/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-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:14:04,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:14:04,178 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 09:14:04,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:14:04,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:14:04,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:14:04,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:14:04,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:14:04,205 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:14:04,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:14:04,208 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:14:04,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:14:04,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:14:04,209 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:14:04,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:14:04,210 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:14:04,211 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:14:04,211 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:14:04,211 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:14:04,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:14:04,212 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:14:04,212 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:14:04,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:14:04,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:14:04,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:14:04,213 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:14:04,213 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:14:04,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:14:04,213 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:14:04,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:14:04,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:14:04,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:14:04,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:14:04,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:14:04,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:14:04,485 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:14:04,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-24 09:14:05,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:14:05,695 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:14:05,696 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-24 09:14:05,703 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0dac9df/fbc16c07a925436b836ce72b41cf7b39/FLAG4b7d0e2ca [2023-08-24 09:14:05,716 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0dac9df/fbc16c07a925436b836ce72b41cf7b39 [2023-08-24 09:14:05,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:14:05,721 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:14:05,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:14:05,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:14:05,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:14:05,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115076b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05, skipping insertion in model container [2023-08-24 09:14:05,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,754 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:14:05,874 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-more-buffer-mult2.wvr.c[4099,4112] [2023-08-24 09:14:05,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:14:05,889 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:14:05,906 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-more-buffer-mult2.wvr.c[4099,4112] [2023-08-24 09:14:05,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:14:05,914 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:14:05,914 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:14:05,919 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:14:05,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05 WrapperNode [2023-08-24 09:14:05,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:14:05,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:14:05,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:14:05,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:14:05,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,952 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 313 [2023-08-24 09:14:05,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:14:05,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:14:05,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:14:05,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:14:05,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,973 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:14:05,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:14:05,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:14:05,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:14:05,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (1/1) ... [2023-08-24 09:14:05,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:14:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:06,003 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 09:14:06,007 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 09:14:06,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:14:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:14:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:14:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:14:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:14:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:14:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 09:14:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:14:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:14:06,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:14:06,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:14:06,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:14:06,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:14:06,037 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 09:14:06,116 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:14:06,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:14:06,489 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:14:06,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:14:06,626 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 09:14:06,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:14:06 BoogieIcfgContainer [2023-08-24 09:14:06,628 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:14:06,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:14:06,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:14:06,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:14:06,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:14:05" (1/3) ... [2023-08-24 09:14:06,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514e17a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:14:06, skipping insertion in model container [2023-08-24 09:14:06,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:14:05" (2/3) ... [2023-08-24 09:14:06,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514e17a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:14:06, skipping insertion in model container [2023-08-24 09:14:06,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:14:06" (3/3) ... [2023-08-24 09:14:06,637 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-08-24 09:14:06,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:14:06,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:14:06,652 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:14:06,721 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 09:14:06,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 222 transitions, 476 flow [2023-08-24 09:14:06,835 INFO L124 PetriNetUnfolderBase]: 18/218 cut-off events. [2023-08-24 09:14:06,835 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:14:06,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 18/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-08-24 09:14:06,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 222 transitions, 476 flow [2023-08-24 09:14:06,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 206 transitions, 436 flow [2023-08-24 09:14:06,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:14:06,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 206 transitions, 436 flow [2023-08-24 09:14:06,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 206 transitions, 436 flow [2023-08-24 09:14:06,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 206 transitions, 436 flow [2023-08-24 09:14:06,894 INFO L124 PetriNetUnfolderBase]: 18/206 cut-off events. [2023-08-24 09:14:06,895 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:14:06,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 18/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-08-24 09:14:06,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-08-24 09:14:13,677 INFO L134 LiptonReduction]: Checked pairs total: 2906 [2023-08-24 09:14:13,677 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-08-24 09:14:13,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:14:13,705 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;@9d3122a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:14:13,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 09:14:13,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:14:13,730 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-08-24 09:14:13,734 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:14:13,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:13,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:13,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:13,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 751863311, now seen corresponding path program 1 times [2023-08-24 09:14:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869680762] [2023-08-24 09:14:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:14,149 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 09:14:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869680762] [2023-08-24 09:14:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869680762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:14,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 09:14:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137480568] [2023-08-24 09:14:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:14,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:14:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:14:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:14:14,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 423 [2023-08-24 09:14:14,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 09:14:14,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:14,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 423 [2023-08-24 09:14:14,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:14,475 INFO L124 PetriNetUnfolderBase]: 1619/2217 cut-off events. [2023-08-24 09:14:14,475 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-08-24 09:14:14,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 2217 events. 1619/2217 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8947 event pairs, 272 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3417. Up to 1413 conditions per place. [2023-08-24 09:14:14,489 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-24 09:14:14,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2023-08-24 09:14:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:14:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:14:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-24 09:14:14,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988179669030733 [2023-08-24 09:14:14,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-24 09:14:14,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-24 09:14:14,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:14,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-24 09:14:14,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states 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 09:14:14,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:14,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:14,517 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 633 transitions. [2023-08-24 09:14:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2023-08-24 09:14:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 09:14:14,522 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-08-24 09:14:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-24 09:14:14,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-24 09:14:14,526 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-08-24 09:14:14,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 09:14:14,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:14,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:14:14,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:14,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 601720292, now seen corresponding path program 1 times [2023-08-24 09:14:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:14,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671905539] [2023-08-24 09:14:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:14,612 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 09:14:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671905539] [2023-08-24 09:14:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671905539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:14:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862757296] [2023-08-24 09:14:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:14,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:14:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:14:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:14:14,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 423 [2023-08-24 09:14:14,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:14,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:14,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 423 [2023-08-24 09:14:14,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:14,871 INFO L124 PetriNetUnfolderBase]: 2187/2884 cut-off events. [2023-08-24 09:14:14,871 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-24 09:14:14,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6424 conditions, 2884 events. 2187/2884 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11694 event pairs, 596 based on Foata normal form. 76/2324 useless extension candidates. Maximal degree in co-relation 2213. Up to 1820 conditions per place. [2023-08-24 09:14:14,882 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-24 09:14:14,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 264 flow [2023-08-24 09:14:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:14:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:14:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-24 09:14:14,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933018124507486 [2023-08-24 09:14:14,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-24 09:14:14,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-24 09:14:14,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:14,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-24 09:14:14,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 09:14:14,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:14,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:14,888 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 626 transitions. [2023-08-24 09:14:14,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 264 flow [2023-08-24 09:14:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:14,891 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-08-24 09:14:14,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-24 09:14:14,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-24 09:14:14,894 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-08-24 09:14:14,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:14,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:14,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:14:14,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:14,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1559273327, now seen corresponding path program 1 times [2023-08-24 09:14:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:14,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771470536] [2023-08-24 09:14:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:14,988 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 09:14:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771470536] [2023-08-24 09:14:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771470536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:14:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173535446] [2023-08-24 09:14:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:14:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:14:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:14:14,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 423 [2023-08-24 09:14:14,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:14,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:14,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 423 [2023-08-24 09:14:14,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:15,215 INFO L124 PetriNetUnfolderBase]: 2417/3341 cut-off events. [2023-08-24 09:14:15,215 INFO L125 PetriNetUnfolderBase]: For 1259/1259 co-relation queries the response was YES. [2023-08-24 09:14:15,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 3341 events. 2417/3341 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15397 event pairs, 747 based on Foata normal form. 100/3094 useless extension candidates. Maximal degree in co-relation 3824. Up to 2227 conditions per place. [2023-08-24 09:14:15,228 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-24 09:14:15,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 298 flow [2023-08-24 09:14:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:14:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:14:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-24 09:14:15,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49487785657998423 [2023-08-24 09:14:15,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-24 09:14:15,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-24 09:14:15,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:15,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-24 09:14:15,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 09:14:15,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:15,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 09:14:15,233 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 628 transitions. [2023-08-24 09:14:15,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 298 flow [2023-08-24 09:14:15,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:15,235 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-08-24 09:14:15,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-24 09:14:15,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-24 09:14:15,236 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-08-24 09:14:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:15,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:15,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:14:15,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:15,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1799412817, now seen corresponding path program 1 times [2023-08-24 09:14:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714338801] [2023-08-24 09:14:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:15,338 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 09:14:15,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:15,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714338801] [2023-08-24 09:14:15,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714338801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:15,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:15,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 09:14:15,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547175453] [2023-08-24 09:14:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:14:15,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:14:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:14:15,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-24 09:14:15,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 09:14:15,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:15,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-24 09:14:15,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:15,588 INFO L124 PetriNetUnfolderBase]: 2087/3075 cut-off events. [2023-08-24 09:14:15,588 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2023-08-24 09:14:15,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7511 conditions, 3075 events. 2087/3075 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15885 event pairs, 1506 based on Foata normal form. 73/3051 useless extension candidates. Maximal degree in co-relation 3812. Up to 2237 conditions per place. [2023-08-24 09:14:15,600 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 58 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-24 09:14:15,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 320 flow [2023-08-24 09:14:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:14:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:14:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 736 transitions. [2023-08-24 09:14:15,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43498817966903075 [2023-08-24 09:14:15,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 736 transitions. [2023-08-24 09:14:15,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 736 transitions. [2023-08-24 09:14:15,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:15,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 736 transitions. [2023-08-24 09:14:15,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 09:14:15,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 09:14:15,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 09:14:15,606 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 736 transitions. [2023-08-24 09:14:15,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 320 flow [2023-08-24 09:14:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:15,608 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2023-08-24 09:14:15,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-24 09:14:15,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-24 09:14:15,608 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2023-08-24 09:14:15,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 09:14:15,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:15,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 09:14:15,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 431883997, now seen corresponding path program 1 times [2023-08-24 09:14:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578625877] [2023-08-24 09:14:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:15,708 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 09:14:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578625877] [2023-08-24 09:14:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578625877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:15,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:14:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501111979] [2023-08-24 09:14:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:15,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:14:15,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:14:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:14:15,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-24 09:14:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 09:14:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-24 09:14:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:16,006 INFO L124 PetriNetUnfolderBase]: 2699/4093 cut-off events. [2023-08-24 09:14:16,006 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2023-08-24 09:14:16,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9810 conditions, 4093 events. 2699/4093 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23207 event pairs, 2028 based on Foata normal form. 134/4101 useless extension candidates. Maximal degree in co-relation 7649. Up to 2946 conditions per place. [2023-08-24 09:14:16,021 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-24 09:14:16,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 336 flow [2023-08-24 09:14:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:14:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:14:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-24 09:14:16,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43380614657210403 [2023-08-24 09:14:16,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-24 09:14:16,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-24 09:14:16,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:16,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-24 09:14:16,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 09:14:16,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 09:14:16,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 09:14:16,027 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 4 states and 734 transitions. [2023-08-24 09:14:16,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 336 flow [2023-08-24 09:14:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:16,029 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 157 flow [2023-08-24 09:14:16,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-24 09:14:16,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-08-24 09:14:16,030 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 157 flow [2023-08-24 09:14:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 09:14:16,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:16,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 09:14:16,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:16,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1232588294, now seen corresponding path program 1 times [2023-08-24 09:14:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50608252] [2023-08-24 09:14:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:16,370 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 09:14:16,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50608252] [2023-08-24 09:14:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50608252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:16,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:16,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:14:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244719231] [2023-08-24 09:14:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:14:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:14:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:14:16,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:14:16,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:14:16,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:16,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:14:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:17,302 INFO L124 PetriNetUnfolderBase]: 9193/13040 cut-off events. [2023-08-24 09:14:17,302 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-24 09:14:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30017 conditions, 13040 events. 9193/13040 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 68633 event pairs, 1332 based on Foata normal form. 88/13126 useless extension candidates. Maximal degree in co-relation 21486. Up to 8172 conditions per place. [2023-08-24 09:14:17,366 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 78 selfloop transitions, 7 changer transitions 27/112 dead transitions. [2023-08-24 09:14:17,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 112 transitions, 554 flow [2023-08-24 09:14:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:14:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:14:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1185 transitions. [2023-08-24 09:14:17,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466903073286052 [2023-08-24 09:14:17,369 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1185 transitions. [2023-08-24 09:14:17,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1185 transitions. [2023-08-24 09:14:17,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:17,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1185 transitions. [2023-08-24 09:14:17,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.5) internal successors, (1185), 6 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 09:14:17,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:17,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:17,376 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 157 flow. Second operand 6 states and 1185 transitions. [2023-08-24 09:14:17,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 112 transitions, 554 flow [2023-08-24 09:14:17,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 549 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:17,380 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 213 flow [2023-08-24 09:14:17,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-24 09:14:17,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2023-08-24 09:14:17,382 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 213 flow [2023-08-24 09:14:17,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:14:17,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:17,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 09:14:17,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:17,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1107812132, now seen corresponding path program 2 times [2023-08-24 09:14:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:17,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105711129] [2023-08-24 09:14:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:17,760 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 09:14:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105711129] [2023-08-24 09:14:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105711129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:17,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:17,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:14:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009751435] [2023-08-24 09:14:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:17,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:14:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:14:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:14:17,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 09:14:17,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:14:17,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:17,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 09:14:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:19,302 INFO L124 PetriNetUnfolderBase]: 13275/18924 cut-off events. [2023-08-24 09:14:19,303 INFO L125 PetriNetUnfolderBase]: For 13016/13016 co-relation queries the response was YES. [2023-08-24 09:14:19,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49061 conditions, 18924 events. 13275/18924 cut-off events. For 13016/13016 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 106512 event pairs, 1534 based on Foata normal form. 230/19152 useless extension candidates. Maximal degree in co-relation 36815. Up to 5222 conditions per place. [2023-08-24 09:14:19,399 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 196 selfloop transitions, 21 changer transitions 5/222 dead transitions. [2023-08-24 09:14:19,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 222 transitions, 1263 flow [2023-08-24 09:14:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:14:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:14:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1948 transitions. [2023-08-24 09:14:19,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46052009456264775 [2023-08-24 09:14:19,403 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1948 transitions. [2023-08-24 09:14:19,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1948 transitions. [2023-08-24 09:14:19,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:19,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1948 transitions. [2023-08-24 09:14:19,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.8) internal successors, (1948), 10 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states 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 09:14:19,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 09:14:19,412 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 09:14:19,412 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 213 flow. Second operand 10 states and 1948 transitions. [2023-08-24 09:14:19,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 222 transitions, 1263 flow [2023-08-24 09:14:19,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 222 transitions, 1253 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-24 09:14:19,430 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 396 flow [2023-08-24 09:14:19,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-08-24 09:14:19,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2023-08-24 09:14:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 396 flow [2023-08-24 09:14:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:14:19,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:19,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 09:14:19,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:19,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash -807453282, now seen corresponding path program 3 times [2023-08-24 09:14:19,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:19,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347873186] [2023-08-24 09:14:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:19,678 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 09:14:19,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347873186] [2023-08-24 09:14:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347873186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:14:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099477162] [2023-08-24 09:14:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:14:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:14:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:14:19,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 09:14:19,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:14:19,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:19,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 09:14:19,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:21,832 INFO L124 PetriNetUnfolderBase]: 16033/23230 cut-off events. [2023-08-24 09:14:21,833 INFO L125 PetriNetUnfolderBase]: For 36393/36393 co-relation queries the response was YES. [2023-08-24 09:14:21,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75494 conditions, 23230 events. 16033/23230 cut-off events. For 36393/36393 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 137117 event pairs, 3520 based on Foata normal form. 230/23458 useless extension candidates. Maximal degree in co-relation 64309. Up to 12922 conditions per place. [2023-08-24 09:14:21,925 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 136 selfloop transitions, 29 changer transitions 58/223 dead transitions. [2023-08-24 09:14:21,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 223 transitions, 1512 flow [2023-08-24 09:14:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:14:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:14:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1936 transitions. [2023-08-24 09:14:21,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45768321513002364 [2023-08-24 09:14:21,929 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1936 transitions. [2023-08-24 09:14:21,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1936 transitions. [2023-08-24 09:14:21,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:21,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1936 transitions. [2023-08-24 09:14:21,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states 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 09:14:21,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 09:14:21,937 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 09:14:21,937 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 396 flow. Second operand 10 states and 1936 transitions. [2023-08-24 09:14:21,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 223 transitions, 1512 flow [2023-08-24 09:14:22,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 223 transitions, 1491 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:22,212 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 674 flow [2023-08-24 09:14:22,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=674, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-08-24 09:14:22,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2023-08-24 09:14:22,213 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 674 flow [2023-08-24 09:14:22,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:14:22,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:22,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:22,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 09:14:22,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:22,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash 862480312, now seen corresponding path program 4 times [2023-08-24 09:14:22,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:22,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916454137] [2023-08-24 09:14:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:22,596 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 09:14:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916454137] [2023-08-24 09:14:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916454137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:22,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:22,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:14:22,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101112844] [2023-08-24 09:14:22,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:22,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:14:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:14:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:14:22,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:14:22,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:14:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:22,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:14:22,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:24,957 INFO L124 PetriNetUnfolderBase]: 18985/27752 cut-off events. [2023-08-24 09:14:24,957 INFO L125 PetriNetUnfolderBase]: For 66945/66945 co-relation queries the response was YES. [2023-08-24 09:14:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98767 conditions, 27752 events. 18985/27752 cut-off events. For 66945/66945 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 173139 event pairs, 3410 based on Foata normal form. 328/28078 useless extension candidates. Maximal degree in co-relation 93407. Up to 17102 conditions per place. [2023-08-24 09:14:25,127 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 144 selfloop transitions, 33 changer transitions 9/186 dead transitions. [2023-08-24 09:14:25,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 186 transitions, 1611 flow [2023-08-24 09:14:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:14:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:14:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1189 transitions. [2023-08-24 09:14:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46847911741528764 [2023-08-24 09:14:25,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1189 transitions. [2023-08-24 09:14:25,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1189 transitions. [2023-08-24 09:14:25,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:25,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1189 transitions. [2023-08-24 09:14:25,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 09:14:25,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:25,135 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:25,135 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 674 flow. Second operand 6 states and 1189 transitions. [2023-08-24 09:14:25,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 186 transitions, 1611 flow [2023-08-24 09:14:25,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 186 transitions, 1560 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-24 09:14:25,401 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 938 flow [2023-08-24 09:14:25,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=938, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-08-24 09:14:25,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-08-24 09:14:25,402 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 938 flow [2023-08-24 09:14:25,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:14:25,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:25,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:25,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 09:14:25,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:25,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1107798968, now seen corresponding path program 5 times [2023-08-24 09:14:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:25,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166105576] [2023-08-24 09:14:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:25,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166105576] [2023-08-24 09:14:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166105576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619602498] [2023-08-24 09:14:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:14:25,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:25,676 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 09:14:25,677 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 09:14:25,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:25,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:14:25,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:25,979 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 09:14:25,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:14:25,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619602498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:25,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:14:25,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-08-24 09:14:25,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036903307] [2023-08-24 09:14:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:25,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 09:14:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 09:14:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:14:25,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-24 09:14:25,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 938 flow. Second operand has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 09:14:25,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:25,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-24 09:14:25,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:28,460 INFO L124 PetriNetUnfolderBase]: 17697/25855 cut-off events. [2023-08-24 09:14:28,461 INFO L125 PetriNetUnfolderBase]: For 72595/72595 co-relation queries the response was YES. [2023-08-24 09:14:28,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95928 conditions, 25855 events. 17697/25855 cut-off events. For 72595/72595 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 157749 event pairs, 4790 based on Foata normal form. 302/26155 useless extension candidates. Maximal degree in co-relation 89320. Up to 18667 conditions per place. [2023-08-24 09:14:28,616 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 124 selfloop transitions, 33 changer transitions 39/196 dead transitions. [2023-08-24 09:14:28,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 196 transitions, 1680 flow [2023-08-24 09:14:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:14:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:14:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1566 transitions. [2023-08-24 09:14:28,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-08-24 09:14:28,620 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1566 transitions. [2023-08-24 09:14:28,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1566 transitions. [2023-08-24 09:14:28,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:28,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1566 transitions. [2023-08-24 09:14:28,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states 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 09:14:28,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:14:28,626 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:14:28,626 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 938 flow. Second operand 8 states and 1566 transitions. [2023-08-24 09:14:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 196 transitions, 1680 flow [2023-08-24 09:14:29,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 196 transitions, 1634 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 09:14:29,267 INFO L231 Difference]: Finished difference. Result has 99 places, 103 transitions, 992 flow [2023-08-24 09:14:29,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=99, PETRI_TRANSITIONS=103} [2023-08-24 09:14:29,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2023-08-24 09:14:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 103 transitions, 992 flow [2023-08-24 09:14:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 09:14:29,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:29,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:29,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 09:14:29,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 09:14:29,473 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:29,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash 598928652, now seen corresponding path program 6 times [2023-08-24 09:14:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:29,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935828888] [2023-08-24 09:14:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:29,782 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 09:14:29,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:29,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935828888] [2023-08-24 09:14:29,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935828888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:29,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:29,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:14:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094980732] [2023-08-24 09:14:29,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:14:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:14:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:14:29,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:14:29,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 103 transitions, 992 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:14:29,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:29,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:14:29,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:31,882 INFO L124 PetriNetUnfolderBase]: 15581/22605 cut-off events. [2023-08-24 09:14:31,882 INFO L125 PetriNetUnfolderBase]: For 71337/71337 co-relation queries the response was YES. [2023-08-24 09:14:31,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86244 conditions, 22605 events. 15581/22605 cut-off events. For 71337/71337 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 133340 event pairs, 4022 based on Foata normal form. 300/22903 useless extension candidates. Maximal degree in co-relation 81066. Up to 12037 conditions per place. [2023-08-24 09:14:31,986 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 147 selfloop transitions, 30 changer transitions 7/184 dead transitions. [2023-08-24 09:14:31,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1705 flow [2023-08-24 09:14:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:14:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:14:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1190 transitions. [2023-08-24 09:14:31,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46887312844759654 [2023-08-24 09:14:31,989 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1190 transitions. [2023-08-24 09:14:31,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1190 transitions. [2023-08-24 09:14:31,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:31,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1190 transitions. [2023-08-24 09:14:31,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 09:14:31,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:31,994 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:31,995 INFO L175 Difference]: Start difference. First operand has 99 places, 103 transitions, 992 flow. Second operand 6 states and 1190 transitions. [2023-08-24 09:14:31,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1705 flow [2023-08-24 09:14:32,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1625 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-24 09:14:32,280 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 973 flow [2023-08-24 09:14:32,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=973, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2023-08-24 09:14:32,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2023-08-24 09:14:32,281 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 973 flow [2023-08-24 09:14:32,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:14:32,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:32,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:32,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 09:14:32,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:32,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1979929344, now seen corresponding path program 7 times [2023-08-24 09:14:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098952737] [2023-08-24 09:14:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098952737] [2023-08-24 09:14:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098952737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139356584] [2023-08-24 09:14:32,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:14:32,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:32,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:32,689 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 09:14:32,691 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 09:14:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:32,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:14:32,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:33,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139356584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:33,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:33,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2023-08-24 09:14:33,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821052457] [2023-08-24 09:14:33,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:33,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:14:33,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:14:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:14:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 423 [2023-08-24 09:14:33,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 973 flow. Second operand has 17 states, 17 states have (on average 178.2941176470588) internal successors, (3031), 17 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states 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 09:14:33,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:33,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 423 [2023-08-24 09:14:33,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:38,294 INFO L124 PetriNetUnfolderBase]: 24873/36903 cut-off events. [2023-08-24 09:14:38,294 INFO L125 PetriNetUnfolderBase]: For 145133/145133 co-relation queries the response was YES. [2023-08-24 09:14:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147927 conditions, 36903 events. 24873/36903 cut-off events. For 145133/145133 co-relation queries the response was YES. Maximal size of possible extension queue 1420. Compared 245171 event pairs, 5516 based on Foata normal form. 1304/38205 useless extension candidates. Maximal degree in co-relation 135274. Up to 12005 conditions per place. [2023-08-24 09:14:38,509 INFO L140 encePairwiseOnDemand]: 412/423 looper letters, 411 selfloop transitions, 183 changer transitions 36/630 dead transitions. [2023-08-24 09:14:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 630 transitions, 6578 flow [2023-08-24 09:14:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:14:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:14:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5222 transitions. [2023-08-24 09:14:38,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089834515366433 [2023-08-24 09:14:38,518 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5222 transitions. [2023-08-24 09:14:38,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5222 transitions. [2023-08-24 09:14:38,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:38,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5222 transitions. [2023-08-24 09:14:38,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 186.5) internal successors, (5222), 28 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 09:14:38,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 423.0) internal successors, (12267), 29 states have internal predecessors, (12267), 0 states have call successors, (0), 0 states 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 09:14:38,537 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 423.0) internal successors, (12267), 29 states have internal predecessors, (12267), 0 states have call successors, (0), 0 states 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 09:14:38,537 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 973 flow. Second operand 28 states and 5222 transitions. [2023-08-24 09:14:38,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 630 transitions, 6578 flow [2023-08-24 09:14:39,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 630 transitions, 6200 flow, removed 120 selfloop flow, removed 4 redundant places. [2023-08-24 09:14:39,097 INFO L231 Difference]: Finished difference. Result has 139 places, 258 transitions, 3393 flow [2023-08-24 09:14:39,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3393, PETRI_PLACES=139, PETRI_TRANSITIONS=258} [2023-08-24 09:14:39,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2023-08-24 09:14:39,097 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 258 transitions, 3393 flow [2023-08-24 09:14:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 178.2941176470588) internal successors, (3031), 17 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states 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 09:14:39,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:39,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:39,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 09:14:39,303 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,SelfDestructingSolverStorable11 [2023-08-24 09:14:39,304 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:39,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 200213894, now seen corresponding path program 8 times [2023-08-24 09:14:39,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496069296] [2023-08-24 09:14:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:39,747 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 09:14:39,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:39,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496069296] [2023-08-24 09:14:39,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496069296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:14:39,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:14:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:14:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510566262] [2023-08-24 09:14:39,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:14:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:14:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:14:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:14:39,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:14:39,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 258 transitions, 3393 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:14:39,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:39,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:14:39,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:44,001 INFO L124 PetriNetUnfolderBase]: 23627/34905 cut-off events. [2023-08-24 09:14:44,001 INFO L125 PetriNetUnfolderBase]: For 244588/244588 co-relation queries the response was YES. [2023-08-24 09:14:44,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171862 conditions, 34905 events. 23627/34905 cut-off events. For 244588/244588 co-relation queries the response was YES. Maximal size of possible extension queue 1328. Compared 228361 event pairs, 7368 based on Foata normal form. 656/35559 useless extension candidates. Maximal degree in co-relation 158844. Up to 23721 conditions per place. [2023-08-24 09:14:44,408 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 191 selfloop transitions, 151 changer transitions 0/342 dead transitions. [2023-08-24 09:14:44,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 342 transitions, 4642 flow [2023-08-24 09:14:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:14:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:14:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1180 transitions. [2023-08-24 09:14:44,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649330181245075 [2023-08-24 09:14:44,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1180 transitions. [2023-08-24 09:14:44,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1180 transitions. [2023-08-24 09:14:44,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:44,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1180 transitions. [2023-08-24 09:14:44,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.66666666666666) internal successors, (1180), 6 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 09:14:44,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:44,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 09:14:44,415 INFO L175 Difference]: Start difference. First operand has 139 places, 258 transitions, 3393 flow. Second operand 6 states and 1180 transitions. [2023-08-24 09:14:44,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 342 transitions, 4642 flow [2023-08-24 09:14:46,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 342 transitions, 4338 flow, removed 78 selfloop flow, removed 3 redundant places. [2023-08-24 09:14:46,661 INFO L231 Difference]: Finished difference. Result has 143 places, 267 transitions, 3626 flow [2023-08-24 09:14:46,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3626, PETRI_PLACES=143, PETRI_TRANSITIONS=267} [2023-08-24 09:14:46,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2023-08-24 09:14:46,662 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 267 transitions, 3626 flow [2023-08-24 09:14:46,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:14:46,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:46,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 09:14:46,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:46,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:46,669 INFO L85 PathProgramCache]: Analyzing trace with hash -10653480, now seen corresponding path program 9 times [2023-08-24 09:14:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:46,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975434592] [2023-08-24 09:14:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:46,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975434592] [2023-08-24 09:14:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975434592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909854993] [2023-08-24 09:14:46,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:14:46,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:46,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:46,936 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 09:14:46,938 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 09:14:47,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:14:47,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:47,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:14:47,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:47,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909854993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:47,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:47,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2023-08-24 09:14:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953841807] [2023-08-24 09:14:47,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:47,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:14:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:14:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:14:47,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 09:14:47,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 267 transitions, 3626 flow. Second operand has 17 states, 17 states have (on average 176.52941176470588) internal successors, (3001), 17 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states 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 09:14:47,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:47,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 09:14:47,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:54,103 INFO L124 PetriNetUnfolderBase]: 31617/46723 cut-off events. [2023-08-24 09:14:54,104 INFO L125 PetriNetUnfolderBase]: For 381072/381072 co-relation queries the response was YES. [2023-08-24 09:14:54,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237703 conditions, 46723 events. 31617/46723 cut-off events. For 381072/381072 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 319848 event pairs, 7610 based on Foata normal form. 1308/48029 useless extension candidates. Maximal degree in co-relation 232102. Up to 18297 conditions per place. [2023-08-24 09:14:54,945 INFO L140 encePairwiseOnDemand]: 410/423 looper letters, 319 selfloop transitions, 451 changer transitions 9/779 dead transitions. [2023-08-24 09:14:54,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 779 transitions, 11079 flow [2023-08-24 09:14:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:14:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:14:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4930 transitions. [2023-08-24 09:14:54,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43166097539619996 [2023-08-24 09:14:54,951 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4930 transitions. [2023-08-24 09:14:54,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4930 transitions. [2023-08-24 09:14:54,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:54,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4930 transitions. [2023-08-24 09:14:54,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 182.59259259259258) internal successors, (4930), 27 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states 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 09:14:54,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 423.0) internal successors, (11844), 28 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states 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 09:14:54,970 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 423.0) internal successors, (11844), 28 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states 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 09:14:54,970 INFO L175 Difference]: Start difference. First operand has 143 places, 267 transitions, 3626 flow. Second operand 27 states and 4930 transitions. [2023-08-24 09:14:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 779 transitions, 11079 flow [2023-08-24 09:15:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 779 transitions, 9942 flow, removed 112 selfloop flow, removed 8 redundant places. [2023-08-24 09:15:03,181 INFO L231 Difference]: Finished difference. Result has 178 places, 536 transitions, 8234 flow [2023-08-24 09:15:03,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8234, PETRI_PLACES=178, PETRI_TRANSITIONS=536} [2023-08-24 09:15:03,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2023-08-24 09:15:03,182 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 536 transitions, 8234 flow [2023-08-24 09:15:03,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.52941176470588) internal successors, (3001), 17 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states 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 09:15:03,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:15:03,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:15:03,187 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 09:15:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:03,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:15:03,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:15:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1189184923, now seen corresponding path program 1 times [2023-08-24 09:15:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:15:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830087762] [2023-08-24 09:15:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:15:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:15:03,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:15:03,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830087762] [2023-08-24 09:15:03,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830087762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:15:03,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020714658] [2023-08-24 09:15:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:03,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:03,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:15:03,601 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 09:15:03,603 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 09:15:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:03,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:15:03,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:15:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:15:03,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:15:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:15:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020714658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:15:03,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:15:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 16 [2023-08-24 09:15:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225466065] [2023-08-24 09:15:03,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:15:03,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:15:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:15:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:15:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:15:03,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 09:15:03,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 536 transitions, 8234 flow. Second operand has 17 states, 17 states have (on average 176.8235294117647) internal successors, (3006), 17 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states 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 09:15:03,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:15:03,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 09:15:03,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:15:14,657 INFO L124 PetriNetUnfolderBase]: 35766/54065 cut-off events. [2023-08-24 09:15:14,657 INFO L125 PetriNetUnfolderBase]: For 779776/779776 co-relation queries the response was YES. [2023-08-24 09:15:15,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330089 conditions, 54065 events. 35766/54065 cut-off events. For 779776/779776 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 404251 event pairs, 3446 based on Foata normal form. 2466/56530 useless extension candidates. Maximal degree in co-relation 330002. Up to 11492 conditions per place. [2023-08-24 09:15:15,713 INFO L140 encePairwiseOnDemand]: 409/423 looper letters, 716 selfloop transitions, 373 changer transitions 68/1157 dead transitions. [2023-08-24 09:15:15,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1157 transitions, 16918 flow [2023-08-24 09:15:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:15:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:15:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5394 transitions. [2023-08-24 09:15:15,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397163120567376 [2023-08-24 09:15:15,717 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5394 transitions. [2023-08-24 09:15:15,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5394 transitions. [2023-08-24 09:15:15,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:15:15,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5394 transitions. [2023-08-24 09:15:15,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states 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 09:15:15,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 423.0) internal successors, (12690), 30 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states 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 09:15:15,732 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 423.0) internal successors, (12690), 30 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states 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 09:15:15,732 INFO L175 Difference]: Start difference. First operand has 178 places, 536 transitions, 8234 flow. Second operand 29 states and 5394 transitions. [2023-08-24 09:15:15,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1157 transitions, 16918 flow [2023-08-24 09:15:21,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1157 transitions, 15492 flow, removed 673 selfloop flow, removed 3 redundant places. [2023-08-24 09:15:21,776 INFO L231 Difference]: Finished difference. Result has 228 places, 747 transitions, 11847 flow [2023-08-24 09:15:21,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=7268, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11847, PETRI_PLACES=228, PETRI_TRANSITIONS=747} [2023-08-24 09:15:21,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2023-08-24 09:15:21,777 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 747 transitions, 11847 flow [2023-08-24 09:15:21,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.8235294117647) internal successors, (3006), 17 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states 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 09:15:21,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:15:21,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:15:21,784 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 09:15:21,981 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,SelfDestructingSolverStorable14 [2023-08-24 09:15:21,982 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:15:21,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:15:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2019351973, now seen corresponding path program 2 times [2023-08-24 09:15:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:15:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588538760] [2023-08-24 09:15:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:15:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:22,302 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 09:15:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:15:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588538760] [2023-08-24 09:15:22,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588538760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:15:22,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:15:22,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:15:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282238569] [2023-08-24 09:15:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:15:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:15:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:15:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:15:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:15:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:15:22,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 747 transitions, 11847 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:15:22,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:15:22,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:15:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:15:35,768 INFO L124 PetriNetUnfolderBase]: 41418/62510 cut-off events. [2023-08-24 09:15:35,768 INFO L125 PetriNetUnfolderBase]: For 1900233/1900233 co-relation queries the response was YES. [2023-08-24 09:15:36,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512027 conditions, 62510 events. 41418/62510 cut-off events. For 1900233/1900233 co-relation queries the response was YES. Maximal size of possible extension queue 2586. Compared 469766 event pairs, 6026 based on Foata normal form. 748/63257 useless extension candidates. Maximal degree in co-relation 511915. Up to 21550 conditions per place. [2023-08-24 09:15:36,935 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 805 selfloop transitions, 231 changer transitions 31/1067 dead transitions. [2023-08-24 09:15:36,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1067 transitions, 18641 flow [2023-08-24 09:15:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:15:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:15:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2023-08-24 09:15:36,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2023-08-24 09:15:36,938 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2023-08-24 09:15:36,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2023-08-24 09:15:36,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:15:36,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2023-08-24 09:15:36,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states 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 09:15:36,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states 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 09:15:36,942 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states 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 09:15:36,942 INFO L175 Difference]: Start difference. First operand has 228 places, 747 transitions, 11847 flow. Second operand 9 states and 1782 transitions. [2023-08-24 09:15:36,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1067 transitions, 18641 flow [2023-08-24 09:16:04,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1067 transitions, 16798 flow, removed 724 selfloop flow, removed 4 redundant places. [2023-08-24 09:16:04,590 INFO L231 Difference]: Finished difference. Result has 235 places, 834 transitions, 13138 flow [2023-08-24 09:16:04,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13138, PETRI_PLACES=235, PETRI_TRANSITIONS=834} [2023-08-24 09:16:04,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2023-08-24 09:16:04,590 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 834 transitions, 13138 flow [2023-08-24 09:16:04,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:16:04,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:16:04,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:16:04,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 09:16:04,591 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:16:04,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:16:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash 476228703, now seen corresponding path program 3 times [2023-08-24 09:16:04,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:16:04,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225366215] [2023-08-24 09:16:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:16:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:16:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:16:04,777 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 09:16:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:16:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225366215] [2023-08-24 09:16:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225366215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:16:04,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:16:04,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:16:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074866478] [2023-08-24 09:16:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:16:04,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:16:04,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:16:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:16:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:16:04,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:16:04,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 834 transitions, 13138 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:16:04,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:16:04,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:16:04,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:16:19,034 INFO L124 PetriNetUnfolderBase]: 46618/69272 cut-off events. [2023-08-24 09:16:19,034 INFO L125 PetriNetUnfolderBase]: For 2049712/2049712 co-relation queries the response was YES. [2023-08-24 09:16:20,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558739 conditions, 69272 events. 46618/69272 cut-off events. For 2049712/2049712 co-relation queries the response was YES. Maximal size of possible extension queue 2821. Compared 510131 event pairs, 14474 based on Foata normal form. 504/69775 useless extension candidates. Maximal degree in co-relation 558625. Up to 49541 conditions per place. [2023-08-24 09:16:20,819 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 899 selfloop transitions, 120 changer transitions 42/1061 dead transitions. [2023-08-24 09:16:20,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1061 transitions, 18721 flow [2023-08-24 09:16:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:16:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:16:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1553 transitions. [2023-08-24 09:16:20,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589243498817967 [2023-08-24 09:16:20,820 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1553 transitions. [2023-08-24 09:16:20,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1553 transitions. [2023-08-24 09:16:20,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:16:20,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1553 transitions. [2023-08-24 09:16:20,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.125) internal successors, (1553), 8 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 09:16:20,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:16:20,824 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:16:20,824 INFO L175 Difference]: Start difference. First operand has 235 places, 834 transitions, 13138 flow. Second operand 8 states and 1553 transitions. [2023-08-24 09:16:20,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1061 transitions, 18721 flow [2023-08-24 09:16:39,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1061 transitions, 16996 flow, removed 588 selfloop flow, removed 7 redundant places. [2023-08-24 09:16:39,718 INFO L231 Difference]: Finished difference. Result has 234 places, 765 transitions, 11291 flow [2023-08-24 09:16:39,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=11026, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11291, PETRI_PLACES=234, PETRI_TRANSITIONS=765} [2023-08-24 09:16:39,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2023-08-24 09:16:39,719 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 765 transitions, 11291 flow [2023-08-24 09:16:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 09:16:39,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:16:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:16:39,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 09:16:39,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:16:39,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:16:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1742941011, now seen corresponding path program 4 times [2023-08-24 09:16:39,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:16:39,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475276691] [2023-08-24 09:16:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:16:39,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:16:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:16:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:16:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:16:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475276691] [2023-08-24 09:16:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475276691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:16:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741831522] [2023-08-24 09:16:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:16:39,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:16:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:16:39,989 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 09:16:39,990 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 09:16:40,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:16:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:16:40,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:16:40,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:16:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:16:40,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:16:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:16:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741831522] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:16:40,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:16:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8] total 20 [2023-08-24 09:16:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405709057] [2023-08-24 09:16:40,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:16:40,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 09:16:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:16:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 09:16:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:16:40,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 09:16:40,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 765 transitions, 11291 flow. Second operand has 10 states, 10 states have (on average 175.1) internal successors, (1751), 10 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states 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 09:16:40,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:16:40,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 09:16:40,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:17:03,586 INFO L124 PetriNetUnfolderBase]: 75051/111846 cut-off events. [2023-08-24 09:17:03,587 INFO L125 PetriNetUnfolderBase]: For 2897028/2897028 co-relation queries the response was YES. [2023-08-24 09:17:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866399 conditions, 111846 events. 75051/111846 cut-off events. For 2897028/2897028 co-relation queries the response was YES. Maximal size of possible extension queue 4687. Compared 887665 event pairs, 5813 based on Foata normal form. 132/111977 useless extension candidates. Maximal degree in co-relation 866288. Up to 22541 conditions per place. [2023-08-24 09:17:06,040 INFO L140 encePairwiseOnDemand]: 404/423 looper letters, 1129 selfloop transitions, 807 changer transitions 21/1957 dead transitions. [2023-08-24 09:17:06,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1957 transitions, 30852 flow [2023-08-24 09:17:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:17:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:17:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3967 transitions. [2023-08-24 09:17:06,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465833614769785 [2023-08-24 09:17:06,044 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3967 transitions. [2023-08-24 09:17:06,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3967 transitions. [2023-08-24 09:17:06,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:17:06,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3967 transitions. [2023-08-24 09:17:06,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 188.9047619047619) internal successors, (3967), 21 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states 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 09:17:06,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states 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 09:17:06,052 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states 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 09:17:06,052 INFO L175 Difference]: Start difference. First operand has 234 places, 765 transitions, 11291 flow. Second operand 21 states and 3967 transitions. [2023-08-24 09:17:06,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1957 transitions, 30852 flow [2023-08-24 09:17:37,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1957 transitions, 30204 flow, removed 204 selfloop flow, removed 7 redundant places. [2023-08-24 09:17:37,747 INFO L231 Difference]: Finished difference. Result has 258 places, 1356 transitions, 22178 flow [2023-08-24 09:17:37,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=10992, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=22178, PETRI_PLACES=258, PETRI_TRANSITIONS=1356} [2023-08-24 09:17:37,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2023-08-24 09:17:37,748 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1356 transitions, 22178 flow [2023-08-24 09:17:37,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.1) internal successors, (1751), 10 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states 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 09:17:37,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:17:37,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:17:37,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 09:17:37,953 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,SelfDestructingSolverStorable17 [2023-08-24 09:17:37,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:17:37,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:17:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1920108339, now seen corresponding path program 5 times [2023-08-24 09:17:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:17:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866868520] [2023-08-24 09:17:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:17:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:17:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:17:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:17:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:17:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866868520] [2023-08-24 09:17:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866868520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:17:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:17:38,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:17:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449625187] [2023-08-24 09:17:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:17:38,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:17:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:17:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:17:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:17:38,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 09:17:38,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1356 transitions, 22178 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:17:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:17:38,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 09:17:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:18:07,153 INFO L124 PetriNetUnfolderBase]: 69740/105080 cut-off events. [2023-08-24 09:18:07,153 INFO L125 PetriNetUnfolderBase]: For 3338667/3338667 co-relation queries the response was YES. [2023-08-24 09:18:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876813 conditions, 105080 events. 69740/105080 cut-off events. For 3338667/3338667 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 834596 event pairs, 15827 based on Foata normal form. 5462/110541 useless extension candidates. Maximal degree in co-relation 876689. Up to 33721 conditions per place. [2023-08-24 09:18:09,858 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 1107 selfloop transitions, 626 changer transitions 56/1789 dead transitions. [2023-08-24 09:18:09,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1789 transitions, 32163 flow [2023-08-24 09:18:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:18:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:18:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1548 transitions. [2023-08-24 09:18:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574468085106383 [2023-08-24 09:18:09,859 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1548 transitions. [2023-08-24 09:18:09,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1548 transitions. [2023-08-24 09:18:09,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:18:09,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1548 transitions. [2023-08-24 09:18:09,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 09:18:09,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:18:09,863 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 09:18:09,863 INFO L175 Difference]: Start difference. First operand has 258 places, 1356 transitions, 22178 flow. Second operand 8 states and 1548 transitions. [2023-08-24 09:18:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1789 transitions, 32163 flow [2023-08-24 09:19:01,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1789 transitions, 30007 flow, removed 575 selfloop flow, removed 9 redundant places. [2023-08-24 09:19:01,236 INFO L231 Difference]: Finished difference. Result has 256 places, 1451 transitions, 23692 flow [2023-08-24 09:19:01,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=20053, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23692, PETRI_PLACES=256, PETRI_TRANSITIONS=1451} [2023-08-24 09:19:01,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2023-08-24 09:19:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 1451 transitions, 23692 flow [2023-08-24 09:19:01,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 09:19:01,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:19:01,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:19:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 09:19:01,238 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:19:01,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:19:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1536057061, now seen corresponding path program 6 times [2023-08-24 09:19:01,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:19:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080984913] [2023-08-24 09:19:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:19:01,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:19:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:19:01,409 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 09:19:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:19:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080984913] [2023-08-24 09:19:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080984913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:19:01,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:19:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:19:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676272316] [2023-08-24 09:19:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:19:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:19:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:19:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:19:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:19:01,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 09:19:01,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 1451 transitions, 23692 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 09:19:01,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:19:01,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 09:19:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand