/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-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:38:30,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:38:31,063 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 09:38:31,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:38:31,068 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:38:31,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:38:31,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:38:31,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:38:31,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:38:31,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:38:31,107 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:38:31,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:38:31,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:38:31,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:38:31,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:38:31,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:38:31,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:38:31,110 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:38:31,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:38:31,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:38:31,111 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:38:31,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:38:31,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:38:31,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:38:31,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:38:31,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:38:31,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:38:31,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:38:31,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:38:31,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:38:31,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:38:31,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:38:31,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:38:31,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:38:31,416 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:38:31,417 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:38:31,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-24 09:38:32,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:38:32,801 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:38:32,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-24 09:38:32,807 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45e75014/5e28eef34973405a9200964f2793ae1e/FLAG88ce4937e [2023-08-24 09:38:32,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45e75014/5e28eef34973405a9200964f2793ae1e [2023-08-24 09:38:32,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:38:32,825 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:38:32,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:38:32,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:38:32,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:38:32,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:38:32" (1/1) ... [2023-08-24 09:38:32,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e8d308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:32, skipping insertion in model container [2023-08-24 09:38:32,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:38:32" (1/1) ... [2023-08-24 09:38:32,850 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:38:33,032 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-queue-add-3-nl.wvr.c[3615,3628] [2023-08-24 09:38:33,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:38:33,045 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:38:33,064 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-queue-add-3-nl.wvr.c[3615,3628] [2023-08-24 09:38:33,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:38:33,077 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:38:33,077 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:38:33,083 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:38:33,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33 WrapperNode [2023-08-24 09:38:33,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:38:33,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:38:33,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:38:33,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:38:33,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,125 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 268 [2023-08-24 09:38:33,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:38:33,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:38:33,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:38:33,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:38:33,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:38:33,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:38:33,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:38:33,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:38:33,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (1/1) ... [2023-08-24 09:38:33,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:38:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:33,201 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 09:38:33,224 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 09:38:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:38:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:38:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:38:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:38:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:38:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:38:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:38:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:38:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:38:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:38:33,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:38:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:38:33,260 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 09:38:33,379 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:38:33,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:38:33,726 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:38:33,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:38:33,831 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 09:38:33,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:38:33 BoogieIcfgContainer [2023-08-24 09:38:33,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:38:33,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:38:33,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:38:33,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:38:33,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:38:32" (1/3) ... [2023-08-24 09:38:33,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cae577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:38:33, skipping insertion in model container [2023-08-24 09:38:33,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:38:33" (2/3) ... [2023-08-24 09:38:33,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cae577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:38:33, skipping insertion in model container [2023-08-24 09:38:33,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:38:33" (3/3) ... [2023-08-24 09:38:33,839 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-24 09:38:33,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:38:33,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:38:33,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:38:33,937 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:38:33,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 458 flow [2023-08-24 09:38:34,072 INFO L124 PetriNetUnfolderBase]: 18/214 cut-off events. [2023-08-24 09:38:34,073 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:38:34,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 214 events. 18/214 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 133 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 176. Up to 3 conditions per place. [2023-08-24 09:38:34,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 217 transitions, 458 flow [2023-08-24 09:38:34,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 204 transitions, 426 flow [2023-08-24 09:38:34,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:38:34,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 204 transitions, 426 flow [2023-08-24 09:38:34,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 204 transitions, 426 flow [2023-08-24 09:38:34,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 204 transitions, 426 flow [2023-08-24 09:38:34,149 INFO L124 PetriNetUnfolderBase]: 18/204 cut-off events. [2023-08-24 09:38:34,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:38:34,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 204 events. 18/204 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 131 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 176. Up to 3 conditions per place. [2023-08-24 09:38:34,152 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-24 09:38:41,173 INFO L134 LiptonReduction]: Checked pairs total: 2787 [2023-08-24 09:38:41,174 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-24 09:38:41,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:38:41,190 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;@87f3fb5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:38:41,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:38:41,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:38:41,197 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 09:38:41,197 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:38:41,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:41,198 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] [2023-08-24 09:38:41,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:41,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 790008732, now seen corresponding path program 1 times [2023-08-24 09:38:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88993763] [2023-08-24 09:38:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:41,439 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 09:38:41,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:41,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88993763] [2023-08-24 09:38:41,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88993763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:41,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:41,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:38:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267261600] [2023-08-24 09:38:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 09:38:41,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 09:38:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 09:38:41,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 433 [2023-08-24 09:38:41,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:41,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 433 [2023-08-24 09:38:41,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:41,607 INFO L124 PetriNetUnfolderBase]: 323/460 cut-off events. [2023-08-24 09:38:41,607 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-24 09:38:41,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1338 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-08-24 09:38:41,611 INFO L140 encePairwiseOnDemand]: 432/433 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-24 09:38:41,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-08-24 09:38:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 09:38:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 09:38:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 411 transitions. [2023-08-24 09:38:41,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745958429561201 [2023-08-24 09:38:41,624 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 411 transitions. [2023-08-24 09:38:41,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 411 transitions. [2023-08-24 09:38:41,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:41,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 411 transitions. [2023-08-24 09:38:41,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,636 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,637 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 411 transitions. [2023-08-24 09:38:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-08-24 09:38:41,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:38:41,643 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-24 09:38:41,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 09:38:41,647 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-24 09:38:41,647 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-24 09:38:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:41,648 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] [2023-08-24 09:38:41,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:38:41,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:41,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1996347239, now seen corresponding path program 1 times [2023-08-24 09:38:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:41,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313443821] [2023-08-24 09:38:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:42,023 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 09:38:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313443821] [2023-08-24 09:38:42,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313443821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:42,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:42,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 09:38:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567678684] [2023-08-24 09:38:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:42,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:38:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:38:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:38:42,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 433 [2023-08-24 09:38:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 433 [2023-08-24 09:38:42,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:42,203 INFO L124 PetriNetUnfolderBase]: 339/498 cut-off events. [2023-08-24 09:38:42,204 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-24 09:38:42,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 498 events. 