:48,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 308 [2023-08-24 08:47:48,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:48,650 INFO L124 PetriNetUnfolderBase]: 98/205 cut-off events. [2023-08-24 08:47:48,650 INFO L125 PetriNetUnfolderBase]: For 469/483 co-relation queries the response was YES. [2023-08-24 08:47:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 205 events. 98/205 cut-off events. For 469/483 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 770 event pairs, 60 based on Foata normal form. 24/216 useless extension candidates. Maximal degree in co-relation 400. Up to 161 conditions per place. [2023-08-24 08:47:48,653 INFO L140 encePairwiseOnDemand]: 301/308 looper letters, 25 selfloop transitions, 2 changer transitions 14/45 dead transitions. [2023-08-24 08:47:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 279 flow [2023-08-24 08:47:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-08-24 08:47:48,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922077922077922 [2023-08-24 08:47:48,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-08-24 08:47:48,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-08-24 08:47:48,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:48,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-08-24 08:47:48,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,661 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,662 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 152 flow. Second operand 5 states and 604 transitions. [2023-08-24 08:47:48,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 279 flow [2023-08-24 08:47:48,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 08:47:48,668 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 164 flow [2023-08-24 08:47:48,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-24 08:47:48,672 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-08-24 08:47:48,673 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 164 flow [2023-08-24 08:47:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:48,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:48,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:48,881 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,SelfDestructingSolverStorable3 [2023-08-24 08:47:48,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:48,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789985, now seen corresponding path program 1 times [2023-08-24 08:47:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:48,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855814253] [2023-08-24 08:47:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:48,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:48,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855814253] [2023-08-24 08:47:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855814253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:48,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842053440] [2023-08-24 08:47:48,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:48,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:48,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:48,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:48,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:48,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:48,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:49,045 INFO L124 PetriNetUnfolderBase]: 118/219 cut-off events. [2023-08-24 08:47:49,045 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-08-24 08:47:49,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 219 events. 118/219 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 27 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 757. Up to 98 conditions per place. [2023-08-24 08:47:49,047 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-08-24 08:47:49,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 377 flow [2023-08-24 08:47:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-24 08:47:49,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474025974025974 [2023-08-24 08:47:49,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-24 08:47:49,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-24 08:47:49,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:49,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-24 08:47:49,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,054 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 164 flow. Second operand 5 states and 689 transitions. [2023-08-24 08:47:49,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 377 flow [2023-08-24 08:47:49,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 363 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 08:47:49,057 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 198 flow [2023-08-24 08:47:49,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-24 08:47:49,058 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-08-24 08:47:49,058 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 198 flow [2023-08-24 08:47:49,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:49,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 08:47:49,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:49,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -462385135, now seen corresponding path program 1 times [2023-08-24 08:47:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:49,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106186839] [2023-08-24 08:47:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:49,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106186839] [2023-08-24 08:47:49,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106186839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:49,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:49,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619204325] [2023-08-24 08:47:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:49,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:49,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:49,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:49,215 INFO L124 PetriNetUnfolderBase]: 128/235 cut-off events. [2023-08-24 08:47:49,216 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-08-24 08:47:49,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 235 events. 128/235 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 744 event pairs, 43 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 883. Up to 191 conditions per place. [2023-08-24 08:47:49,217 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 35 selfloop transitions, 10 changer transitions 5/50 dead transitions. [2023-08-24 08:47:49,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 390 flow [2023-08-24 08:47:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-24 08:47:49,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 08:47:49,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-24 08:47:49,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-24 08:47:49,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:49,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-24 08:47:49,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,224 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 198 flow. Second operand 5 states and 682 transitions. [2023-08-24 08:47:49,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 390 flow [2023-08-24 08:47:49,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 368 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:49,228 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 248 flow [2023-08-24 08:47:49,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-24 08:47:49,228 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-24 08:47:49,229 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 248 flow [2023-08-24 08:47:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:49,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 08:47:49,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:49,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1862998627, now seen corresponding path program 2 times [2023-08-24 08:47:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294271365] [2023-08-24 08:47:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:49,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294271365] [2023-08-24 08:47:49,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294271365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:49,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:49,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:49,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708031412] [2023-08-24 08:47:49,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:49,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:49,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:49,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:49,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:49,369 INFO L124 PetriNetUnfolderBase]: 124/229 cut-off events. [2023-08-24 08:47:49,369 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2023-08-24 08:47:49,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 229 events. 124/229 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 731 event pairs, 41 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 953. Up to 189 conditions per place. [2023-08-24 08:47:49,371 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 33 selfloop transitions, 14 changer transitions 3/50 dead transitions. [2023-08-24 08:47:49,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 432 flow [2023-08-24 08:47:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 680 transitions. [2023-08-24 08:47:49,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 08:47:49,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 680 transitions. [2023-08-24 08:47:49,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 680 transitions. [2023-08-24 08:47:49,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:49,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 680 transitions. [2023-08-24 08:47:49,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,378 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 248 flow. Second operand 5 states and 680 transitions. [2023-08-24 08:47:49,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 432 flow [2023-08-24 08:47:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 404 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:49,382 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 312 flow [2023-08-24 08:47:49,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-08-24 08:47:49,382 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 27 predicate places. [2023-08-24 08:47:49,383 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 312 flow [2023-08-24 08:47:49,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:49,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 08:47:49,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:49,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash 54138243, now seen corresponding path program 3 times [2023-08-24 08:47:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971374538] [2023-08-24 08:47:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971374538] [2023-08-24 08:47:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971374538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:49,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:49,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:49,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353733306] [2023-08-24 08:47:49,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:49,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:49,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:49,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:49,564 INFO L124 PetriNetUnfolderBase]: 122/227 cut-off events. [2023-08-24 08:47:49,564 INFO L125 PetriNetUnfolderBase]: For 765/765 co-relation queries the response was YES. [2023-08-24 08:47:49,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 227 events. 122/227 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 715 event pairs, 36 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 993. Up to 149 conditions per place. [2023-08-24 08:47:49,566 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 44 selfloop transitions, 10 changer transitions 4/58 dead transitions. [2023-08-24 08:47:49,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 525 flow [2023-08-24 08:47:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 683 transitions. [2023-08-24 08:47:49,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435064935064935 [2023-08-24 08:47:49,569 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 683 transitions. [2023-08-24 08:47:49,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 683 transitions. [2023-08-24 08:47:49,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:49,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 683 transitions. [2023-08-24 08:47:49,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,574 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 312 flow. Second operand 5 states and 683 transitions. [2023-08-24 08:47:49,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 525 flow [2023-08-24 08:47:49,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 481 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:49,578 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 304 flow [2023-08-24 08:47:49,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-24 08:47:49,581 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-08-24 08:47:49,581 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 304 flow [2023-08-24 08:47:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:49,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 08:47:49,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:49,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash -30557945, now seen corresponding path program 2 times [2023-08-24 08:47:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868456722] [2023-08-24 08:47:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:49,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:49,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868456722] [2023-08-24 08:47:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868456722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:49,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803978939] [2023-08-24 08:47:49,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:49,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:49,744 INFO L124 PetriNetUnfolderBase]: 125/232 cut-off events. [2023-08-24 08:47:49,744 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2023-08-24 08:47:49,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 232 events. 125/232 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 738 event pairs, 49 based on Foata normal form. 4/234 useless extension candidates. Maximal degree in co-relation 1021. Up to 191 conditions per place. [2023-08-24 08:47:49,746 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 36 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2023-08-24 08:47:49,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 452 flow [2023-08-24 08:47:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-24 08:47:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422077922077922 [2023-08-24 08:47:49,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-24 08:47:49,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-24 08:47:49,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:49,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-24 08:47:49,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,753 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 304 flow. Second operand 5 states and 681 transitions. [2023-08-24 08:47:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 452 flow [2023-08-24 08:47:49,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 430 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 08:47:49,757 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 323 flow [2023-08-24 08:47:49,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-24 08:47:49,758 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-08-24 08:47:49,758 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 323 flow [2023-08-24 08:47:49,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:49,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 08:47:49,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:49,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 177958731, now seen corresponding path program 4 times [2023-08-24 08:47:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:49,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546830224] [2023-08-24 08:47:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:49,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:49,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546830224] [2023-08-24 08:47:49,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546830224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:49,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927009705] [2023-08-24 08:47:49,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:47:49,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:49,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:47:49,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 08:47:49,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:47:49,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:49,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:47:49,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927009705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:49,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 08:47:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50328933] [2023-08-24 08:47:49,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 08:47:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 08:47:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:47:49,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:49,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 323 flow. Second operand has 10 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:49,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:50,127 INFO L124 PetriNetUnfolderBase]: 141/260 cut-off events. [2023-08-24 08:47:50,128 INFO L125 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2023-08-24 08:47:50,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 260 events. 141/260 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 872 event pairs, 29 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 1143. Up to 143 conditions per place. [2023-08-24 08:47:50,130 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 50 selfloop transitions, 26 changer transitions 0/76 dead transitions. [2023-08-24 08:47:50,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 645 flow [2023-08-24 08:47:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:47:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:47:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1349 transitions. [2023-08-24 08:47:50,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437987012987013 [2023-08-24 08:47:50,134 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1349 transitions. [2023-08-24 08:47:50,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1349 transitions. [2023-08-24 08:47:50,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:50,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1349 transitions. [2023-08-24 08:47:50,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 134.9) internal successors, (1349), 10 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,142 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,142 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 323 flow. Second operand 10 states and 1349 transitions. [2023-08-24 08:47:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 645 flow [2023-08-24 08:47:50,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 611 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 08:47:50,147 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 453 flow [2023-08-24 08:47:50,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=453, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-08-24 08:47:50,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-08-24 08:47:50,148 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 453 flow [2023-08-24 08:47:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:50,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:50,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:50,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:50,354 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:50,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:50,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1643180945, now seen corresponding path program 3 times [2023-08-24 08:47:50,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:50,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386156243] [2023-08-24 08:47:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:50,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:50,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:50,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386156243] [2023-08-24 08:47:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386156243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:50,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:50,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942177375] [2023-08-24 08:47:50,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:50,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:50,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:50,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:50,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:50,519 INFO L124 PetriNetUnfolderBase]: 137/256 cut-off events. [2023-08-24 08:47:50,519 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2023-08-24 08:47:50,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 256 events. 137/256 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 875 event pairs, 38 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 1235. Up to 210 conditions per place. [2023-08-24 08:47:50,521 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 43 selfloop transitions, 14 changer transitions 5/62 dead transitions. [2023-08-24 08:47:50,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 620 flow [2023-08-24 08:47:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-24 08:47:50,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422077922077922 [2023-08-24 08:47:50,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-24 08:47:50,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-24 08:47:50,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:50,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-24 08:47:50,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,529 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 453 flow. Second operand 5 states and 681 transitions. [2023-08-24 08:47:50,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 620 flow [2023-08-24 08:47:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 585 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:50,534 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 442 flow [2023-08-24 08:47:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-24 08:47:50,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 43 predicate places. [2023-08-24 08:47:50,534 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 442 flow [2023-08-24 08:47:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 08:47:50,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:50,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1177190389, now seen corresponding path program 5 times [2023-08-24 08:47:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628571180] [2023-08-24 08:47:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:50,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628571180] [2023-08-24 08:47:50,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628571180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:50,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:50,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:50,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470286700] [2023-08-24 08:47:50,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:50,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:50,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:50,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:50,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:50,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:50,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:50,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:50,710 INFO L124 PetriNetUnfolderBase]: 130/245 cut-off events. [2023-08-24 08:47:50,710 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2023-08-24 08:47:50,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 245 events. 130/245 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 807 event pairs, 38 based on Foata normal form. 2/245 useless extension candidates. Maximal degree in co-relation 1183. Up to 192 conditions per place. [2023-08-24 08:47:50,712 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 39 selfloop transitions, 17 changer transitions 3/59 dead transitions. [2023-08-24 08:47:50,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 602 flow [2023-08-24 08:47:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-08-24 08:47:50,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2023-08-24 08:47:50,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-08-24 08:47:50,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-08-24 08:47:50,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:50,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-08-24 08:47:50,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,720 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 442 flow. Second operand 5 states and 679 transitions. [2023-08-24 08:47:50,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 602 flow [2023-08-24 08:47:50,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 568 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 08:47:50,724 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 441 flow [2023-08-24 08:47:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-24 08:47:50,725 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 43 predicate places. [2023-08-24 08:47:50,725 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 441 flow [2023-08-24 08:47:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:50,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 08:47:50,726 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:50,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 395300103, now seen corresponding path program 4 times [2023-08-24 08:47:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346917791] [2023-08-24 08:47:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346917791] [2023-08-24 08:47:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346917791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:50,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057341456] [2023-08-24 08:47:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:50,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:50,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 441 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:50,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:50,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:50,884 INFO L124 PetriNetUnfolderBase]: 118/216 cut-off events. [2023-08-24 08:47:50,885 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2023-08-24 08:47:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 216 events. 118/216 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 644 event pairs, 29 based on Foata normal form. 4/218 useless extension candidates. Maximal degree in co-relation 1066. Up to 158 conditions per place. [2023-08-24 08:47:50,887 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 40 selfloop transitions, 18 changer transitions 1/59 dead transitions. [2023-08-24 08:47:50,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 597 flow [2023-08-24 08:47:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 680 transitions. [2023-08-24 08:47:50,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 08:47:50,890 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 680 transitions. [2023-08-24 08:47:50,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 680 transitions. [2023-08-24 08:47:50,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:50,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 680 transitions. [2023-08-24 08:47:50,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,895 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 441 flow. Second operand 5 states and 680 transitions. [2023-08-24 08:47:50,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 597 flow [2023-08-24 08:47:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 557 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-24 08:47:50,900 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 423 flow [2023-08-24 08:47:50,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-24 08:47:50,900 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-08-24 08:47:50,901 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 423 flow [2023-08-24 08:47:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:50,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 08:47:50,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:50,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1397649263, now seen corresponding path program 6 times [2023-08-24 08:47:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928916825] [2023-08-24 08:47:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:50,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:50,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:50,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928916825] [2023-08-24 08:47:50,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928916825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:50,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:50,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:47:50,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478130079] [2023-08-24 08:47:50,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:50,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:47:50,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:47:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:47:50,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:47:50,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:50,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:47:50,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:51,039 INFO L124 PetriNetUnfolderBase]: 107/191 cut-off events. [2023-08-24 08:47:51,039 INFO L125 PetriNetUnfolderBase]: For 983/983 co-relation queries the response was YES. [2023-08-24 08:47:51,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 191 events. 107/191 cut-off events. For 983/983 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 534 event pairs, 26 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 921. Up to 141 conditions per place. [2023-08-24 08:47:51,041 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 42 selfloop transitions, 16 changer transitions 1/59 dead transitions. [2023-08-24 08:47:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 580 flow [2023-08-24 08:47:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:47:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:47:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-24 08:47:51,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 08:47:51,044 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-24 08:47:51,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-24 08:47:51,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:51,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-24 08:47:51,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,048 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,048 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 423 flow. Second operand 5 states and 682 transitions. [2023-08-24 08:47:51,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 580 flow [2023-08-24 08:47:51,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 534 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-24 08:47:51,052 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 394 flow [2023-08-24 08:47:51,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-08-24 08:47:51,052 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 39 predicate places. [2023-08-24 08:47:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 394 flow [2023-08-24 08:47:51,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:51,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:51,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 08:47:51,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:51,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 169907987, now seen corresponding path program 1 times [2023-08-24 08:47:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:51,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971176689] [2023-08-24 08:47:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:51,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:47:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971176689] [2023-08-24 08:47:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971176689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:47:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:47:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:47:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189011007] [2023-08-24 08:47:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:47:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:47:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:47:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:47:51,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 308 [2023-08-24 08:47:51,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:51,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 308 [2023-08-24 08:47:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:51,181 INFO L124 PetriNetUnfolderBase]: 94/178 cut-off events. [2023-08-24 08:47:51,182 INFO L125 PetriNetUnfolderBase]: For 919/927 co-relation queries the response was YES. [2023-08-24 08:47:51,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 178 events. 94/178 cut-off events. For 919/927 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 26 based on Foata normal form. 11/176 useless extension candidates. Maximal degree in co-relation 832. Up to 160 conditions per place. [2023-08-24 08:47:51,183 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 39 selfloop transitions, 2 changer transitions 5/54 dead transitions. [2023-08-24 08:47:51,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 500 flow [2023-08-24 08:47:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:47:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:47:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-24 08:47:51,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969155844155844 [2023-08-24 08:47:51,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-24 08:47:51,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-24 08:47:51,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:51,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-24 08:47:51,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,189 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 394 flow. Second operand 4 states and 489 transitions. [2023-08-24 08:47:51,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 500 flow [2023-08-24 08:47:51,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 449 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-24 08:47:51,192 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 367 flow [2023-08-24 08:47:51,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-24 08:47:51,193 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-08-24 08:47:51,193 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 367 flow [2023-08-24 08:47:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:51,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:51,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 08:47:51,194 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:51,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash 394242139, now seen corresponding path program 1 times [2023-08-24 08:47:51,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:51,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258236890] [2023-08-24 08:47:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:51,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258236890] [2023-08-24 08:47:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258236890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559638871] [2023-08-24 08:47:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:51,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:51,438 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) [2023-08-24 08:47:51,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 08:47:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:51,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:47:51,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:51,615 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 34 treesize of output 10 [2023-08-24 08:47:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:51,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:51,652 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 34 treesize of output 10 [2023-08-24 08:47:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559638871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:51,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-24 08:47:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530865017] [2023-08-24 08:47:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:47:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:47:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:47:51,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 308 [2023-08-24 08:47:51,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 367 flow. Second operand has 11 states, 11 states have (on average 108.36363636363636) internal successors, (1192), 11 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:51,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:51,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 308 [2023-08-24 08:47:51,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:52,075 INFO L124 PetriNetUnfolderBase]: 373/672 cut-off events. [2023-08-24 08:47:52,076 INFO L125 PetriNetUnfolderBase]: For 1859/1879 co-relation queries the response was YES. [2023-08-24 08:47:52,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 672 events. 373/672 cut-off events. For 1859/1879 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3066 event pairs, 31 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 1935. Up to 256 conditions per place. [2023-08-24 08:47:52,081 INFO L140 encePairwiseOnDemand]: 299/308 looper letters, 94 selfloop transitions, 50 changer transitions 21/173 dead transitions. [2023-08-24 08:47:52,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 173 transitions, 1471 flow [2023-08-24 08:47:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:47:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:47:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1365 transitions. [2023-08-24 08:47:52,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2023-08-24 08:47:52,085 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1365 transitions. [2023-08-24 08:47:52,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1365 transitions. [2023-08-24 08:47:52,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:52,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1365 transitions. [2023-08-24 08:47:52,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 113.75) internal successors, (1365), 12 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,093 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,093 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 367 flow. Second operand 12 states and 1365 transitions. [2023-08-24 08:47:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 173 transitions, 1471 flow [2023-08-24 08:47:52,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 173 transitions, 1427 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-24 08:47:52,100 INFO L231 Difference]: Finished difference. Result has 75 places, 98 transitions, 1026 flow [2023-08-24 08:47:52,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1026, PETRI_PLACES=75, PETRI_TRANSITIONS=98} [2023-08-24 08:47:52,100 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2023-08-24 08:47:52,100 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 98 transitions, 1026 flow [2023-08-24 08:47:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.36363636363636) internal successors, (1192), 11 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:52,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:52,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:52,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 08:47:52,306 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:52,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1826288127, now seen corresponding path program 2 times [2023-08-24 08:47:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:52,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541756707] [2023-08-24 08:47:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:52,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:47:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541756707] [2023-08-24 08:47:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541756707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165117825] [2023-08-24 08:47:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:47:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:52,462 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) [2023-08-24 08:47:52,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 08:47:52,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:47:52,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:52,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:47:52,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:52,619 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 34 treesize of output 10 [2023-08-24 08:47:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:47:52,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:52,645 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 34 treesize of output 10 [2023-08-24 08:47:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:47:52,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165117825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:52,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:52,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-08-24 08:47:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116339807] [2023-08-24 08:47:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:52,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:47:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:47:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:47:52,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 308 [2023-08-24 08:47:52,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 1026 flow. Second operand has 11 states, 11 states have (on average 108.45454545454545) internal successors, (1193), 11 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:52,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 308 [2023-08-24 08:47:52,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:52,942 INFO L124 PetriNetUnfolderBase]: 626/1146 cut-off events. [2023-08-24 08:47:52,942 INFO L125 PetriNetUnfolderBase]: For 4842/4871 co-relation queries the response was YES. [2023-08-24 08:47:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5566 conditions, 1146 events. 626/1146 cut-off events. For 4842/4871 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6070 event pairs, 84 based on Foata normal form. 22/1139 useless extension candidates. Maximal degree in co-relation 4662. Up to 446 conditions per place. [2023-08-24 08:47:52,952 INFO L140 encePairwiseOnDemand]: 301/308 looper letters, 98 selfloop transitions, 58 changer transitions 24/188 dead transitions. [2023-08-24 08:47:52,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 188 transitions, 2151 flow [2023-08-24 08:47:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:47:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:47:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 08:47:52,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36891233766233766 [2023-08-24 08:47:52,955 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 08:47:52,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 08:47:52,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:52,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 08:47:52,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,960 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,960 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 1026 flow. Second operand 8 states and 909 transitions. [2023-08-24 08:47:52,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 188 transitions, 2151 flow [2023-08-24 08:47:52,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 188 transitions, 2083 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-24 08:47:52,974 INFO L231 Difference]: Finished difference. Result has 86 places, 127 transitions, 1593 flow [2023-08-24 08:47:52,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1593, PETRI_PLACES=86, PETRI_TRANSITIONS=127} [2023-08-24 08:47:52,974 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2023-08-24 08:47:52,974 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 127 transitions, 1593 flow [2023-08-24 08:47:52,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.45454545454545) internal successors, (1193), 11 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:52,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:52,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:53,181 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,SelfDestructingSolverStorable16 [2023-08-24 08:47:53,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:47:53,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -545466844, now seen corresponding path program 3 times [2023-08-24 08:47:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583134754] [2023-08-24 08:47:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:47:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583134754] [2023-08-24 08:47:53,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583134754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019130489] [2023-08-24 08:47:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:47:53,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:53,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:53,710 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) [2023-08-24 08:47:53,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 08:47:53,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:47:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:53,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 08:47:53,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:53,933 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 15 treesize of output 11 [2023-08-24 08:47:53,969 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 6 treesize of output 5 [2023-08-24 08:47:54,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:54,092 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 08:47:54,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2023-08-24 08:47:54,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 18 [2023-08-24 08:47:54,189 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:47:54,189 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 [2023-08-24 08:47:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:47:54,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:54,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:54,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2023-08-24 08:47:54,537 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:54,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-08-24 08:47:54,594 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:54,595 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-08-24 08:47:54,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 42 [2023-08-24 08:48:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:48:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019130489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:00,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 08:48:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571702102] [2023-08-24 08:48:00,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:00,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:48:00,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:48:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:48:00,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 308 [2023-08-24 08:48:00,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 127 transitions, 1593 flow. Second operand has 21 states, 21 states have (on average 94.14285714285714) internal successors, (1977), 21 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:00,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:00,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 308 [2023-08-24 08:48:00,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:00,918 INFO L124 PetriNetUnfolderBase]: 688/1258 cut-off events. [2023-08-24 08:48:00,918 INFO L125 PetriNetUnfolderBase]: For 6780/6812 co-relation queries the response was YES. [2023-08-24 08:48:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 1258 events. 688/1258 cut-off events. For 6780/6812 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6871 event pairs, 93 based on Foata normal form. 24/1262 useless extension candidates. Maximal degree in co-relation 6443. Up to 642 conditions per place. [2023-08-24 08:48:00,930 INFO L140 encePairwiseOnDemand]: 300/308 looper letters, 91 selfloop transitions, 54 changer transitions 41/194 dead transitions. [2023-08-24 08:48:00,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 194 transitions, 2447 flow [2023-08-24 08:48:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:48:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:48:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2023-08-24 08:48:00,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32012987012987015 [2023-08-24 08:48:00,936 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2023-08-24 08:48:00,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2023-08-24 08:48:00,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:00,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2023-08-24 08:48:00,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:00,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:00,943 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:00,943 INFO L175 Difference]: Start difference. First operand has 86 places, 127 transitions, 1593 flow. Second operand 10 states and 986 transitions. [2023-08-24 08:48:00,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 194 transitions, 2447 flow [2023-08-24 08:48:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 194 transitions, 2375 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-24 08:48:00,965 INFO L231 Difference]: Finished difference. Result has 93 places, 130 transitions, 1695 flow [2023-08-24 08:48:00,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1695, PETRI_PLACES=93, PETRI_TRANSITIONS=130} [2023-08-24 08:48:00,966 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2023-08-24 08:48:00,966 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 130 transitions, 1695 flow [2023-08-24 08:48:00,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.14285714285714) internal successors, (1977), 21 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:00,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:00,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:00,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 08:48:01,173 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:01,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1675522190, now seen corresponding path program 4 times [2023-08-24 08:48:01,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698335171] [2023-08-24 08:48:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:01,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:01,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698335171] [2023-08-24 08:48:01,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698335171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:01,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030718946] [2023-08-24 08:48:01,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:48:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:01,279 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) [2023-08-24 08:48:01,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 08:48:01,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:48:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:01,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:01,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:01,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:01,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030718946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:01,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:01,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:48:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803384297] [2023-08-24 08:48:01,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:48:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:48:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:48:01,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:01,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 130 transitions, 1695 flow. Second operand has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:01,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:01,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:01,829 INFO L124 PetriNetUnfolderBase]: 831/1458 cut-off events. [2023-08-24 08:48:01,830 INFO L125 PetriNetUnfolderBase]: For 8049/8049 co-relation queries the response was YES. [2023-08-24 08:48:01,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7474 conditions, 1458 events. 831/1458 cut-off events. For 8049/8049 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7537 event pairs, 175 based on Foata normal form. 88/1544 useless extension candidates. Maximal degree in co-relation 7391. Up to 1030 conditions per place. [2023-08-24 08:48:01,846 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 133 selfloop transitions, 90 changer transitions 3/226 dead transitions. [2023-08-24 08:48:01,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 226 transitions, 3093 flow [2023-08-24 08:48:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:48:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:48:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1482 transitions. [2023-08-24 08:48:01,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374262101534829 [2023-08-24 08:48:01,848 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1482 transitions. [2023-08-24 08:48:01,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1482 transitions. [2023-08-24 08:48:01,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:01,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1482 transitions. [2023-08-24 08:48:01,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.72727272727272) internal successors, (1482), 11 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:01,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:01,855 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:01,855 INFO L175 Difference]: Start difference. First operand has 93 places, 130 transitions, 1695 flow. Second operand 11 states and 1482 transitions. [2023-08-24 08:48:01,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 226 transitions, 3093 flow [2023-08-24 08:48:01,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 226 transitions, 2844 flow, removed 112 selfloop flow, removed 4 redundant places. [2023-08-24 08:48:01,879 INFO L231 Difference]: Finished difference. Result has 102 places, 182 transitions, 2407 flow [2023-08-24 08:48:01,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2407, PETRI_PLACES=102, PETRI_TRANSITIONS=182} [2023-08-24 08:48:01,880 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 80 predicate places. [2023-08-24 08:48:01,880 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 182 transitions, 2407 flow [2023-08-24 08:48:01,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:01,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:01,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:01,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:02,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:02,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash -850743530, now seen corresponding path program 5 times [2023-08-24 08:48:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:02,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604714212] [2023-08-24 08:48:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:02,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604714212] [2023-08-24 08:48:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604714212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118655926] [2023-08-24 08:48:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:48:02,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:02,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:02,179 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) [2023-08-24 08:48:02,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 08:48:02,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:02,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:02,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:02,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:02,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 08:48:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118655926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:02,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:48:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287597930] [2023-08-24 08:48:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:02,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:48:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:48:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:48:02,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 182 transitions, 2407 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:02,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:02,789 INFO L124 PetriNetUnfolderBase]: 776/1383 cut-off events. [2023-08-24 08:48:02,789 INFO L125 PetriNetUnfolderBase]: For 7625/7625 co-relation queries the response was YES. [2023-08-24 08:48:02,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7953 conditions, 1383 events. 776/1383 cut-off events. For 7625/7625 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7261 event pairs, 204 based on Foata normal form. 62/1443 useless extension candidates. Maximal degree in co-relation 6732. Up to 1015 conditions per place. [2023-08-24 08:48:02,802 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 131 selfloop transitions, 101 changer transitions 8/240 dead transitions. [2023-08-24 08:48:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 240 transitions, 3474 flow [2023-08-24 08:48:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:48:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:48:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2007 transitions. [2023-08-24 08:48:02,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344155844155844 [2023-08-24 08:48:02,808 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2007 transitions. [2023-08-24 08:48:02,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2007 transitions. [2023-08-24 08:48:02,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:02,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2007 transitions. [2023-08-24 08:48:02,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.8) internal successors, (2007), 15 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,821 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,821 INFO L175 Difference]: Start difference. First operand has 102 places, 182 transitions, 2407 flow. Second operand 15 states and 2007 transitions. [2023-08-24 08:48:02,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 240 transitions, 3474 flow [2023-08-24 08:48:02,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 240 transitions, 3172 flow, removed 148 selfloop flow, removed 1 redundant places. [2023-08-24 08:48:02,856 INFO L231 Difference]: Finished difference. Result has 118 places, 194 transitions, 2599 flow [2023-08-24 08:48:02,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2599, PETRI_PLACES=118, PETRI_TRANSITIONS=194} [2023-08-24 08:48:02,856 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2023-08-24 08:48:02,856 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 194 transitions, 2599 flow [2023-08-24 08:48:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:02,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:02,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 08:48:03,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:03,063 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:03,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1466891166, now seen corresponding path program 6 times [2023-08-24 08:48:03,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:03,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342020470] [2023-08-24 08:48:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:48:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342020470] [2023-08-24 08:48:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342020470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884547268] [2023-08-24 08:48:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:48:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:03,717 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) [2023-08-24 08:48:03,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 08:48:03,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:48:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:03,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 08:48:03,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:03,959 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 08:48:03,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2023-08-24 08:48:03,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 15 [2023-08-24 08:48:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:03,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:04,015 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_547 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2023-08-24 08:48:04,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:04,026 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-08-24 08:48:04,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2023-08-24 08:48:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:48:04,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884547268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:04,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-08-24 08:48:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278210840] [2023-08-24 08:48:04,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:04,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:48:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:48:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2023-08-24 08:48:04,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 308 [2023-08-24 08:48:04,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 194 transitions, 2599 flow. Second operand has 19 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:04,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:04,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 308 [2023-08-24 08:48:04,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:06,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:48:06,910 INFO L124 PetriNetUnfolderBase]: 899/1628 cut-off events. [2023-08-24 08:48:06,910 INFO L125 PetriNetUnfolderBase]: For 11493/11535 co-relation queries the response was YES. [2023-08-24 08:48:06,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9832 conditions, 1628 events. 899/1628 cut-off events. For 11493/11535 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9184 event pairs, 58 based on Foata normal form. 38/1643 useless extension candidates. Maximal degree in co-relation 9429. Up to 1060 conditions per place. [2023-08-24 08:48:06,926 INFO L140 encePairwiseOnDemand]: 295/308 looper letters, 187 selfloop transitions, 101 changer transitions 4/300 dead transitions. [2023-08-24 08:48:06,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 300 transitions, 4186 flow [2023-08-24 08:48:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:48:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:48:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1698 transitions. [2023-08-24 08:48:06,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242933537051184 [2023-08-24 08:48:06,930 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1698 transitions. [2023-08-24 08:48:06,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1698 transitions. [2023-08-24 08:48:06,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:06,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1698 transitions. [2023-08-24 08:48:06,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.88235294117646) internal successors, (1698), 17 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:06,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:06,938 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:06,938 INFO L175 Difference]: Start difference. First operand has 118 places, 194 transitions, 2599 flow. Second operand 17 states and 1698 transitions. [2023-08-24 08:48:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 300 transitions, 4186 flow [2023-08-24 08:48:06,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 300 transitions, 3949 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-24 08:48:06,982 INFO L231 Difference]: Finished difference. Result has 130 places, 251 transitions, 3416 flow [2023-08-24 08:48:06,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3416, PETRI_PLACES=130, PETRI_TRANSITIONS=251} [2023-08-24 08:48:06,983 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2023-08-24 08:48:06,983 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 251 transitions, 3416 flow [2023-08-24 08:48:06,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:06,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:06,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:06,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:07,189 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:07,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -573920790, now seen corresponding path program 7 times [2023-08-24 08:48:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417897538] [2023-08-24 08:48:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417897538] [2023-08-24 08:48:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417897538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545348317] [2023-08-24 08:48:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:48:07,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:07,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:07,307 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) [2023-08-24 08:48:07,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 08:48:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:07,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:07,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:07,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:07,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545348317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:07,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:07,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:48:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992889882] [2023-08-24 08:48:07,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:48:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:48:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:48:07,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:07,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 251 transitions, 3416 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:07,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:07,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:07,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:08,020 INFO L124 PetriNetUnfolderBase]: 1128/1997 cut-off events. [2023-08-24 08:48:08,020 INFO L125 PetriNetUnfolderBase]: For 16754/16754 co-relation queries the response was YES. [2023-08-24 08:48:08,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 1997 events. 1128/1997 cut-off events. For 16754/16754 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11154 event pairs, 120 based on Foata normal form. 88/2079 useless extension candidates. Maximal degree in co-relation 12685. Up to 884 conditions per place. [2023-08-24 08:48:08,048 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 251 selfloop transitions, 121 changer transitions 7/379 dead transitions. [2023-08-24 08:48:08,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 379 transitions, 5848 flow [2023-08-24 08:48:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:48:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:48:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1750 transitions. [2023-08-24 08:48:08,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370629370629371 [2023-08-24 08:48:08,051 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1750 transitions. [2023-08-24 08:48:08,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1750 transitions. [2023-08-24 08:48:08,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:08,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1750 transitions. [2023-08-24 08:48:08,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.6153846153846) internal successors, (1750), 13 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,057 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,057 INFO L175 Difference]: Start difference. First operand has 130 places, 251 transitions, 3416 flow. Second operand 13 states and 1750 transitions. [2023-08-24 08:48:08,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 379 transitions, 5848 flow [2023-08-24 08:48:08,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 379 transitions, 5495 flow, removed 171 selfloop flow, removed 3 redundant places. [2023-08-24 08:48:08,127 INFO L231 Difference]: Finished difference. Result has 146 places, 300 transitions, 4367 flow [2023-08-24 08:48:08,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4367, PETRI_PLACES=146, PETRI_TRANSITIONS=300} [2023-08-24 08:48:08,128 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2023-08-24 08:48:08,128 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 300 transitions, 4367 flow [2023-08-24 08:48:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:08,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:08,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:08,333 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,SelfDestructingSolverStorable21 [2023-08-24 08:48:08,334 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:08,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2057165143, now seen corresponding path program 8 times [2023-08-24 08:48:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133851166] [2023-08-24 08:48:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:08,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:08,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:08,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133851166] [2023-08-24 08:48:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133851166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:08,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230900438] [2023-08-24 08:48:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:48:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:08,437 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) [2023-08-24 08:48:08,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 08:48:08,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:08,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:08,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:08,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:08,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230900438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:08,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:08,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:48:08,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930234624] [2023-08-24 08:48:08,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:08,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:48:08,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:48:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:48:08,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:08,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 300 transitions, 4367 flow. Second operand has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:08,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:08,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:09,232 INFO L124 PetriNetUnfolderBase]: 1269/2230 cut-off events. [2023-08-24 08:48:09,232 INFO L125 PetriNetUnfolderBase]: For 22768/22768 co-relation queries the response was YES. [2023-08-24 08:48:09,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16277 conditions, 2230 events. 1269/2230 cut-off events. For 22768/22768 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12709 event pairs, 122 based on Foata normal form. 88/2312 useless extension candidates. Maximal degree in co-relation 15210. Up to 947 conditions per place. [2023-08-24 08:48:09,250 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 269 selfloop transitions, 164 changer transitions 15/448 dead transitions. [2023-08-24 08:48:09,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 448 transitions, 7234 flow [2023-08-24 08:48:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:48:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:48:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2150 transitions. [2023-08-24 08:48:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362824675324675 [2023-08-24 08:48:09,254 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2150 transitions. [2023-08-24 08:48:09,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2150 transitions. [2023-08-24 08:48:09,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:09,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2150 transitions. [2023-08-24 08:48:09,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 134.375) internal successors, (2150), 16 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:09,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:09,261 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:09,261 INFO L175 Difference]: Start difference. First operand has 146 places, 300 transitions, 4367 flow. Second operand 16 states and 2150 transitions. [2023-08-24 08:48:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 448 transitions, 7234 flow [2023-08-24 08:48:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 448 transitions, 6767 flow, removed 193 selfloop flow, removed 2 redundant places. [2023-08-24 08:48:09,357 INFO L231 Difference]: Finished difference. Result has 167 places, 367 transitions, 5522 flow [2023-08-24 08:48:09,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5522, PETRI_PLACES=167, PETRI_TRANSITIONS=367} [2023-08-24 08:48:09,357 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2023-08-24 08:48:09,357 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 367 transitions, 5522 flow [2023-08-24 08:48:09,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:09,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:09,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:09,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:09,558 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,SelfDestructingSolverStorable22 [2023-08-24 08:48:09,559 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:09,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2049943007, now seen corresponding path program 9 times [2023-08-24 08:48:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:09,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873207400] [2023-08-24 08:48:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873207400] [2023-08-24 08:48:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873207400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502322899] [2023-08-24 08:48:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:48:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:09,654 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) [2023-08-24 08:48:09,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 08:48:09,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:48:09,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:09,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:09,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:09,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:09,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502322899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:09,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:09,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:48:09,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491915932] [2023-08-24 08:48:09,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:09,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:48:09,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:48:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:48:09,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:09,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 367 transitions, 5522 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:09,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:09,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:10,482 INFO L124 PetriNetUnfolderBase]: 1213/2174 cut-off events. [2023-08-24 08:48:10,482 INFO L125 PetriNetUnfolderBase]: For 26260/26260 co-relation queries the response was YES. [2023-08-24 08:48:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16754 conditions, 2174 events. 1213/2174 cut-off events. For 26260/26260 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12711 event pairs, 142 based on Foata normal form. 28/2196 useless extension candidates. Maximal degree in co-relation 15638. Up to 1008 conditions per place. [2023-08-24 08:48:10,505 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 276 selfloop transitions, 145 changer transitions 3/424 dead transitions. [2023-08-24 08:48:10,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 424 transitions, 7098 flow [2023-08-24 08:48:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:48:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:48:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1744 transitions. [2023-08-24 08:48:10,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355644355644356 [2023-08-24 08:48:10,508 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1744 transitions. [2023-08-24 08:48:10,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1744 transitions. [2023-08-24 08:48:10,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:10,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1744 transitions. [2023-08-24 08:48:10,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.15384615384616) internal successors, (1744), 13 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:10,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:10,514 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:10,514 INFO L175 Difference]: Start difference. First operand has 167 places, 367 transitions, 5522 flow. Second operand 13 states and 1744 transitions. [2023-08-24 08:48:10,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 424 transitions, 7098 flow [2023-08-24 08:48:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 424 transitions, 6431 flow, removed 252 selfloop flow, removed 6 redundant places. [2023-08-24 08:48:10,659 INFO L231 Difference]: Finished difference. Result has 175 places, 364 transitions, 5143 flow [2023-08-24 08:48:10,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5143, PETRI_PLACES=175, PETRI_TRANSITIONS=364} [2023-08-24 08:48:10,659 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2023-08-24 08:48:10,659 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 364 transitions, 5143 flow [2023-08-24 08:48:10,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:10,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:10,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:10,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:10,865 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,SelfDestructingSolverStorable23 [2023-08-24 08:48:10,865 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:10,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1011079955, now seen corresponding path program 10 times [2023-08-24 08:48:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961512573] [2023-08-24 08:48:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:10,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:10,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961512573] [2023-08-24 08:48:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961512573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:10,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383915355] [2023-08-24 08:48:10,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:48:10,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:10,981 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) [2023-08-24 08:48:11,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 08:48:11,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:48:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:11,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:11,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:11,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 08:48:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383915355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:11,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:11,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:48:11,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519840370] [2023-08-24 08:48:11,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:48:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:48:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:48:11,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:11,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 364 transitions, 5143 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:11,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:11,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:11,732 INFO L124 PetriNetUnfolderBase]: 1319/2332 cut-off events. [2023-08-24 08:48:11,732 INFO L125 PetriNetUnfolderBase]: For 27642/27642 co-relation queries the response was YES. [2023-08-24 08:48:11,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18105 conditions, 2332 events. 1319/2332 cut-off events. For 27642/27642 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13661 event pairs, 148 based on Foata normal form. 16/2342 useless extension candidates. Maximal degree in co-relation 17628. Up to 1056 conditions per place. [2023-08-24 08:48:11,751 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 261 selfloop transitions, 193 changer transitions 8/462 dead transitions. [2023-08-24 08:48:11,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 462 transitions, 7487 flow [2023-08-24 08:48:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:48:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:48:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1879 transitions. [2023-08-24 08:48:11,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435760667903525 [2023-08-24 08:48:11,754 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1879 transitions. [2023-08-24 08:48:11,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1879 transitions. [2023-08-24 08:48:11,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:11,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1879 transitions. [2023-08-24 08:48:11,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.21428571428572) internal successors, (1879), 14 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:11,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 308.0) internal successors, (4620), 15 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:11,760 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 308.0) internal successors, (4620), 15 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:11,760 INFO L175 Difference]: Start difference. First operand has 175 places, 364 transitions, 5143 flow. Second operand 14 states and 1879 transitions. [2023-08-24 08:48:11,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 462 transitions, 7487 flow [2023-08-24 08:48:11,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 462 transitions, 7220 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 08:48:11,890 INFO L231 Difference]: Finished difference. Result has 185 places, 396 transitions, 6122 flow [2023-08-24 08:48:11,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6122, PETRI_PLACES=185, PETRI_TRANSITIONS=396} [2023-08-24 08:48:11,891 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 163 predicate places. [2023-08-24 08:48:11,891 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 396 transitions, 6122 flow [2023-08-24 08:48:11,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:11,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:11,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:11,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:12,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 08:48:12,096 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:12,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:12,097 INFO L85 PathProgramCache]: Analyzing trace with hash 491336879, now seen corresponding path program 11 times [2023-08-24 08:48:12,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:12,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016662948] [2023-08-24 08:48:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:12,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016662948] [2023-08-24 08:48:12,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016662948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754027342] [2023-08-24 08:48:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:48:12,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:12,214 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) [2023-08-24 08:48:12,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 08:48:12,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:12,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:12,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:12,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754027342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:12,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:48:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423033923] [2023-08-24 08:48:12,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:48:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:48:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:48:12,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:12,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 396 transitions, 6122 flow. Second operand has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:12,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:12,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:12,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:13,088 INFO L124 PetriNetUnfolderBase]: 1326/2353 cut-off events. [2023-08-24 08:48:13,088 INFO L125 PetriNetUnfolderBase]: For 32494/32494 co-relation queries the response was YES. [2023-08-24 08:48:13,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19289 conditions, 2353 events. 1326/2353 cut-off events. For 32494/32494 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13880 event pairs, 144 based on Foata normal form. 12/2359 useless extension candidates. Maximal degree in co-relation 18932. Up to 1056 conditions per place. [2023-08-24 08:48:13,110 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 268 selfloop transitions, 192 changer transitions 15/475 dead transitions. [2023-08-24 08:48:13,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 475 transitions, 8288 flow [2023-08-24 08:48:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:48:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:48:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2271 transitions. [2023-08-24 08:48:13,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337280366692131 [2023-08-24 08:48:13,114 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2271 transitions. [2023-08-24 08:48:13,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2271 transitions. [2023-08-24 08:48:13,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:13,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2271 transitions. [2023-08-24 08:48:13,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.58823529411765) internal successors, (2271), 17 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:13,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:13,122 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:13,122 INFO L175 Difference]: Start difference. First operand has 185 places, 396 transitions, 6122 flow. Second operand 17 states and 2271 transitions. [2023-08-24 08:48:13,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 475 transitions, 8288 flow [2023-08-24 08:48:13,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 475 transitions, 7884 flow, removed 151 selfloop flow, removed 5 redundant places. [2023-08-24 08:48:13,305 INFO L231 Difference]: Finished difference. Result has 201 places, 402 transitions, 6533 flow [2023-08-24 08:48:13,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6533, PETRI_PLACES=201, PETRI_TRANSITIONS=402} [2023-08-24 08:48:13,305 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 179 predicate places. [2023-08-24 08:48:13,305 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 402 transitions, 6533 flow [2023-08-24 08:48:13,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:13,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:13,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:13,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:13,506 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:13,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash -800975087, now seen corresponding path program 12 times [2023-08-24 08:48:13,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490078074] [2023-08-24 08:48:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:13,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490078074] [2023-08-24 08:48:13,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490078074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:13,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626243349] [2023-08-24 08:48:13,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:48:13,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:13,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:13,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:13,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 08:48:13,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:48:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:13,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:13,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:13,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626243349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:13,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:48:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743119394] [2023-08-24 08:48:13,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:48:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:48:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:48:13,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:13,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 402 transitions, 6533 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:13,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:13,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:13,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:14,495 INFO L124 PetriNetUnfolderBase]: 1388/2475 cut-off events. [2023-08-24 08:48:14,495 INFO L125 PetriNetUnfolderBase]: For 35361/35361 co-relation queries the response was YES. [2023-08-24 08:48:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20660 conditions, 2475 events. 1388/2475 cut-off events. For 35361/35361 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14848 event pairs, 140 based on Foata normal form. 40/2509 useless extension candidates. Maximal degree in co-relation 20537. Up to 1086 conditions per place. [2023-08-24 08:48:14,517 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 242 selfloop transitions, 269 changer transitions 3/514 dead transitions. [2023-08-24 08:48:14,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 514 transitions, 9223 flow [2023-08-24 08:48:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:48:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:48:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2282 transitions. [2023-08-24 08:48:14,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358288770053476 [2023-08-24 08:48:14,520 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2282 transitions. [2023-08-24 08:48:14,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2282 transitions. [2023-08-24 08:48:14,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:14,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2282 transitions. [2023-08-24 08:48:14,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.23529411764707) internal successors, (2282), 17 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:14,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:14,526 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:14,527 INFO L175 Difference]: Start difference. First operand has 201 places, 402 transitions, 6533 flow. Second operand 17 states and 2282 transitions. [2023-08-24 08:48:14,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 514 transitions, 9223 flow [2023-08-24 08:48:14,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 514 transitions, 8945 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-24 08:48:14,704 INFO L231 Difference]: Finished difference. Result has 208 places, 454 transitions, 7983 flow [2023-08-24 08:48:14,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7983, PETRI_PLACES=208, PETRI_TRANSITIONS=454} [2023-08-24 08:48:14,705 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 186 predicate places. [2023-08-24 08:48:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 454 transitions, 7983 flow [2023-08-24 08:48:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:14,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:14,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:14,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 08:48:14,911 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:14,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1291641803, now seen corresponding path program 13 times [2023-08-24 08:48:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138154575] [2023-08-24 08:48:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:15,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138154575] [2023-08-24 08:48:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138154575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334165517] [2023-08-24 08:48:15,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:48:15,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:15,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:15,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 08:48:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:15,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:15,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:15,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 08:48:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334165517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:15,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:15,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:48:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113190865] [2023-08-24 08:48:15,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:15,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:48:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:48:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:48:15,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:15,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 454 transitions, 7983 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:15,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:15,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:15,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:15,897 INFO L124 PetriNetUnfolderBase]: 1451/2590 cut-off events. [2023-08-24 08:48:15,897 INFO L125 PetriNetUnfolderBase]: For 43606/43606 co-relation queries the response was YES. [2023-08-24 08:48:15,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 2590 events. 1451/2590 cut-off events. For 43606/43606 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15676 event pairs, 347 based on Foata normal form. 60/2644 useless extension candidates. Maximal degree in co-relation 22189. Up to 2185 conditions per place. [2023-08-24 08:48:15,917 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 437 selfloop transitions, 100 changer transitions 3/540 dead transitions. [2023-08-24 08:48:15,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 540 transitions, 10526 flow [2023-08-24 08:48:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:48:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:48:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2015 transitions. [2023-08-24 08:48:15,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614718614718617 [2023-08-24 08:48:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2015 transitions. [2023-08-24 08:48:15,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2015 transitions. [2023-08-24 08:48:15,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2015 transitions. [2023-08-24 08:48:15,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.33333333333334) internal successors, (2015), 15 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:15,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:15,928 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:15,928 INFO L175 Difference]: Start difference. First operand has 208 places, 454 transitions, 7983 flow. Second operand 15 states and 2015 transitions. [2023-08-24 08:48:15,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 540 transitions, 10526 flow [2023-08-24 08:48:16,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 540 transitions, 9840 flow, removed 162 selfloop flow, removed 10 redundant places. [2023-08-24 08:48:16,103 INFO L231 Difference]: Finished difference. Result has 217 places, 496 transitions, 8514 flow [2023-08-24 08:48:16,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=7291, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8514, PETRI_PLACES=217, PETRI_TRANSITIONS=496} [2023-08-24 08:48:16,104 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2023-08-24 08:48:16,104 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 496 transitions, 8514 flow [2023-08-24 08:48:16,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:16,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:16,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:16,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:16,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 08:48:16,309 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:16,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1611689269, now seen corresponding path program 14 times [2023-08-24 08:48:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961782566] [2023-08-24 08:48:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961782566] [2023-08-24 08:48:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961782566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766028362] [2023-08-24 08:48:16,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:48:16,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:16,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:16,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:16,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 08:48:16,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:16,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:48:16,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:16,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766028362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:16,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:16,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:48:16,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171832034] [2023-08-24 08:48:16,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:48:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:48:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:48:16,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 08:48:16,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 496 transitions, 8514 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:16,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:16,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 08:48:16,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:17,485 INFO L124 PetriNetUnfolderBase]: 1722/3019 cut-off events. [2023-08-24 08:48:17,485 INFO L125 PetriNetUnfolderBase]: For 50107/50107 co-relation queries the response was YES. [2023-08-24 08:48:17,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 3019 events. 1722/3019 cut-off events. For 50107/50107 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18493 event pairs, 123 based on Foata normal form. 106/3119 useless extension candidates. Maximal degree in co-relation 25501. Up to 1443 conditions per place. [2023-08-24 08:48:17,510 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 448 selfloop transitions, 220 changer transitions 0/668 dead transitions. [2023-08-24 08:48:17,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 668 transitions, 12355 flow [2023-08-24 08:48:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:48:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:48:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3073 transitions. [2023-08-24 08:48:17,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43379446640316205 [2023-08-24 08:48:17,514 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3073 transitions. [2023-08-24 08:48:17,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3073 transitions. [2023-08-24 08:48:17,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:17,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3073 transitions. [2023-08-24 08:48:17,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 133.6086956521739) internal successors, (3073), 23 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:17,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 308.0) internal successors, (7392), 24 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:17,523 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 308.0) internal successors, (7392), 24 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:17,523 INFO L175 Difference]: Start difference. First operand has 217 places, 496 transitions, 8514 flow. Second operand 23 states and 3073 transitions. [2023-08-24 08:48:17,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 668 transitions, 12355 flow [2023-08-24 08:48:17,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 668 transitions, 11772 flow, removed 264 selfloop flow, removed 3 redundant places. [2023-08-24 08:48:17,745 INFO L231 Difference]: Finished difference. Result has 249 places, 623 transitions, 10691 flow [2023-08-24 08:48:17,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=7931, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10691, PETRI_PLACES=249, PETRI_TRANSITIONS=623} [2023-08-24 08:48:17,746 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2023-08-24 08:48:17,746 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 623 transitions, 10691 flow [2023-08-24 08:48:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:17,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:17,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:48:17,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:17,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:48:17,948 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:48:17,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1464889495, now seen corresponding path program 15 times [2023-08-24 08:48:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:17,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717688354] [2023-08-24 08:48:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:48:18,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:18,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717688354] [2023-08-24 08:48:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717688354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:18,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635299552] [2023-08-24 08:48:18,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:48:18,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:18,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:18,045 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:18,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 08:48:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:48:18,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:18,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 08:48:18,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:18,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:18,218 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-24 08:48:18,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-24 08:48:18,262 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 15 treesize of output 11 [2023-08-24 08:48:18,301 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:48:18,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-08-24 08:48:18,329 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 6 treesize of output 5 [2023-08-24 08:48:18,347 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 6 treesize of output 5 [2023-08-24 08:48:18,371 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 6 treesize of output 5 [2023-08-24 08:48:18,402 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 6 treesize of output 5 [2023-08-24 08:48:18,483 INFO L322 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-08-24 08:48:18,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2023-08-24 08:48:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:48:18,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:18,693 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_934 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_214 Int) (~f_inv~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934))) (let ((.cse1 (select .cse2 c_~f~0.base)) (.cse0 (select (select .cse2 ~f_inv~0.base) (+ (* c_~counter~0 4) ~f_inv~0.offset)))) (or (<= c_~n~0 .cse0) (< .cse0 0) (< v_~counter~0_214 0) (= (select .cse1 (+ c_~f~0.offset (* v_~counter~0_214 4))) 0) (<= c_~n~0 v_~counter~0_214) (not (= c_~counter~0 (select .cse1 (+ c_~f~0.offset (* .cse0 4))))))))) is different from false [2023-08-24 08:48:18,816 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_932 (Array Int Int)) (v_ArrVal_934 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_214 Int) (~f_inv~0.offset Int)) (let ((.cse2 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_932) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934))) (let ((.cse0 (select .cse2 c_~f~0.base)) (.cse1 (select (select .cse2 ~f_inv~0.base) (+ (* c_~counter~0 4) ~f_inv~0.offset)))) (or (not (= (select .cse0 (+ (* .cse1 4) c_~f~0.offset)) c_~counter~0)) (<= c_~n~0 .cse1) (< v_~counter~0_214 0) (= (select .cse0 (+ c_~f~0.offset (* v_~counter~0_214 4))) 0) (< .cse1 0) (<= c_~n~0 v_~counter~0_214))))) is different from false [2023-08-24 08:48:18,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:18,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 111 [2023-08-24 08:48:19,090 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:19,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 57310 treesize of output 51995 [2023-08-24 08:48:19,498 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:19,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1936 treesize of output 1999 [2023-08-24 08:48:19,754 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:19,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2010 treesize of output 1641 [2023-08-24 08:48:20,085 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:20,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1426 treesize of output 1379 [2023-08-24 08:48:20,327 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 08:59:08,841 WARN L234 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 1184 DAG size of output: 1563 (called from [L 729] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-08-24 09:01:34,317 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 09:01:34,319 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 09:01:34,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 09:01:34,332 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:01:34,332 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 [2023-08-24 09:01:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:01:34,520 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. [2023-08-24 09:01:34,521 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 09:01:34,521 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 09:01:34,521 INFO L445 BasicCegarLoop]: Path program histogram: [15, 6, 4, 2, 1, 1, 1] [2023-08-24 09:01:34,524 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:01:34,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:01:34,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:01:34 BasicIcfg [2023-08-24 09:01:34,526 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:01:34,526 INFO L158 Benchmark]: Toolchain (without parser) took 833737.17ms. Allocated memory was 341.8MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 317.3MB in the beginning and 1.2GB in the end (delta: -893.7MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2023-08-24 09:01:34,527 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 341.8MB. Free memory was 319.8MB in the beginning and 319.6MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:01:34,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.20ms. Allocated memory is still 341.8MB. Free memory was 317.3MB in the beginning and 306.1MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 09:01:34,527 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.46ms. Allocated memory is still 341.8MB. Free memory was 306.1MB in the beginning and 304.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:01:34,527 INFO L158 Benchmark]: Boogie Preprocessor took 34.53ms. Allocated memory is still 341.8MB. Free memory was 304.0MB in the beginning and 301.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:01:34,527 INFO L158 Benchmark]: RCFGBuilder took 633.39ms. Allocated memory is still 341.8MB. Free memory was 301.9MB in the beginning and 266.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-08-24 09:01:34,528 INFO L158 Benchmark]: TraceAbstraction took 832712.98ms. Allocated memory was 341.8MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 265.5MB in the beginning and 1.2GB in the end (delta: -945.5MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2023-08-24 09:01:34,529 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 341.8MB. Free memory was 319.8MB in the beginning and 319.6MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 285.20ms. Allocated memory is still 341.8MB. Free memory was 317.3MB in the beginning and 306.1MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.46ms. Allocated memory is still 341.8MB. Free memory was 306.1MB in the beginning and 304.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.53ms. Allocated memory is still 341.8MB. Free memory was 304.0MB in the beginning and 301.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 633.39ms. Allocated memory is still 341.8MB. Free memory was 301.9MB in the beginning and 266.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 832712.98ms. Allocated memory was 341.8MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 265.5MB in the beginning and 1.2GB in the end (delta: -945.5MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 143 PlacesBefore, 22 PlacesAfterwards, 149 TransitionsBefore, 19 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 99 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 149 TotalNumberOfCompositions, 617 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 577, independent: 566, independent conditional: 0, independent unconditional: 566, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 298, independent: 293, independent conditional: 0, independent unconditional: 293, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 577, independent: 273, independent conditional: 0, independent unconditional: 273, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 298, unknown conditional: 0, unknown unconditional: 298] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 82]: 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 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - TimeoutResultAtElement [Line: 83]: 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 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 18ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 169 locations, 3 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: 832.6s, OverallIterations: 30, TraceHistogramMax: 2, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 13.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 885 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 885 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 94 IncrementalHoareTripleChecker+Unchecked, 94 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4771 IncrementalHoareTripleChecker+Invalid, 5015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 73 mSDtfsCounter, 4771 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 910 GetRequests, 563 SyntacticMatches, 40 SemanticMatches, 307 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10691occurred in iteration=29, InterpolantAutomatonStates: 280, 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: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 878 NumberOfCodeBlocks, 859 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1138 ConstructedInterpolants, 16 QuantifiedInterpolants, 4263 SizeOfPredicates, 71 NumberOfNonLiveVariables, 3644 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 62 InterpolantComputations, 13 PerfectInterpolantSequences, 230/339 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