339/498 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1525 event pairs, 201 based on Foata normal form. 26/385 useless extension candidates. Maximal degree in co-relation 1014. Up to 460 conditions per place. [2023-08-24 09:38:42,208 INFO L140 encePairwiseOnDemand]: 427/433 looper letters, 25 selfloop transitions, 2 changer transitions 13/41 dead transitions. [2023-08-24 09:38:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2023-08-24 09:38:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:38:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:38:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 703 transitions. [2023-08-24 09:38:42,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058891454965358 [2023-08-24 09:38:42,215 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 703 transitions. [2023-08-24 09:38:42,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 703 transitions. [2023-08-24 09:38:42,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:42,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 703 transitions. [2023-08-24 09:38:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,222 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 703 transitions. [2023-08-24 09:38:42,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2023-08-24 09:38:42,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 09:38:42,224 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-08-24 09:38:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-24 09:38:42,225 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-24 09:38:42,226 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-08-24 09:38:42,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:42,233 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] [2023-08-24 09:38:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:38:42,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:42,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 863825311, now seen corresponding path program 1 times [2023-08-24 09:38:42,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:42,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066390852] [2023-08-24 09:38:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:42,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066390852] [2023-08-24 09:38:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066390852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:42,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:42,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:38:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512462446] [2023-08-24 09:38:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:42,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:38:42,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:38:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:38:42,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 433 [2023-08-24 09:38:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:42,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 433 [2023-08-24 09:38:42,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:42,542 INFO L124 PetriNetUnfolderBase]: 452/664 cut-off events. [2023-08-24 09:38:42,542 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-24 09:38:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 664 events. 452/664 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2347 event pairs, 280 based on Foata normal form. 46/537 useless extension candidates. Maximal degree in co-relation 1624. Up to 461 conditions per place. [2023-08-24 09:38:42,545 INFO L140 encePairwiseOnDemand]: 426/433 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-08-24 09:38:42,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 202 flow [2023-08-24 09:38:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:38:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:38:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2023-08-24 09:38:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40704387990762125 [2023-08-24 09:38:42,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2023-08-24 09:38:42,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2023-08-24 09:38:42,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:42,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2023-08-24 09:38:42,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 09:38:42,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,554 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 705 transitions. [2023-08-24 09:38:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 202 flow [2023-08-24 09:38:42,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:38:42,555 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-08-24 09:38:42,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-24 09:38:42,556 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 09:38:42,556 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-08-24 09:38:42,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:42,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:42,557 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] [2023-08-24 09:38:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:38:42,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:42,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 167495755, now seen corresponding path program 1 times [2023-08-24 09:38:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:42,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089596217] [2023-08-24 09:38:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089596217] [2023-08-24 09:38:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089596217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:43,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 09:38:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146933197] [2023-08-24 09:38:43,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:43,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 09:38:43,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 09:38:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:38:43,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 433 [2023-08-24 09:38:43,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:43,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:43,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 433 [2023-08-24 09:38:43,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:43,962 INFO L124 PetriNetUnfolderBase]: 565/811 cut-off events. [2023-08-24 09:38:43,963 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-08-24 09:38:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 811 events. 565/811 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2613 event pairs, 15 based on Foata normal form. 1/609 useless extension candidates. Maximal degree in co-relation 2124. Up to 572 conditions per place. [2023-08-24 09:38:43,968 INFO L140 encePairwiseOnDemand]: 422/433 looper letters, 67 selfloop transitions, 28 changer transitions 3/98 dead transitions. [2023-08-24 09:38:43,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 98 transitions, 501 flow [2023-08-24 09:38:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:38:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:38:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2023-08-24 09:38:43,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41750064151911725 [2023-08-24 09:38:43,973 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2023-08-24 09:38:43,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2023-08-24 09:38:43,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:43,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2023-08-24 09:38:43,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:43,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:43,984 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:43,985 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1627 transitions. [2023-08-24 09:38:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 98 transitions, 501 flow [2023-08-24 09:38:43,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 98 transitions, 497 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:38:43,988 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 286 flow [2023-08-24 09:38:43,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=286, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-08-24 09:38:43,989 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-08-24 09:38:43,989 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 286 flow [2023-08-24 09:38:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:43,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:43,990 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] [2023-08-24 09:38:43,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 09:38:43,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:43,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1283745355, now seen corresponding path program 2 times [2023-08-24 09:38:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782604066] [2023-08-24 09:38:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:44,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:44,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782604066] [2023-08-24 09:38:44,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782604066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:44,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:44,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:38:44,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739574671] [2023-08-24 09:38:44,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:44,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:38:44,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:38:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:38:44,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 433 [2023-08-24 09:38:44,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:44,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:44,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 433 [2023-08-24 09:38:44,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:44,284 INFO L124 PetriNetUnfolderBase]: 456/665 cut-off events. [2023-08-24 09:38:44,285 INFO L125 PetriNetUnfolderBase]: For 474/487 co-relation queries the response was YES. [2023-08-24 09:38:44,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 665 events. 456/665 cut-off events. For 474/487 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1987 event pairs, 93 based on Foata normal form. 27/540 useless extension candidates. Maximal degree in co-relation 2272. Up to 581 conditions per place. [2023-08-24 09:38:44,290 INFO L140 encePairwiseOnDemand]: 429/433 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-24 09:38:44,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 420 flow [2023-08-24 09:38:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:38:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:38:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-08-24 09:38:44,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565050038491147 [2023-08-24 09:38:44,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-08-24 09:38:44,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-08-24 09:38:44,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:44,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-08-24 09:38:44,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:44,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:44,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:44,296 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 286 flow. Second operand 3 states and 593 transitions. [2023-08-24 09:38:44,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 420 flow [2023-08-24 09:38:44,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 360 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-24 09:38:44,301 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 235 flow [2023-08-24 09:38:44,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-08-24 09:38:44,302 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-08-24 09:38:44,302 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 235 flow [2023-08-24 09:38:44,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:44,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:44,302 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] [2023-08-24 09:38:44,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 09:38:44,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:44,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1753967349, now seen corresponding path program 3 times [2023-08-24 09:38:44,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:44,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118124101] [2023-08-24 09:38:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:45,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118124101] [2023-08-24 09:38:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118124101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:45,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 09:38:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636295704] [2023-08-24 09:38:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 09:38:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 09:38:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:38:45,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 433 [2023-08-24 09:38:45,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 235 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:45,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 433 [2023-08-24 09:38:45,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:45,503 INFO L124 PetriNetUnfolderBase]: 575/842 cut-off events. [2023-08-24 09:38:45,503 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-24 09:38:45,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2741 conditions, 842 events. 575/842 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2709 event pairs, 71 based on Foata normal form. 1/661 useless extension candidates. Maximal degree in co-relation 2728. Up to 703 conditions per place. [2023-08-24 09:38:45,509 INFO L140 encePairwiseOnDemand]: 422/433 looper letters, 74 selfloop transitions, 24 changer transitions 3/101 dead transitions. [2023-08-24 09:38:45,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 101 transitions, 600 flow [2023-08-24 09:38:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:38:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:38:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1613 transitions. [2023-08-24 09:38:45,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413908134462407 [2023-08-24 09:38:45,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1613 transitions. [2023-08-24 09:38:45,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1613 transitions. [2023-08-24 09:38:45,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:45,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1613 transitions. [2023-08-24 09:38:45,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.22222222222223) internal successors, (1613), 9 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,523 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,523 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 235 flow. Second operand 9 states and 1613 transitions. [2023-08-24 09:38:45,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 101 transitions, 600 flow [2023-08-24 09:38:45,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 573 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-24 09:38:45,528 INFO L231 Difference]: Finished difference. Result has 56 places, 68 transitions, 375 flow [2023-08-24 09:38:45,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=375, PETRI_PLACES=56, PETRI_TRANSITIONS=68} [2023-08-24 09:38:45,529 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2023-08-24 09:38:45,529 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 68 transitions, 375 flow [2023-08-24 09:38:45,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:45,530 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] [2023-08-24 09:38:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 09:38:45,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:45,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1926398911, now seen corresponding path program 4 times [2023-08-24 09:38:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977310916] [2023-08-24 09:38:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:45,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:45,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977310916] [2023-08-24 09:38:45,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977310916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:45,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:45,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:38:45,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470952395] [2023-08-24 09:38:45,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:45,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:38:45,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:38:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:38:45,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 433 [2023-08-24 09:38:45,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:45,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 433 [2023-08-24 09:38:45,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:45,767 INFO L124 PetriNetUnfolderBase]: 479/745 cut-off events. [2023-08-24 09:38:45,767 INFO L125 PetriNetUnfolderBase]: For 751/761 co-relation queries the response was YES. [2023-08-24 09:38:45,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 745 events. 479/745 cut-off events. For 751/761 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2629 event pairs, 157 based on Foata normal form. 88/695 useless extension candidates. Maximal degree in co-relation 2466. Up to 449 conditions per place. [2023-08-24 09:38:45,773 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 54 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-08-24 09:38:45,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 447 flow [2023-08-24 09:38:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:38:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:38:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-24 09:38:45,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46420323325635104 [2023-08-24 09:38:45,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-24 09:38:45,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-24 09:38:45,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:45,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-24 09:38:45,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,779 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 375 flow. Second operand 3 states and 603 transitions. [2023-08-24 09:38:45,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 447 flow [2023-08-24 09:38:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 408 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-24 09:38:45,783 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 287 flow [2023-08-24 09:38:45,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-24 09:38:45,784 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-08-24 09:38:45,784 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 287 flow [2023-08-24 09:38:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:45,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:45,785 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] [2023-08-24 09:38:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 09:38:45,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:38:45,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 115801611, now seen corresponding path program 5 times [2023-08-24 09:38:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527521857] [2023-08-24 09:38:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:46,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:46,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527521857] [2023-08-24 09:38:46,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527521857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:46,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 09:38:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106740639] [2023-08-24 09:38:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 09:38:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:46,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 09:38:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:38:46,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 433 [2023-08-24 09:38:46,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 287 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:46,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 433 [2023-08-24 09:38:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:46,811 INFO L124 PetriNetUnfolderBase]: 541/847 cut-off events. [2023-08-24 09:38:46,811 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2023-08-24 09:38:46,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2956 conditions, 847 events. 541/847 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3053 event pairs, 129 based on Foata normal form. 1/689 useless extension candidates. Maximal degree in co-relation 2940. Up to 708 conditions per place. [2023-08-24 09:38:46,817 INFO L140 encePairwiseOnDemand]: 422/433 looper letters, 73 selfloop transitions, 19 changer transitions 3/95 dead transitions. [2023-08-24 09:38:46,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 638 flow [2023-08-24 09:38:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:38:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:38:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1602 transitions. [2023-08-24 09:38:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110854503464203 [2023-08-24 09:38:46,822 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1602 transitions. [2023-08-24 09:38:46,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1602 transitions. [2023-08-24 09:38:46,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:46,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1602 transitions. [2023-08-24 09:38:46,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,831 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,832 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 287 flow. Second operand 9 states and 1602 transitions. [2023-08-24 09:38:46,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 638 flow [2023-08-24 09:38:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:38:46,837 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 445 flow [2023-08-24 09:38:46,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2023-08-24 09:38:46,838 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-08-24 09:38:46,838 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 445 flow [2023-08-24 09:38:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:46,839 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] [2023-08-24 09:38:46,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 09:38:46,839 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 1 more)] === [2023-08-24 09:38:46,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1684018237, now seen corresponding path program 6 times [2023-08-24 09:38:46,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:46,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650273435] [2023-08-24 09:38:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:47,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650273435] [2023-08-24 09:38:47,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650273435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:47,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:38:47,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 09:38:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731079237] [2023-08-24 09:38:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 09:38:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 09:38:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:38:47,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 433 [2023-08-24 09:38:47,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 445 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:47,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:47,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 433 [2023-08-24 09:38:47,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:47,983 INFO L124 PetriNetUnfolderBase]: 616/971 cut-off events. [2023-08-24 09:38:47,983 INFO L125 PetriNetUnfolderBase]: For 1423/1423 co-relation queries the response was YES. [2023-08-24 09:38:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3763 conditions, 971 events. 616/971 cut-off events. For 1423/1423 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3781 event pairs, 77 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3742. Up to 633 conditions per place. [2023-08-24 09:38:47,991 INFO L140 encePairwiseOnDemand]: 422/433 looper letters, 76 selfloop transitions, 39 changer transitions 3/118 dead transitions. [2023-08-24 09:38:47,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 876 flow [2023-08-24 09:38:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:38:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:38:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1618 transitions. [2023-08-24 09:38:47,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151911726969464 [2023-08-24 09:38:47,995 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1618 transitions. [2023-08-24 09:38:47,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1618 transitions. [2023-08-24 09:38:47,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:47,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1618 transitions. [2023-08-24 09:38:47,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.77777777777777) internal successors, (1618), 9 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,005 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,005 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 445 flow. Second operand 9 states and 1618 transitions. [2023-08-24 09:38:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 876 flow [2023-08-24 09:38:48,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 118 transitions, 830 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-24 09:38:48,017 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 608 flow [2023-08-24 09:38:48,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=608, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-24 09:38:48,018 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-08-24 09:38:48,019 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 608 flow [2023-08-24 09:38:48,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:48,019 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] [2023-08-24 09:38:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 09:38:48,020 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 1 more)] === [2023-08-24 09:38:48,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1310964555, now seen corresponding path program 1 times [2023-08-24 09:38:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072574475] [2023-08-24 09:38:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:48,159 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 09:38:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072574475] [2023-08-24 09:38:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072574475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073906822] [2023-08-24 09:38:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:48,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:48,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:48,163 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 09:38:48,188 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 09:38:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:48,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:38:48,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:48,408 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 09:38:48,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:38:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073906822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:38:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:38:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-08-24 09:38:48,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910754294] [2023-08-24 09:38:48,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:38:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:38:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:38:48,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 433 [2023-08-24 09:38:48,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:48,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 433 [2023-08-24 09:38:48,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:48,637 INFO L124 PetriNetUnfolderBase]: 804/1264 cut-off events. [2023-08-24 09:38:48,638 INFO L125 PetriNetUnfolderBase]: For 3198/3206 co-relation queries the response was YES. [2023-08-24 09:38:48,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5460 conditions, 1264 events. 804/1264 cut-off events. For 3198/3206 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5273 event pairs, 213 based on Foata normal form. 20/1030 useless extension candidates. Maximal degree in co-relation 5435. Up to 576 conditions per place. [2023-08-24 09:38:48,647 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-08-24 09:38:48,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 996 flow [2023-08-24 09:38:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:38:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:38:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 812 transitions. [2023-08-24 09:38:48,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46882217090069284 [2023-08-24 09:38:48,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 812 transitions. [2023-08-24 09:38:48,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 812 transitions. [2023-08-24 09:38:48,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:48,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 812 transitions. [2023-08-24 09:38:48,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,655 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 608 flow. Second operand 4 states and 812 transitions. [2023-08-24 09:38:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 996 flow [2023-08-24 09:38:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 912 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-08-24 09:38:48,671 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 704 flow [2023-08-24 09:38:48,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=704, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2023-08-24 09:38:48,672 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-08-24 09:38:48,672 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 704 flow [2023-08-24 09:38:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:48,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:48,673 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] [2023-08-24 09:38:48,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 09:38:48,880 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 09:38:48,880 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 1 more)] === [2023-08-24 09:38:48,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 312437159, now seen corresponding path program 1 times [2023-08-24 09:38:48,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:48,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211162805] [2023-08-24 09:38:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:49,028 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 09:38:49,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211162805] [2023-08-24 09:38:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211162805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229167083] [2023-08-24 09:38:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:49,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:49,030 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 09:38:49,049 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 09:38:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:49,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:38:49,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:49,229 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 09:38:49,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:49,295 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 09:38:49,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229167083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:49,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 09:38:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086113089] [2023-08-24 09:38:49,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:38:49,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:38:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:38:49,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 433 [2023-08-24 09:38:49,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 166.5) internal successors, (1998), 12 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:49,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 433 [2023-08-24 09:38:49,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:49,715 INFO L124 PetriNetUnfolderBase]: 1246/1993 cut-off events. [2023-08-24 09:38:49,715 INFO L125 PetriNetUnfolderBase]: For 6203/6219 co-relation queries the response was YES. [2023-08-24 09:38:49,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9780 conditions, 1993 events. 1246/1993 cut-off events. For 6203/6219 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9245 event pairs, 570 based on Foata normal form. 80/1703 useless extension candidates. Maximal degree in co-relation 9752. Up to 1138 conditions per place. [2023-08-24 09:38:49,730 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-08-24 09:38:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 156 transitions, 1693 flow [2023-08-24 09:38:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:38:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:38:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-08-24 09:38:49,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39992301770592764 [2023-08-24 09:38:49,733 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-08-24 09:38:49,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-08-24 09:38:49,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:49,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-08-24 09:38:49,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:49,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 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 09:38:49,739 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 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 09:38:49,739 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 704 flow. Second operand 6 states and 1039 transitions. [2023-08-24 09:38:49,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 156 transitions, 1693 flow [2023-08-24 09:38:49,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1589 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-24 09:38:49,781 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 739 flow [2023-08-24 09:38:49,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-08-24 09:38:49,781 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-08-24 09:38:49,781 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 739 flow [2023-08-24 09:38:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.5) internal successors, (1998), 12 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:49,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:49,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 09:38:49,788 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 09:38:49,988 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,SelfDestructingSolverStorable10 [2023-08-24 09:38:49,989 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 1 more)] === [2023-08-24 09:38:49,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2051757585, now seen corresponding path program 1 times [2023-08-24 09:38:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111155907] [2023-08-24 09:38:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111155907] [2023-08-24 09:38:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111155907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690163905] [2023-08-24 09:38:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:50,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:50,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:50,141 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 09:38:50,144 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 09:38:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:50,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:38:50,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:50,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:50,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690163905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:50,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:50,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 09:38:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719483981] [2023-08-24 09:38:50,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:38:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:50,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:38:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:38:50,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 433 [2023-08-24 09:38:50,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 739 flow. Second operand has 12 states, 12 states have (on average 166.25) internal successors, (1995), 12 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:50,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:50,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 433 [2023-08-24 09:38:50,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:50,993 INFO L124 PetriNetUnfolderBase]: 1736/2867 cut-off events. [2023-08-24 09:38:50,993 INFO L125 PetriNetUnfolderBase]: For 7887/7919 co-relation queries the response was YES. [2023-08-24 09:38:51,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12774 conditions, 2867 events. 1736/2867 cut-off events. For 7887/7919 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15175 event pairs, 895 based on Foata normal form. 108/2548 useless extension candidates. Maximal degree in co-relation 12746. Up to 1792 conditions per place. [2023-08-24 09:38:51,020 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2023-08-24 09:38:51,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1459 flow [2023-08-24 09:38:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:38:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:38:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-08-24 09:38:51,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39992301770592764 [2023-08-24 09:38:51,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-08-24 09:38:51,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-08-24 09:38:51,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:51,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-08-24 09:38:51,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:51,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 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 09:38:51,030 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 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 09:38:51,030 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 739 flow. Second operand 6 states and 1039 transitions. [2023-08-24 09:38:51,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1459 flow [2023-08-24 09:38:51,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1431 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-24 09:38:51,067 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 822 flow [2023-08-24 09:38:51,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=822, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-08-24 09:38:51,069 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-08-24 09:38:51,069 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 822 flow [2023-08-24 09:38:51,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.25) internal successors, (1995), 12 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:51,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:51,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 09:38:51,078 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 09:38:51,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:51,276 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 1 more)] === [2023-08-24 09:38:51,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash -435180203, now seen corresponding path program 2 times [2023-08-24 09:38:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:51,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126843225] [2023-08-24 09:38:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126843225] [2023-08-24 09:38:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126843225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068075052] [2023-08-24 09:38:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:38:51,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:51,993 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 09:38:52,016 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 09:38:52,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:38:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:52,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 09:38:52,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:38:52,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:38:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:38:52,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:38:52,661 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 09:38:52,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 09:38:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:52,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:52,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:38:52,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-08-24 09:38:52,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-08-24 09:38:52,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-08-24 09:38:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068075052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:53,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:53,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 09:38:53,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278582890] [2023-08-24 09:38:53,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:53,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:38:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:53,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:38:53,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:38:53,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 433 [2023-08-24 09:38:53,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 822 flow. Second operand has 27 states, 27 states have (on average 138.25925925925927) internal successors, (3733), 27 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:53,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:53,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 433 [2023-08-24 09:38:53,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:56,358 INFO L124 PetriNetUnfolderBase]: 4551/7125 cut-off events. [2023-08-24 09:38:56,359 INFO L125 PetriNetUnfolderBase]: For 23008/23080 co-relation queries the response was YES. [2023-08-24 09:38:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30572 conditions, 7125 events. 4551/7125 cut-off events. For 23008/23080 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 41185 event pairs, 803 based on Foata normal form. 54/5847 useless extension candidates. Maximal degree in co-relation 30542. Up to 2421 conditions per place. [2023-08-24 09:38:56,400 INFO L140 encePairwiseOnDemand]: 421/433 looper letters, 315 selfloop transitions, 104 changer transitions 1/422 dead transitions. [2023-08-24 09:38:56,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 422 transitions, 4209 flow [2023-08-24 09:38:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 09:38:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 09:38:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3784 transitions. [2023-08-24 09:38:56,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361165393497957 [2023-08-24 09:38:56,410 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3784 transitions. [2023-08-24 09:38:56,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3784 transitions. [2023-08-24 09:38:56,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:56,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3784 transitions. [2023-08-24 09:38:56,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 145.53846153846155) internal successors, (3784), 26 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:56,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 433.0) internal successors, (11691), 27 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:56,432 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 433.0) internal successors, (11691), 27 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:56,432 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 822 flow. Second operand 26 states and 3784 transitions. [2023-08-24 09:38:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 422 transitions, 4209 flow [2023-08-24 09:38:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 422 transitions, 4045 flow, removed 70 selfloop flow, removed 3 redundant places. [2023-08-24 09:38:56,516 INFO L231 Difference]: Finished difference. Result has 122 places, 185 transitions, 2086 flow [2023-08-24 09:38:56,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2086, PETRI_PLACES=122, PETRI_TRANSITIONS=185} [2023-08-24 09:38:56,517 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-08-24 09:38:56,517 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 185 transitions, 2086 flow [2023-08-24 09:38:56,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.25925925925927) internal successors, (3733), 27 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:56,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:56,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 09:38:56,528 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 09:38:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:56,724 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 1 more)] === [2023-08-24 09:38:56,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1228296327, now seen corresponding path program 3 times [2023-08-24 09:38:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598164681] [2023-08-24 09:38:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:57,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598164681] [2023-08-24 09:38:57,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598164681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:57,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279091857] [2023-08-24 09:38:57,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:38:57,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:57,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:57,256 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 09:38:57,278 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 09:38:57,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:38:57,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:57,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 09:38:57,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:57,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:57,690 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 09:38:57,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-24 09:38:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:38:57,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279091857] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:57,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:38:57,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 14 [2023-08-24 09:38:57,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231276782] [2023-08-24 09:38:57,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:38:57,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:38:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:38:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:38:57,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 433 [2023-08-24 09:38:57,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 185 transitions, 2086 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:57,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:57,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 433 [2023-08-24 09:38:57,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:59,163 INFO L124 PetriNetUnfolderBase]: 5298/8244 cut-off events. [2023-08-24 09:38:59,164 INFO L125 PetriNetUnfolderBase]: For 59153/59221 co-relation queries the response was YES. [2023-08-24 09:38:59,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43826 conditions, 8244 events. 5298/8244 cut-off events. For 59153/59221 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 47867 event pairs, 1212 based on Foata normal form. 108/7782 useless extension candidates. Maximal degree in co-relation 43782. Up to 4966 conditions per place. [2023-08-24 09:38:59,230 INFO L140 encePairwiseOnDemand]: 425/433 looper letters, 152 selfloop transitions, 94 changer transitions 0/248 dead transitions. [2023-08-24 09:38:59,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 248 transitions, 3077 flow [2023-08-24 09:38:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:38:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:38:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-08-24 09:38:59,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42494226327944573 [2023-08-24 09:38:59,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-08-24 09:38:59,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-08-24 09:38:59,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:59,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-08-24 09:38:59,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:59,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 433.0) internal successors, (2598), 6 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:59,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 433.0) internal successors, (2598), 6 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:59,238 INFO L175 Difference]: Start difference. First operand has 122 places, 185 transitions, 2086 flow. Second operand 5 states and 920 transitions. [2023-08-24 09:38:59,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 248 transitions, 3077 flow [2023-08-24 09:38:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 248 transitions, 2899 flow, removed 84 selfloop flow, removed 4 redundant places. [2023-08-24 09:38:59,456 INFO L231 Difference]: Finished difference. Result has 125 places, 197 transitions, 2451 flow [2023-08-24 09:38:59,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2451, PETRI_PLACES=125, PETRI_TRANSITIONS=197} [2023-08-24 09:38:59,457 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2023-08-24 09:38:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 197 transitions, 2451 flow [2023-08-24 09:38:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:59,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:59,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 09:38:59,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 09:38:59,663 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,SelfDestructingSolverStorable13 [2023-08-24 09:38:59,664 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 1 more)] === [2023-08-24 09:38:59,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1234251943, now seen corresponding path program 4 times [2023-08-24 09:38:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:59,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798482495] [2023-08-24 09:38:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798482495] [2023-08-24 09:39:00,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798482495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931927753] [2023-08-24 09:39:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:39:00,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:00,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:00,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:00,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 09:39:00,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:39:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:00,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:39:00,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:00,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:39:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:00,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:00,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:39:00,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-24 09:39:00,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 09:39:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:00,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931927753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:00,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:00,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-08-24 09:39:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189358174] [2023-08-24 09:39:00,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:39:00,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:39:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:39:00,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 433 [2023-08-24 09:39:00,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 197 transitions, 2451 flow. Second operand has 20 states, 20 states have (on average 132.1) internal successors, (2642), 20 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:00,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:00,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 433 [2023-08-24 09:39:00,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:02,600 INFO L124 PetriNetUnfolderBase]: 6379/9949 cut-off events. [2023-08-24 09:39:02,600 INFO L125 PetriNetUnfolderBase]: For 85444/85444 co-relation queries the response was YES. [2023-08-24 09:39:02,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54679 conditions, 9949 events. 6379/9949 cut-off events. For 85444/85444 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 60339 event pairs, 1428 based on Foata normal form. 94/9689 useless extension candidates. Maximal degree in co-relation 54634. Up to 4792 conditions per place. [2023-08-24 09:39:02,669 INFO L140 encePairwiseOnDemand]: 421/433 looper letters, 210 selfloop transitions, 126 changer transitions 0/336 dead transitions. [2023-08-24 09:39:02,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 336 transitions, 4268 flow [2023-08-24 09:39:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:39:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:39:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2070 transitions. [2023-08-24 09:39:02,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187066974595843 [2023-08-24 09:39:02,675 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2070 transitions. [2023-08-24 09:39:02,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2070 transitions. [2023-08-24 09:39:02,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:02,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2070 transitions. [2023-08-24 09:39:02,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 138.0) internal successors, (2070), 15 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:02,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 433.0) internal successors, (6928), 16 states have internal predecessors, (6928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:02,686 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 433.0) internal successors, (6928), 16 states have internal predecessors, (6928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:02,686 INFO L175 Difference]: Start difference. First operand has 125 places, 197 transitions, 2451 flow. Second operand 15 states and 2070 transitions. [2023-08-24 09:39:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 336 transitions, 4268 flow [2023-08-24 09:39:03,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 336 transitions, 4239 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 09:39:03,192 INFO L231 Difference]: Finished difference. Result has 146 places, 224 transitions, 3208 flow [2023-08-24 09:39:03,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3208, PETRI_PLACES=146, PETRI_TRANSITIONS=224} [2023-08-24 09:39:03,192 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 114 predicate places. [2023-08-24 09:39:03,192 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 224 transitions, 3208 flow [2023-08-24 09:39:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 132.1) internal successors, (2642), 20 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:03,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:03,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 09:39:03,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 09:39:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 09:39:03,399 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 1 more)] === [2023-08-24 09:39:03,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 770210509, now seen corresponding path program 5 times [2023-08-24 09:39:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655152195] [2023-08-24 09:39:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655152195] [2023-08-24 09:39:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655152195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048025832] [2023-08-24 09:39:04,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:39:04,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:04,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 09:39:04,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:39:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:04,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 09:39:04,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:04,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 09:39:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:04,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 09:39:04,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-24 09:39:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:04,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:04,769 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:39:04,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2023-08-24 09:39:04,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2023-08-24 09:39:04,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-08-24 09:39:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:05,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048025832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:05,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:05,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 09:39:05,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067703710] [2023-08-24 09:39:05,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:39:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:39:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=639, Unknown=4, NotChecked=0, Total=756 [2023-08-24 09:39:05,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 433 [2023-08-24 09:39:05,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 224 transitions, 3208 flow. Second operand has 28 states, 28 states have (on average 138.07142857142858) internal successors, (3866), 28 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:05,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:05,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 433 [2023-08-24 09:39:05,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:10,264 INFO L124 PetriNetUnfolderBase]: 11924/18606 cut-off events. [2023-08-24 09:39:10,264 INFO L125 PetriNetUnfolderBase]: For 212279/212343 co-relation queries the response was YES. [2023-08-24 09:39:10,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111377 conditions, 18606 events. 11924/18606 cut-off events. For 212279/212343 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 123144 event pairs, 1542 based on Foata normal form. 382/18168 useless extension candidates. Maximal degree in co-relation 111324. Up to 5361 conditions per place. [2023-08-24 09:39:10,393 INFO L140 encePairwiseOnDemand]: 416/433 looper letters, 510 selfloop transitions, 245 changer transitions 7/766 dead transitions. [2023-08-24 09:39:10,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 766 transitions, 10271 flow [2023-08-24 09:39:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 09:39:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 09:39:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5410 transitions. [2023-08-24 09:39:10,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376817926471506 [2023-08-24 09:39:10,402 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5410 transitions. [2023-08-24 09:39:10,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5410 transitions. [2023-08-24 09:39:10,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:10,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5410 transitions. [2023-08-24 09:39:10,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 146.21621621621622) internal successors, (5410), 37 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:10,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 433.0) internal successors, (16454), 38 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:10,433 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 433.0) internal successors, (16454), 38 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:10,433 INFO L175 Difference]: Start difference. First operand has 146 places, 224 transitions, 3208 flow. Second operand 37 states and 5410 transitions. [2023-08-24 09:39:10,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 766 transitions, 10271 flow [2023-08-24 09:39:11,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 766 transitions, 10197 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-08-24 09:39:11,158 INFO L231 Difference]: Finished difference. Result has 199 places, 389 transitions, 6917 flow [2023-08-24 09:39:11,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=3167, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6917, PETRI_PLACES=199, PETRI_TRANSITIONS=389} [2023-08-24 09:39:11,159 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 167 predicate places. [2023-08-24 09:39:11,159 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 389 transitions, 6917 flow [2023-08-24 09:39:11,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 138.07142857142858) internal successors, (3866), 28 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:11,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:11,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:39:11,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 09:39:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:11,366 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 1 more)] === [2023-08-24 09:39:11,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1917460393, now seen corresponding path program 2 times [2023-08-24 09:39:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224399168] [2023-08-24 09:39:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224399168] [2023-08-24 09:39:11,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224399168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:11,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924165146] [2023-08-24 09:39:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:39:11,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:11,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:11,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:11,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 09:39:11,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:39:11,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:11,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:39:11,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:11,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:39:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924165146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:39:11,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:39:11,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-24 09:39:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627572219] [2023-08-24 09:39:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:39:11,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:39:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:39:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:39:11,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 433 [2023-08-24 09:39:11,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 389 transitions, 6917 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:11,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:11,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 433 [2023-08-24 09:39:11,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:15,745 INFO L124 PetriNetUnfolderBase]: 11800/18300 cut-off events. [2023-08-24 09:39:15,746 INFO L125 PetriNetUnfolderBase]: For 317721/317789 co-relation queries the response was YES. [2023-08-24 09:39:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133606 conditions, 18300 events. 11800/18300 cut-off events. For 317721/317789 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 119564 event pairs, 2126 based on Foata normal form. 208/17566 useless extension candidates. Maximal degree in co-relation 133533. Up to 14084 conditions per place. [2023-08-24 09:39:15,890 INFO L140 encePairwiseOnDemand]: 429/433 looper letters, 354 selfloop transitions, 56 changer transitions 44/458 dead transitions. [2023-08-24 09:39:15,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 458 transitions, 8924 flow [2023-08-24 09:39:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:39:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:39:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 818 transitions. [2023-08-24 09:39:15,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722863741339492 [2023-08-24 09:39:15,892 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 818 transitions. [2023-08-24 09:39:15,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 818 transitions. [2023-08-24 09:39:15,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:15,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 818 transitions. [2023-08-24 09:39:15,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:15,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:15,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:15,896 INFO L175 Difference]: Start difference. First operand has 199 places, 389 transitions, 6917 flow. Second operand 4 states and 818 transitions. [2023-08-24 09:39:15,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 458 transitions, 8924 flow [2023-08-24 09:39:18,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 458 transitions, 8219 flow, removed 325 selfloop flow, removed 11 redundant places. [2023-08-24 09:39:18,109 INFO L231 Difference]: Finished difference. Result has 193 places, 344 transitions, 5556 flow [2023-08-24 09:39:18,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5556, PETRI_PLACES=193, PETRI_TRANSITIONS=344} [2023-08-24 09:39:18,110 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 161 predicate places. [2023-08-24 09:39:18,110 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 344 transitions, 5556 flow [2023-08-24 09:39:18,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:18,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:18,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 09:39:18,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 09:39:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 09:39:18,316 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 1 more)] === [2023-08-24 09:39:18,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1260871773, now seen corresponding path program 6 times [2023-08-24 09:39:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:18,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068127641] [2023-08-24 09:39:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:18,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:19,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068127641] [2023-08-24 09:39:19,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068127641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584814112] [2023-08-24 09:39:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:39:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:19,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:19,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:19,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 09:39:19,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:39:19,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:19,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 09:39:19,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:19,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:39:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:39:19,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:19,633 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_726 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_726) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-24 09:39:19,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:39:19,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-24 09:39:19,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 09:39:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 09:39:19,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584814112] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:19,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:39:19,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8] total 22 [2023-08-24 09:39:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287076080] [2023-08-24 09:39:19,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:39:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:39:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:39:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2023-08-24 09:39:19,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 433 [2023-08-24 09:39:19,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 344 transitions, 5556 flow. Second operand has 7 states, 7 states have (on average 165.42857142857142) internal successors, (1158), 7 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:19,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:19,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 433 [2023-08-24 09:39:19,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:23,168 INFO L124 PetriNetUnfolderBase]: 12022/18479 cut-off events. [2023-08-24 09:39:23,169 INFO L125 PetriNetUnfolderBase]: For 306651/306703 co-relation queries the response was YES. [2023-08-24 09:39:23,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132628 conditions, 18479 events. 12022/18479 cut-off events. For 306651/306703 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 118827 event pairs, 2780 based on Foata normal form. 88/17615 useless extension candidates. Maximal degree in co-relation 132553. Up to 10549 conditions per place. [2023-08-24 09:39:23,315 INFO L140 encePairwiseOnDemand]: 419/433 looper letters, 275 selfloop transitions, 188 changer transitions 0/467 dead transitions. [2023-08-24 09:39:23,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 467 transitions, 7997 flow [2023-08-24 09:39:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:39:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:39:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1202 transitions. [2023-08-24 09:39:23,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965687891784889 [2023-08-24 09:39:23,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1202 transitions. [2023-08-24 09:39:23,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1202 transitions. [2023-08-24 09:39:23,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:23,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1202 transitions. [2023-08-24 09:39:23,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.71428571428572) internal successors, (1202), 7 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:23,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 433.0) internal successors, (3464), 8 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:23,322 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 433.0) internal successors, (3464), 8 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:23,323 INFO L175 Difference]: Start difference. First operand has 193 places, 344 transitions, 5556 flow. Second operand 7 states and 1202 transitions. [2023-08-24 09:39:23,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 467 transitions, 7997 flow [2023-08-24 09:39:24,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 467 transitions, 7543 flow, removed 210 selfloop flow, removed 12 redundant places. [2023-08-24 09:39:24,888 INFO L231 Difference]: Finished difference. Result has 173 places, 386 transitions, 6656 flow [2023-08-24 09:39:24,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6656, PETRI_PLACES=173, PETRI_TRANSITIONS=386} [2023-08-24 09:39:24,889 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 141 predicate places. [2023-08-24 09:39:24,889 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 386 transitions, 6656 flow [2023-08-24 09:39:24,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.42857142857142) internal successors, (1158), 7 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:24,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:24,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 09:39:24,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 09:39:25,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 09:39:25,090 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 1 more)] === [2023-08-24 09:39:25,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -430524221, now seen corresponding path program 7 times [2023-08-24 09:39:25,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:25,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432928482] [2023-08-24 09:39:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:39:26,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:26,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432928482] [2023-08-24 09:39:26,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432928482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:26,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546539673] [2023-08-24 09:39:26,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:39:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:26,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:26,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 09:39:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:26,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 09:39:26,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:26,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:39:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:39:26,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:39:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:39:26,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:26,749 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_788 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_788) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-24 09:39:26,812 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:39:26,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-08-24 09:39:26,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-08-24 09:39:26,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-08-24 09:39:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 09:39:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546539673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:26,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:26,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2023-08-24 09:39:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669103201] [2023-08-24 09:39:26,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:26,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:39:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:39:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=436, Unknown=8, NotChecked=42, Total=552 [2023-08-24 09:39:26,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 433 [2023-08-24 09:39:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 386 transitions, 6656 flow. Second operand has 24 states, 24 states have (on average 138.54166666666666) internal successors, (3325), 24 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:26,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:26,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 433 [2023-08-24 09:39:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:31,271 INFO L124 PetriNetUnfolderBase]: 13147/20069 cut-off events. [2023-08-24 09:39:31,271 INFO L125 PetriNetUnfolderBase]: For 319571/319641 co-relation queries the response was YES. [2023-08-24 09:39:31,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143664 conditions, 20069 events. 13147/20069 cut-off events. For 319571/319641 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 127575 event pairs, 2036 based on Foata normal form. 110/19184 useless extension candidates. Maximal degree in co-relation 143596. Up to 6081 conditions per place. [2023-08-24 09:39:31,428 INFO L140 encePairwiseOnDemand]: 426/433 looper letters, 342 selfloop transitions, 197 changer transitions 2/545 dead transitions. [2023-08-24 09:39:31,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 545 transitions, 9601 flow [2023-08-24 09:39:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:39:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:39:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1863 transitions. [2023-08-24 09:39:31,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.330964647361876 [2023-08-24 09:39:31,432 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1863 transitions. [2023-08-24 09:39:31,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1863 transitions. [2023-08-24 09:39:31,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:31,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1863 transitions. [2023-08-24 09:39:31,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.30769230769232) internal successors, (1863), 13 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:31,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 433.0) internal successors, (6062), 14 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:31,440 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 433.0) internal successors, (6062), 14 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:31,440 INFO L175 Difference]: Start difference. First operand has 173 places, 386 transitions, 6656 flow. Second operand 13 states and 1863 transitions. [2023-08-24 09:39:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 545 transitions, 9601 flow [2023-08-24 09:39:33,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 545 transitions, 8579 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-08-24 09:39:33,351 INFO L231 Difference]: Finished difference. Result has 170 places, 405 transitions, 6526 flow [2023-08-24 09:39:33,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6526, PETRI_PLACES=170, PETRI_TRANSITIONS=405} [2023-08-24 09:39:33,352 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2023-08-24 09:39:33,352 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 405 transitions, 6526 flow [2023-08-24 09:39:33,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.54166666666666) internal successors, (3325), 24 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:33,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:33,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 09:39:33,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 09:39:33,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:33,553 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 1 more)] === [2023-08-24 09:39:33,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1220482477, now seen corresponding path program 1 times [2023-08-24 09:39:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938431664] [2023-08-24 09:39:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:39:34,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938431664] [2023-08-24 09:39:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938431664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913142172] [2023-08-24 09:39:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:34,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:34,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:34,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:34,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 09:39:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:35,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-24 09:39:35,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:39:35,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:36,112 INFO L322 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2023-08-24 09:39:36,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2023-08-24 09:39:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:39:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913142172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:36,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:36,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 40 [2023-08-24 09:39:36,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802862864] [2023-08-24 09:39:36,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:36,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 09:39:36,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:36,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 09:39:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 09:39:36,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 433 [2023-08-24 09:39:36,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 405 transitions, 6526 flow. Second operand has 41 states, 41 states have (on average 123.90243902439025) internal successors, (5080), 41 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:36,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:36,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 433 [2023-08-24 09:39:36,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:59,614 INFO L124 PetriNetUnfolderBase]: 59425/88131 cut-off events. [2023-08-24 09:39:59,615 INFO L125 PetriNetUnfolderBase]: For 1150556/1150556 co-relation queries the response was YES. [2023-08-24 09:40:00,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602134 conditions, 88131 events. 59425/88131 cut-off events. For 1150556/1150556 co-relation queries the response was YES. Maximal size of possible extension queue 3469. Compared 659286 event pairs, 3394 based on Foata normal form. 0/82447 useless extension candidates. Maximal degree in co-relation 602073. Up to 19693 conditions per place. [2023-08-24 09:40:00,814 INFO L140 encePairwiseOnDemand]: 416/433 looper letters, 1599 selfloop transitions, 2502 changer transitions 5/4106 dead transitions. [2023-08-24 09:40:00,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 4106 transitions, 69752 flow [2023-08-24 09:40:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-24 09:40:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-24 09:40:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 11208 transitions. [2023-08-24 09:40:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30452384186931125 [2023-08-24 09:40:00,830 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 11208 transitions. [2023-08-24 09:40:00,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 11208 transitions. [2023-08-24 09:40:00,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:40:00,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 11208 transitions. [2023-08-24 09:40:00,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 131.85882352941175) internal successors, (11208), 85 states have internal predecessors, (11208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:00,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 433.0) internal successors, (37238), 86 states have internal predecessors, (37238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:00,879 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 433.0) internal successors, (37238), 86 states have internal predecessors, (37238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:00,879 INFO L175 Difference]: Start difference. First operand has 170 places, 405 transitions, 6526 flow. Second operand 85 states and 11208 transitions. [2023-08-24 09:40:00,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 4106 transitions, 69752 flow [2023-08-24 09:40:16,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 4106 transitions, 69432 flow, removed 137 selfloop flow, removed 7 redundant places. [2023-08-24 09:40:16,966 INFO L231 Difference]: Finished difference. Result has 289 places, 3175 transitions, 63267 flow [2023-08-24 09:40:16,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=63267, PETRI_PLACES=289, PETRI_TRANSITIONS=3175} [2023-08-24 09:40:16,967 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 257 predicate places. [2023-08-24 09:40:16,967 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 3175 transitions, 63267 flow [2023-08-24 09:40:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 123.90243902439025) internal successors, (5080), 41 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:40:16,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 09:40:16,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 09:40:17,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:40:17,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:40:17,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:40:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash -577769549, now seen corresponding path program 2 times [2023-08-24 09:40:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:40:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449891723] [2023-08-24 09:40:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:40:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:40:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:40:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:40:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:40:18,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449891723] [2023-08-24 09:40:18,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449891723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:40:18,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853801865] [2023-08-24 09:40:18,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:40:18,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:40:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:40:18,469 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:40:18,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 09:40:18,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:40:18,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:40:18,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 09:40:18,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:40:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:40:20,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:40:20,927 INFO L322 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2023-08-24 09:40:20,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2023-08-24 09:40:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:40:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853801865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:40:21,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:40:21,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 5] total 23 [2023-08-24 09:40:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129078042] [2023-08-24 09:40:21,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:40:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:40:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:40:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:40:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2023-08-24 09:40:21,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 433 [2023-08-24 09:40:21,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 3175 transitions, 63267 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:21,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:40:21,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 433 [2023-08-24 09:40:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:41:24,425 INFO L124 PetriNetUnfolderBase]: 79114/116220 cut-off events. [2023-08-24 09:41:24,425 INFO L125 PetriNetUnfolderBase]: For 4021848/4021968 co-relation queries the response was YES. [2023-08-24 09:41:26,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097039 conditions, 116220 events. 79114/116220 cut-off events. For 4021848/4021968 co-relation queries the response was YES. Maximal size of possible extension queue 4413. Compared 878779 event pairs, 15016 based on Foata normal form. 607/113040 useless extension candidates. Maximal degree in co-relation 1096937. Up to 78297 conditions per place. [2023-08-24 09:41:26,790 INFO L140 encePairwiseOnDemand]: 420/433 looper letters, 4296 selfloop transitions, 246 changer transitions 0/4554 dead transitions. [2023-08-24 09:41:26,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 4554 transitions, 98551 flow [2023-08-24 09:41:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 09:41:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 09:41:26,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3125 transitions. [2023-08-24 09:41:26,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32804954860382113 [2023-08-24 09:41:26,795 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3125 transitions. [2023-08-24 09:41:26,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3125 transitions. [2023-08-24 09:41:26,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:41:26,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3125 transitions. [2023-08-24 09:41:26,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:26,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 433.0) internal successors, (9959), 23 states have internal predecessors, (9959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:26,805 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 433.0) internal successors, (9959), 23 states have internal predecessors, (9959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:26,805 INFO L175 Difference]: Start difference. First operand has 289 places, 3175 transitions, 63267 flow. Second operand 22 states and 3125 transitions. [2023-08-24 09:41:26,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 4554 transitions, 98551 flow [2023-08-24 09:44:27,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 4554 transitions, 94046 flow, removed 2249 selfloop flow, removed 3 redundant places. [2023-08-24 09:44:27,366 INFO L231 Difference]: Finished difference. Result has 312 places, 3195 transitions, 60341 flow [2023-08-24 09:44:27,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=59030, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=60341, PETRI_PLACES=312, PETRI_TRANSITIONS=3195} [2023-08-24 09:44:27,369 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 280 predicate places. [2023-08-24 09:44:27,369 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 3195 transitions, 60341 flow [2023-08-24 09:44:27,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:27,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:27,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 09:44:27,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:27,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-24 09:44:27,570 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:44:27,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1184963433, now seen corresponding path program 3 times [2023-08-24 09:44:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:27,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035895003] [2023-08-24 09:44:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:27,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:44:28,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:28,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035895003] [2023-08-24 09:44:28,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035895003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:28,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175194944] [2023-08-24 09:44:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:44:28,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:28,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:28,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 09:44:28,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:44:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:28,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:44:28,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 09:44:28,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:28,334 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 09:44:28,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-24 09:44:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 09:44:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175194944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:28,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:28,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 3] total 12 [2023-08-24 09:44:28,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799894417] [2023-08-24 09:44:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:28,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 09:44:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 09:44:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:44:28,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 433 [2023-08-24 09:44:28,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 3195 transitions, 60341 flow. Second operand has 13 states, 13 states have (on average 147.23076923076923) internal successors, (1914), 13 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:28,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:28,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 433 [2023-08-24 09:44:28,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:49,648 INFO L124 PetriNetUnfolderBase]: 100577/147263 cut-off events. [2023-08-24 09:45:49,649 INFO L125 PetriNetUnfolderBase]: For 4904387/4904527 co-relation queries the response was YES. [2023-08-24 09:45:51,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362158 conditions, 147263 events. 100577/147263 cut-off events. For 4904387/4904527 co-relation queries the response was YES. Maximal size of possible extension queue 5468. Compared 1141243 event pairs, 15970 based on Foata normal form. 1919/146570 useless extension candidates. Maximal degree in co-relation 1362050. Up to 72761 conditions per place. [2023-08-24 09:45:52,678 INFO L140 encePairwiseOnDemand]: 423/433 looper letters, 4038 selfloop transitions, 406 changer transitions 0/4456 dead transitions. [2023-08-24 09:45:52,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 4456 transitions, 93160 flow [2023-08-24 09:45:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:45:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:45:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1670 transitions. [2023-08-24 09:45:52,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.350619357547764 [2023-08-24 09:45:52,681 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1670 transitions. [2023-08-24 09:45:52,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1670 transitions. [2023-08-24 09:45:52,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:52,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1670 transitions. [2023-08-24 09:45:52,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.8181818181818) internal successors, (1670), 11 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:45:52,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 433.0) internal successors, (5196), 12 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:45:52,687 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 433.0) internal successors, (5196), 12 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:45:52,687 INFO L175 Difference]: Start difference. First operand has 312 places, 3195 transitions, 60341 flow. Second operand 11 states and 1670 transitions. [2023-08-24 09:45:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 4456 transitions, 93160 flow [2023-08-24 09:49:25,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 4456 transitions, 92698 flow, removed 145 selfloop flow, removed 10 redundant places. [2023-08-24 09:49:25,330 INFO L231 Difference]: Finished difference. Result has 316 places, 3351 transitions, 64622 flow [2023-08-24 09:49:25,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=59467, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=64622, PETRI_PLACES=316, PETRI_TRANSITIONS=3351} [2023-08-24 09:49:25,333 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 284 predicate places. [2023-08-24 09:49:25,333 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 3351 transitions, 64622 flow [2023-08-24 09:49:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 147.23076923076923) internal successors, (1914), 13 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:49:25,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:49:25,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 09:49:25,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 09:49:25,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 09:49:25,540 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:49:25,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:49:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -200378745, now seen corresponding path program 4 times [2023-08-24 09:49:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:49:25,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986526726] [2023-08-24 09:49:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:49:25,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:49:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:49:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:27,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:49:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986526726] [2023-08-24 09:49:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986526726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:49:27,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210993541] [2023-08-24 09:49:27,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:49:27,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:49:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:49:27,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:49:27,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 09:49:27,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:49:27,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:49:27,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 09:49:27,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:49:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:49:27,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 09:49:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:49:27,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:49:27,550 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1029 (Array Int Int)) (~q2~0.offset Int)) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1029) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 0)) (not (= (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))))) is different from false [2023-08-24 09:49:27,619 INFO L322 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-08-24 09:49:27,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 106 [2023-08-24 09:49:27,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 09:49:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-24 09:49:27,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210993541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:49:27,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:49:27,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 29 [2023-08-24 09:49:27,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217955726] [2023-08-24 09:49:27,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:49:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:49:27,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:49:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:49:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=736, Unknown=2, NotChecked=54, Total=870 [2023-08-24 09:49:27,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 433 [2023-08-24 09:49:27,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 3351 transitions, 64622 flow. Second operand has 30 states, 30 states have (on average 129.43333333333334) internal successors, (3883), 30 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:49:27,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:49:27,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 433 [2023-08-24 09:49:27,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand